Subject: Re: [Healeys] Overheating

From: Michael Salter via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 17:51:38 -0500

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Thanks for all that Bob.
One comment regarding increasing the cooling system pressure.
I rebuild quite a few Healey water pumps and can say unequivocally that the
seal type used in both the early and late style of 6 cylinder pump will not
handle much more than 7 p.s.i.
I would not recommend trying that approach.

M

On Sat., Mar. 6, 2021, 4:58 p.m. , <[email-masked]> wrote:

> Bob & Mike:
>
>
>
> You both may have seen my requests on overheating of my BJ8 and the
> response from the group.  As a result, I purchased an infrared thermomete=
r
> to determine if my water gauge was giving accurate readings.  The
> thermometer gun told me that my water gauge was 30 degrees higher than th=
e
> temperature of the sensor attached to the block.  At the same time, I
> noticed my gauge will show 120 degrees at rest instead of going down to 9=
0
> degrees which would indicate a 30-degree high reading.  In May when I lea=
ve
> for cool Michigan, I will send the gauge to Nisonger to be rebuilt.
>
>
>
> I began to test the temperature of the water going through the cooling
> system at the inlet to and outlet from the block, inlet and outlet to the
> radiator and the upper and lower hoses while the engine is running at idl=
e
> and at 2-3 Thousand rpm.  The chart I created to record these temperature=
s
> allowed me to produce observations or averages because the flow of the
> water is dependent upon the rpms of the engine.  The engine has overheate=
d
> all of the 40 years I have owned it and has only 1000 miles on the new
> speedo since rebuilding to 20 over.
>
>
>
> At the radiator inlet 134 outlet 85 at high rpms with electric fan
> operating.
>
>                         inlet 103 outlet 94 at idle rpms with electric fa=
n
> operating.
>
>
>
> The above temperatures are recorded at the inlet and all along the hoses.
>
>
>
> These temperatures indicate the pump is circulating water with sufficient
> gallons to cool the engine only when the engine is at high rpms.  At idle
> the pump does not circulate sufficient water to keep the engine cool.  Th=
is
> is especially true when you have been operating the engine at high speed
> and come down to 30 =E2=80=93 40 mph and stop and go traffic.  Maybe the =
real
> answer is to install an electric pump for constant cooling water?
>
>
>
> In the past week, I have installed a large Dorman coolant recovery tank
> and a new 7 psi 1 inch radiator cap because I learned that our radiators
> have a long neck.  Both those changes have reduced my problem of very hig=
h
> overheating and resulting boiling over.  In addition, when my water gauge
> shows 212 degrees the water temperature is actually 30 degrees less or
> approximately 185 degrees.  Also, I am not boiling over and loosing
> coolant.  Nevertheless, the engine water temperature is still spiking to
> 210 plus degrees true when coming off highway speeds.
>
>
>
> In my review of various sites, the radiator equipment suppliers and other=
s
> are recommending increasing the pressure in the classic car systems to 15
> psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, rad=
iator,
> hoses etc. is new=E2=80=9D and therefore can hold the pressure.  Unfortun=
ately, I
> have not found any maker of a 1 inch depth x 2.33 inch diameter radiator
> cap except our 7 psi cap so I can try such a pressurized system.
>
>
>
> Another suggestion on an older discussion at the British Car Forum
> indicated some of the Ontario car owners had switched to Evans Waterless
> Coolant rather than 50/50 coolant water mixture.
>
>
>
> I still have no idea why a minority of our group has overheating
> problems.  More ideas?
>
>
>
> Regards,
>
>
>
> Bob Begani 67 BJ8
>
>
>
> *From:* Healeys <[email-masked]> *On Behalf Of *Michael
> Salter via Healeys
> *Sent:* Saturday, March 6, 2021 12:20 PM
> *To:* Bob Spidell <[email-masked]>
> *Cc:* [email-masked]
> *Subject:* Re: [Healeys] 100 water pumps
>
>
>
> Yes Bob, there is something wrong with our assumptions regarding the
> cooling system not being "large" enough.
>
> My wifes Maxima is around 300 HP and the radiator has less area than the
> 100. Certainly it has a couple of very effective electric fans but they
> really don't cut in very often unless you have the AC on.
>
> I'm suspicious of the rate of circulation but I've talked to Larry Varley
> about this subject and he indicated that increasing the size of the water
> pump annular orifice didn't make much difference when he tried it.
>
>
>
> M
>
>
>
> M
>
>
>
> On Sat, Mar 6, 2021 at 11:42 AM Bob Spidell <[email-masked]> wrote:
>
> I sold my late father's 1955 Thunderbird to my BFF. These cars have a ver=
y
> similar problem to Healeys overheating, esp. at idle. When Ford stuffed t=
he
> 292ci Y-Block into the T-Bird, they found the engine was (essentially) to=
o
> short for the long-hooded car, so they 'engineered'--I use the term
> loosely--a cast iron spacer to move the fan closer to the radiator. The
> spacer had the added 'benefit' of severely limiting coolant flow through
> the pump and radiator; there are some aftermarket fixes and my friend,
> after doing the usual radiator re-core, better fan, etc. installed both a
> better pump (larger vanes) and a re-engineered spacer. Attached pic is no=
t
> of the spacer he used--I can't find the link to it--but it shows the
> general idea (Ford basically put a 'dam' in the cooling system to block
> flow, and the improved spacers mostly remove it). It appears this approac=
h
> has improved cooling, though the engine probably still gets warm if it ha=
s
> to sit too long at idle. Link is to one of the improved pumps:
>
>
> https://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per-=
car/productinfo/8501HO/
>
> Anyways, after doing all the usual stuff to increase cooling, esp. on my
> BJ8, I've wondered if a similar approach would work on Healeys. Their pum=
ps
> have very small vanes, and the cavity in which the vanes operate seems
> pretty small for such a large lump of cast iron (I'm guessing an uprated
> radiator core won't help much if the coolant flow is still hampered; at
> least, that's what I've found). This is probably not an option as, of
> course, our engines don't have a similar spacer to be improved upon, and =
it
> would be a major task to increase both the cavity's size and the pump (bu=
t
> I can dream).
>
> ps. The overheating issue with Healeys is usually attributed to too big o=
f
> an engine in too small of an engine compartment, and too little airflow.
> But, the engine bay in an old T-Bird is huge by comparison--and the engin=
e
> not terribly larger in displacement--and still suffers the same problem.
>
> Bob
>
>
>
>

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<div dir=3D"auto">Thanks for all that Bob.=C2=A0<div dir=3D"auto">One comme=
nt regarding increasing the cooling system pressure.=C2=A0</div><div dir=3D=
"auto">I rebuild quite a few Healey water pumps and can say unequivocally t=
hat the seal type used in both the early and late style of 6 cylinder pump =
will not handle much more than 7 p.s.i.=C2=A0</div><div dir=3D"auto">I woul=
d not recommend trying that approach.=C2=A0</div><div dir=3D"auto"><br></di=
v><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr">On Sat., Mar. 6, 2021, 4:58 p.m. , &lt;<a href=
=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px=
 #ccc solid;padding-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=3D"pu=
rple" style=3D"word-wrap:break-word"><div class=3D"m_-4589831803634194626Wo=
rdSection1"><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-fam=
ily:&quot;Arial&quot;,sans-serif">Bob &amp; Mike:<u></u><u></u></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Ari=
al&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal">=
<span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">Y=
ou both may have seen my requests on overheating of my BJ8 and the response=
 from the group.=C2=A0 As a result, I purchased an infrared thermometer to =
determine if my water gauge was giving accurate readings.=C2=A0 The thermom=
eter gun told me that my water gauge was 30 degrees higher than the tempera=
ture of the sensor attached to the block.=C2=A0 At the same time, I noticed=
 my gauge will show 120 degrees at rest instead of going down to 90 degrees=
 which would indicate a 30-degree high reading.=C2=A0 In May when I leave f=
or cool Michigan, I will send the gauge to Nisonger to be rebuilt.<u></u><u=
></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font=
-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&qu=
ot;,sans-serif">I began to test the temperature of the water going through =
the cooling system at the inlet to and outlet from the block, inlet and out=
let to the radiator and the upper and lower hoses while the engine is runni=
ng at idle and at 2-3 Thousand rpm.=C2=A0 The chart I created to record the=
se temperatures allowed me to produce observations or averages because the =
flow of the water is dependent upon the rpms of the engine.=C2=A0 The engin=
e has overheated all of the 40 years I have owned it and has only 1000 mile=
s on the new speedo since rebuilding to 20 over. <u></u><u></u></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Ari=
al&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal">=
<span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">A=
t the radiator inlet 134 outlet 85 at high rpms with electric fan operating=
.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:1=
4.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 inlet 103 outlet 94 at idle rpms with =
electric fan operating. <u></u><u></u></span></p><p class=3D"MsoNormal"><sp=
an style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u><=
/u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:=
14.0pt;font-family:&quot;Arial&quot;,sans-serif">The above temperatures are=
 recorded at the inlet and all along the hoses.<u></u><u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial=
&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">The=
se temperatures indicate the pump is circulating water with sufficient gall=
ons to cool the engine only when the engine is at high rpms.=C2=A0 At idle =
the pump does not circulate sufficient water to keep the engine cool.=C2=A0=
 This is especially true when you have been operating the engine at high sp=
eed and come down to 30 =E2=80=93 40 mph and stop and go traffic.=C2=A0 May=
be the real answer is to install an electric pump for constant cooling wate=
r?<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:=
14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span=
></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&qu=
ot;Arial&quot;,sans-serif">In the past week, I have installed a large Dorma=
n coolant recovery tank and a new 7 psi 1 inch radiator cap because I learn=
ed that our radiators have a long neck.=C2=A0 Both those changes have reduc=
ed my problem of very high overheating and resulting boiling over.=C2=A0 In=
 addition, when my water gauge shows 212 degrees the water temperature is a=
ctually 30 degrees less or approximately 185 degrees.=C2=A0 Also, I am not =
boiling over and loosing coolant.=C2=A0 Nevertheless, the engine water temp=
erature is still spiking to 210 plus degrees true when coming off highway s=
peeds.=C2=A0 <u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u=
></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font=
-family:&quot;Arial&quot;,sans-serif">In my review of various sites, the ra=
diator equipment suppliers and others are recommending increasing the press=
ure in the classic car systems to 15 psi plus, and coolant recovery tanks =
=E2=80=9Cif your coolant system, radiator, hoses etc. is new=E2=80=9D and t=
herefore can hold the pressure.=C2=A0 Unfortunately, I have not found any m=
aker of a 1 inch depth x 2.33 inch diameter radiator cap except our 7 psi c=
ap so I can try such a pressurized system.<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot=
;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">Another =
suggestion on an older discussion at the British Car Forum indicated some o=
f the Ontario car owners had switched to Evans Waterless Coolant rather tha=
n 50/50 coolant water mixture.<u></u><u></u></span></p><p class=3D"MsoNorma=
l"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif=
"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font=
-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">I still have no idea=
 why a minority of our group has overheating problems.=C2=A0 More ideas?<u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0p=
t;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>=
<p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif">Regards,<u></u><u></u></span></p><p class=3D"MsoNorma=
l"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif=
"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font=
-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">Bob Begani 67 BJ8 <u=
></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0=
pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p=
><div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in=
 0in 0in"><p class=3D"MsoNormal"><b>From:</b> Healeys &lt;<a href=3D"mailto=
:[email-masked]" target=3D"_blank" rel=3D"noreferrer">heale=
[email-masked]</a>&gt; <b>On Behalf Of </b>Michael Salter via He=
aleys<br><b>Sent:</b> Saturday, March 6, 2021 12:20 PM<br><b>To:</b> Bob Sp=
idell &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"=
noreferrer">[email-masked]</a>&gt;<br><b>Cc:</b> <a href=3D"mailto:he=
[email-masked]" target=3D"_blank" rel=3D"noreferrer">[email-masked]=
am.net</a><br><b>Subject:</b> Re: [Healeys] 100 water pumps<u></u><u></u></=
p></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=
=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif">Yes Bob, there is something wrong with our assumptions regard=
ing the cooling system not being &quot;large&quot; enough. </span><span sty=
le=3D"font-size:12.0pt"><u></u><u></u></span></p></div><div><p class=3D"Mso=
Normal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-=
serif">My wifes Maxima is around 300 HP and the radiator has less area than=
 the 100. Certainly it has a couple of very effective electric fans but the=
y really don&#39;t cut in very often unless you have the AC on.</span><span=
 style=3D"font-size:12.0pt"><u></u><u></u></span></p></div><div><p class=3D=
"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,s=
ans-serif">I&#39;m suspicious of the rate of circulation but I&#39;ve talke=
d to Larry Varley about this subject and he indicated that increasing the s=
ize of the water pump annular orifice didn&#39;t make much difference when =
he tried it.</span><span style=3D"font-size:12.0pt"><u></u><u></u></span></=
p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt"><u></u=
>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"f=
ont-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">M</span><span sty=
le=3D"font-size:12.0pt;font-family:&quot;Comic Sans MS&quot;"><u></u><u></u=
></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:12.0=
pt;font-family:&quot;Comic Sans MS&quot;"><u></u>=C2=A0<u></u></span></p></=
div><div><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family=
:&quot;Comic Sans MS&quot;">M<u></u><u></u></span></p></div></div><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal">On =
Sat, Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<a href=3D"mailto:bspidell@com=
cast.net" target=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&gt;=
 wrote:<u></u><u></u></p></div><blockquote style=3D"border:none;border-left=
:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-rig=
ht:0in"><div><p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom=
:12.0pt;margin-left:11.4pt">I sold my late father&#39;s 1955 Thunderbird to=
 my BFF. These cars have a very similar problem to Healeys overheating, esp=
. at idle. When Ford stuffed the 292ci Y-Block into the T-Bird, they found =
the engine was (essentially) too short for the long-hooded car, so they &#3=
9;engineered&#39;--I use the term loosely--a cast iron spacer to move the f=
an closer to the radiator. The spacer had the added &#39;benefit&#39; of se=
verely limiting coolant flow through the pump and radiator; there are some =
aftermarket fixes and my friend, after doing the usual radiator re-core, be=
tter fan, etc. installed both a better pump (larger vanes) and a re-enginee=
red spacer. Attached pic is not of the spacer he used--I can&#39;t find the=
 link to it--but it shows the general idea (Ford basically put a &#39;dam&#=
39; in the cooling system to block flow, and the improved spacers mostly re=
move it). It appears this approach has improved cooling, though the engine =
probably still gets warm if it has to sit too long at idle. Link is to one =
of the improved pumps:<br><br><a href=3D"https://www.classictbird.com/Water=
-Pump-Modified-for-Higher-Output-1-Per-car/productinfo/8501HO/" target=3D"_=
blank" rel=3D"noreferrer">https://www.classictbird.com/Water-Pump-Modified-=
for-Higher-Output-1-Per-car/productinfo/8501HO/</a><br><br>Anyways, after d=
oing all the usual stuff to increase cooling, esp. on my BJ8, I&#39;ve wond=
ered if a similar approach would work on Healeys. Their pumps have very sma=
ll vanes, and the cavity in which the vanes operate seems pretty small for =
such a large lump of cast iron (I&#39;m guessing an uprated radiator core w=
on&#39;t help much if the coolant flow is still hampered; at least, that&#3=
9;s what I&#39;ve found). This is probably not an option as, of course, our=
 engines don&#39;t have a similar spacer to be improved upon, and it would =
be a major task to increase both the cavity&#39;s size and the pump (but I =
can dream).<br><br>ps. The overheating issue with Healeys is usually attrib=
uted to too big of an engine in too small of an engine compartment, and too=
 little airflow. But, the engine bay in an old T-Bird is huge by comparison=
--and the engine not terribly larger in displacement--and still suffers the=
 same problem.<br><br>Bob <u></u><u></u></p></div><p class=3D"MsoNormal" st=
yle=3D"margin-bottom:12.0pt"><u></u>=C2=A0<u></u></p></blockquote></div></d=
iv></div></blockquote></div>

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_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive

[email-masked]
http://autox.team.net/mailman/listinfo/healeys

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---

From: Michael MacLean via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 23:39:19 +0000 (UTC)

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 Bob,=C2=A0=C2=A0=C2=A0 All you have to do is take out the temp gauge and p=
ut the sensor end in boiling water.=C2=A0 Open the front of the gauge by tw=
isting off the chrome bezel and remove the glass.=C2=A0 Remove the needle c=
arefully (watchmakers usually put a sheet of plastic over the gauge and lev=
er it off with two plastic levers)=C2=A0 then carefully press it back on at=
 a 212 degree reading.=C2=A0 The needle is just a press on fit.=C2=A0 This =
all Nisongers is going to do.=C2=A0 Obviously the gauge is working, just re=
ading incorrectly.=C2=A0 The worst that could happen is you can't get it ba=
ck together, then you can send it to Nisongers.=C2=A0 Try to save some mone=
y first.=C2=A0 You're going to need it for the ever rising gas prices.Mike =
MacLean

    On Saturday, March 6, 2021, 1:58:37 PM PST, [email-masked] <rfbegan=
[email-masked]> wrote: =20
=20
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Bob & Mike:

 =C2=A0

You both may have seen my requests on overheating of my BJ8 and the respons=
e from the group.=C2=A0 As a result, I purchased an infrared thermometer to=
 determine if my water gauge was giving accurate readings.=C2=A0 The thermo=
meter gun told me that my water gauge was 30 degrees higher than the temper=
ature of the sensor attached to the block.=C2=A0 At the same time, I notice=
d my gauge will show 120 degrees at rest instead of going down to 90 degree=
s which would indicate a 30-degree high reading.=C2=A0 In May when I leave =
for cool Michigan, I will send the gauge to Nisonger to be rebuilt.

 =C2=A0

I began to test the temperature of the water going through the cooling syst=
em at the inlet to and outlet from the block, inlet and outlet to the radia=
tor and the upper and lower hoses while the engine is running at idle and a=
t 2-3 Thousand rpm.=C2=A0 The chart I created to record these temperatures =
allowed me to produce observations or averages because the flow of the wate=
r is dependent upon the rpms of the engine.=C2=A0 The engine has overheated=
 all of the 40 years I have owned it and has only 1000 miles on the new spe=
edo since rebuilding to 20 over.=20

 =C2=A0

At the radiator inlet 134 outlet 85 at high rpms with electric fan operatin=
g.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 inlet 103 o=
utlet 94 at idle rpms with electric fan operating.=20

 =C2=A0

 =C2=A0

These temperatures indicate the pump is circulating water with sufficient g=
allons to cool the engine only when the engine is at high rpms.=C2=A0 At id=
le the pump does not circulate sufficient water to keep the engine cool.=C2=
=A0 This is especially true when you have been operating the engine at high=
 speed and come down to 30 =E2=80=93 40 mph and stop and go traffic.=C2=A0 =
Maybe the real answer is to install an electric pump for constant cooling w=
ater?

 =C2=A0

In the past week, I have installed a large Dorman coolant recovery tank and=
 a new 7 psi 1 inch radiator cap because I learned that our radiators have =
a long neck.=C2=A0 Both those changes have reduced my problem of very high =
overheating and resulting boiling over. =C2=A0In addition, when my water ga=
uge shows 212 degrees the water temperature is actually 30 degrees less or =
approximately 185 degrees.=C2=A0 Also, I am not boiling over and loosing co=
olant.=C2=A0 Nevertheless, the engine water temperature is still spiking to=
 210 plus degrees true when coming off highway speeds.=C2=A0=20

 =C2=A0

In my review of various sites, the radiator equipment suppliers and others =
are recommending increasing the pressure in the classic car systems to 15 p=
si plus, and coolant recovery tanks =E2=80=9Cif your coolant system, radiat=
or, hoses etc. is new=E2=80=9D and therefore can hold the pressure.=C2=A0 U=
nfortunately, I have not found any maker of a 1 inch depth x 2.33 inch diam=
eter radiator cap except our 7 psi cap so I can try such a pressurized syst=
em.

 =C2=A0

Another suggestion on an older discussion at the British Car Forum indicate=
d some of the Ontario car owners had switched to Evans Waterless Coolant ra=
ther than 50/50 coolant water mixture.

 =C2=A0

I still have no idea why a minority of our group has overheating problems.=
=C2=A0 More ideas?

 =C2=A0

Regards,

 =C2=A0

Bob Begani 67 BJ8=20

 =C2=A0

From: Healeys <[email-masked]> On Behalf Of Michael Salter =
via Healeys
Sent: Saturday, March 6, 2021 12:20 PM
To: Bob Spidell <[email-masked]>
Cc: [email-masked]
Subject: Re: [Healeys] 100 water pumps

 =C2=A0

Yes Bob, there is something wrong with our assumptions regarding the coolin=
g system not being "large" enough.=20

My wifes Maxima is around 300 HP and the radiator has less area than the 10=
0. Certainly it has a couple of very effective electric fans but they reall=
y don't cut in very often unless you have the AC on.

I'm suspicious of the rate of circulation but I've talked to Larry Varley a=
bout this subject and he indicated that increasing the size of the water pu=
mp annular orifice didn't make much difference when he tried it.

 =C2=A0

M

 =C2=A0

M

 =C2=A0

I sold my late father's 1955 Thunderbird to my BFF. These cars have a very =
similar problem to Healeys overheating, esp. at idle. When Ford stuffed the=
 292ci Y-Block into the T-Bird, they found the engine was (essentially) too=
 short for the long-hooded car, so they 'engineered'--I use the term loosel=
y--a cast iron spacer to move the fan closer to the radiator. The spacer ha=
d the added 'benefit' of severely limiting coolant flow through the pump an=
d radiator; there are some aftermarket fixes and my friend, after doing the=
 usual radiator re-core, better fan, etc. installed both a better pump (lar=
ger vanes) and a re-engineered spacer. Attached pic is not of the spacer he=
 used--I can't find the link to it--but it shows the general idea (Ford bas=
ically put a 'dam' in the cooling system to block flow, and the improved sp=
acers mostly remove it). It appears this approach has improved cooling, tho=
ugh the engine probably still gets warm if it has to sit too long at idle. =
Link is to one of the improved pumps:

https://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per-ca=
r/productinfo/8501HO/

Anyways, after doing all the usual stuff to increase cooling, esp. on my BJ=
8, I've wondered if a similar approach would work on Healeys. Their pumps h=
ave very small vanes, and the cavity in which the vanes operate seems prett=
y small for such a large lump of cast iron (I'm guessing an uprated radiato=
r core won't help much if the coolant flow is still hampered; at least, tha=
t's what I've found). This is probably not an option as, of course, our eng=
ines don't have a similar spacer to be improved upon, and it would be a maj=
or task to increase both the cavity's size and the pump (but I can dream).

ps. The overheating issue with Healeys is usually attributed to too big of =
an engine in too small of an engine compartment, and too little airflow. Bu=
t, the engine bay in an old T-Bird is huge by comparison--and the engine no=
t terribly larger in displacement--and still suffers the same problem.

Bob=20

 =C2=A0

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e

[email-masked]

[email-masked]

 =20
------=_Part_765968_644317808.1615073959841
Content-Transfer-Encoding: quoted-printable

<html><head></head><body><div class=3D"ydp68ad1384yahoo-style-wrap" style=
=3D"font-family:times new roman, new york, times, serif;font-size:16px;"><d=
iv></div>
        <div dir=3D"ltr" data-setdir=3D"false">Bob,</div><div dir=3D"ltr" d=
ata-setdir=3D"false">&nbsp;&nbsp;&nbsp; All you have to do is take out the =
temp gauge and put the sensor end in boiling water.&nbsp; Open the front of=
 the gauge by twisting off the chrome bezel and remove the glass.&nbsp; Rem=
ove the needle carefully (watchmakers usually put a sheet of plastic over t=
he gauge and lever it off with two plastic levers)&nbsp; then carefully pre=
ss it back on at a 212 degree reading.&nbsp; The needle is just a press on =
fit.&nbsp; This all Nisongers is going to do.&nbsp; Obviously the gauge is =
working, just reading incorrectly.&nbsp; The worst that could happen is you=
 can't get it back together, then you can send it to Nisongers.&nbsp; Try t=
o save some money first.&nbsp; You're going to need it for the ever rising =
gas prices.</div><div dir=3D"ltr" data-setdir=3D"false">Mike MacLean<br></d=
iv><div><br></div>
       =20
        </div><div id=3D"yahoo_quoted_5382246048" class=3D"yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                    On Saturday, March 6, 2021, 1:58:37 PM PST, rfbegani@gm=
ail.com &lt;[email-masked]&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"yiv2931163553"><style><!--
#yiv2931163553 =20
 _filtered {}
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#yiv2931163553 =20
#yiv2931163553 p.yiv2931163553MsoNormal, #yiv2931163553 li.yiv2931163553Mso=
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=09{margin:0in;font-size:11.0pt;font-family:"Calibri", sans-serif;}
#yiv2931163553 a:link, #yiv2931163553 span.yiv2931163553MsoHyperlink
=09{color:blue;text-decoration:underline;}
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t-style:normal;}
#yiv2931163553 .yiv2931163553MsoChpDefault
=09{font-size:10.0pt;}
 _filtered {}
#yiv2931163553 div.yiv2931163553WordSection1
=09{}
--></style><div><div class=3D"yiv2931163553WordSection1"><p class=3D"yiv293=
1163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sans-s=
erif;">Bob &amp; Mike:</span></p><p class=3D"yiv2931163553MsoNormal"><span =
style=3D"font-size:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p=
><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-f=
amily:Arial, sans-serif;">You both may have seen my requests on overheating=
 of my BJ8 and the response from the group.&nbsp; As a result, I purchased =
an infrared thermometer to determine if my water gauge was giving accurate =
readings.&nbsp; The thermometer gun told me that my water gauge was 30 degr=
ees higher than the temperature of the sensor attached to the block.&nbsp; =
At the same time, I noticed my gauge will show 120 degrees at rest instead =
of going down to 90 degrees which would indicate a 30-degree high reading.&=
nbsp; In May when I leave for cool Michigan, I will send the gauge to Nison=
ger to be rebuilt.</span></p><p class=3D"yiv2931163553MsoNormal"><span styl=
e=3D"font-size:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p =
class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-famil=
y:Arial, sans-serif;">I began to test the temperature of the water going th=
rough the cooling system at the inlet to and outlet from the block, inlet a=
nd outlet to the radiator and the upper and lower hoses while the engine is=
 running at idle and at 2-3 Thousand rpm.&nbsp; The chart I created to reco=
rd these temperatures allowed me to produce observations or averages becaus=
e the flow of the water is dependent upon the rpms of the engine.&nbsp; The=
 engine has overheated all of the 40 years I have owned it and has only 100=
0 miles on the new speedo since rebuilding to 20 over. </span></p><p class=
=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Ari=
al, sans-serif;"> &nbsp;</span></p><p class=3D"yiv2931163553MsoNormal"><spa=
n style=3D"font-size:14.0pt;font-family:Arial, sans-serif;">At the radiator=
 inlet 134 outlet 85 at high rpms with electric fan operating.</span></p><p=
 class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-fami=
ly:Arial, sans-serif;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp; inlet 103 outlet 94 at idle rpms with electric fan operating. <=
/span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0=
pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yiv2931163=
553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sans-serif=
;">The above temperatures are recorded at the inlet and all along the hoses=
.</span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14=
.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yiv29311=
63553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sans-ser=
if;">These temperatures indicate the pump is circulating water with suffici=
ent gallons to cool the engine only when the engine is at high rpms.&nbsp; =
At idle the pump does not circulate sufficient water to keep the engine coo=
l.&nbsp; This is especially true when you have been operating the engine at=
 high speed and come down to 30 =E2=80=93 40 mph and stop and go traffic.&n=
bsp; Maybe the real answer is to install an electric pump for constant cool=
ing water?</span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"fon=
t-size:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D=
"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial,=
 sans-serif;">In the past week, I have installed a large Dorman coolant rec=
overy tank and a new 7 psi 1 inch radiator cap because I learned that our r=
adiators have a long neck.&nbsp; Both those changes have reduced my problem=
 of very high overheating and resulting boiling over. &nbsp;In addition, wh=
en my water gauge shows 212 degrees the water temperature is actually 30 de=
grees less or approximately 185 degrees.&nbsp; Also, I am not boiling over =
and loosing coolant.&nbsp; Nevertheless, the engine water temperature is st=
ill spiking to 210 plus degrees true when coming off highway speeds.&nbsp; =
</span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.=
0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yiv293116=
3553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sans-seri=
f;">In my review of various sites, the radiator equipment suppliers and oth=
ers are recommending increasing the pressure in the classic car systems to =
15 psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, ra=
diator, hoses etc. is new=E2=80=9D and therefore can hold the pressure.&nbs=
p; Unfortunately, I have not found any maker of a 1 inch depth x 2.33 inch =
diameter radiator cap except our 7 psi cap so I can try such a pressurized =
system.</span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-s=
ize:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yi=
v2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sa=
ns-serif;">Another suggestion on an older discussion at the British Car For=
um indicated some of the Ontario car owners had switched to Evans Waterless=
 Coolant rather than 50/50 coolant water mixture.</span></p><p class=3D"yiv=
2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, san=
s-serif;"> &nbsp;</span></p><p class=3D"yiv2931163553MsoNormal"><span style=
=3D"font-size:14.0pt;font-family:Arial, sans-serif;">I still have no idea w=
hy a minority of our group has overheating problems.&nbsp; More ideas?</spa=
n></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:14.0pt;f=
ont-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yiv2931163553M=
soNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sans-serif;">R=
egards,</span></p><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-s=
ize:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</span></p><p class=3D"yi=
v2931163553MsoNormal"><span style=3D"font-size:14.0pt;font-family:Arial, sa=
ns-serif;">Bob Begani 67 BJ8 </span></p><p class=3D"yiv2931163553MsoNormal"=
><span style=3D"font-size:14.0pt;font-family:Arial, sans-serif;"> &nbsp;</s=
pan></p><div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.=
0pt 0in 0in 0in;"><p class=3D"yiv2931163553MsoNormal"><b>From:</b> Healeys =
&lt;[email-masked]&gt; <b>On Behalf Of </b>Michael Salter v=
ia Healeys<br><b>Sent:</b> Saturday, March 6, 2021 12:20 PM<br><b>To:</b> B=
ob Spidell &lt;[email-masked]&gt;<br><b>Cc:</b> [email-masked]=
t<br><b>Subject:</b> Re: [Healeys] 100 water pumps</p></div><p class=3D"yiv=
2931163553MsoNormal"> &nbsp;</p><div><div><p class=3D"yiv2931163553MsoNorma=
l"><span style=3D"font-size:12.0pt;font-family:Arial, sans-serif;">Yes Bob,=
 there is something wrong with our assumptions regarding the cooling system=
 not being "large" enough. </span><span style=3D"font-size:12.0pt;"></span>=
</p></div><div><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size=
:12.0pt;font-family:Arial, sans-serif;">My wifes Maxima is around 300 HP an=
d the radiator has less area than the 100. Certainly it has a couple of ver=
y effective electric fans but they really don't cut in very often unless yo=
u have the AC on.</span><span style=3D"font-size:12.0pt;"></span></p></div>=
<div><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:12.0pt;fo=
nt-family:Arial, sans-serif;">I'm suspicious of the rate of circulation but=
 I've talked to Larry Varley about this subject and he indicated that incre=
asing the size of the water pump annular orifice didn't make much differenc=
e when he tried it.</span><span style=3D"font-size:12.0pt;"></span></p></di=
v><div><p class=3D"yiv2931163553MsoNormal"><span style=3D"font-size:12.0pt;=
"> &nbsp;</span></p></div><div><p class=3D"yiv2931163553MsoNormal"><span st=
yle=3D"font-size:12.0pt;font-family:Arial, sans-serif;">M</span><span style=
=3D"font-size:12.0pt;font-family:Comic Sans MS;"></span></p></div><div><p c=
lass=3D"yiv2931163553MsoNormal"><span style=3D"font-size:12.0pt;font-family=
:Comic Sans MS;"> &nbsp;</span></p></div><div><p class=3D"yiv2931163553MsoN=
ormal"><span style=3D"font-size:12.0pt;font-family:Comic Sans MS;">M</span>=
</p></div></div><p class=3D"yiv2931163553MsoNormal"> &nbsp;</p><div><div><p=
 class=3D"yiv2931163553MsoNormal">On Sat, Mar 6, 2021 at 11:42 AM Bob Spide=
ll &lt;<a rel=3D"nofollow noopener noreferrer" ymailto=3D"mailto:bspidell@c=
omcast.net" target=3D"_blank" href=3D"mailto:[email-masked]">bspidell=
@comcast.net</a>&gt; wrote:</p></div><blockquote style=3D"border:none;borde=
r-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;marg=
in-right:0in;"><div><p class=3D"yiv2931163553MsoNormal" style=3D"margin-rig=
ht:0in;margin-bottom:12.0pt;margin-left:11.4pt;">I sold my late father's 19=
55 Thunderbird to my BFF. These cars have a very similar problem to Healeys=
 overheating, esp. at idle. When Ford stuffed the 292ci Y-Block into the T-=
Bird, they found the engine was (essentially) too short for the long-hooded=
 car, so they 'engineered'--I use the term loosely--a cast iron spacer to m=
ove the fan closer to the radiator. The spacer had the added 'benefit' of s=
everely limiting coolant flow through the pump and radiator; there are some=
 aftermarket fixes and my friend, after doing the usual radiator re-core, b=
etter fan, etc. installed both a better pump (larger vanes) and a re-engine=
ered spacer. Attached pic is not of the spacer he used--I can't find the li=
nk to it--but it shows the general idea (Ford basically put a 'dam' in the =
cooling system to block flow, and the improved spacers mostly remove it). I=
t appears this approach has improved cooling, though the engine probably st=
ill gets warm if it has to sit too long at idle. Link is to one of the impr=
oved pumps:<br><br><a rel=3D"nofollow noopener noreferrer" target=3D"_blank=
" href=3D"https://www.classictbird.com/Water-Pump-Modified-for-Higher-Outpu=
t-1-Per-car/productinfo/8501HO/">https://www.classictbird.com/Water-Pump-Mo=
dified-for-Higher-Output-1-Per-car/productinfo/8501HO/</a><br><br>Anyways, =
after doing all the usual stuff to increase cooling, esp. on my BJ8, I've w=
ondered if a similar approach would work on Healeys. Their pumps have very =
small vanes, and the cavity in which the vanes operate seems pretty small f=
or such a large lump of cast iron (I'm guessing an uprated radiator core wo=
n't help much if the coolant flow is still hampered; at least, that's what =
I've found). This is probably not an option as, of course, our engines don'=
t have a similar spacer to be improved upon, and it would be a major task t=
o increase both the cavity's size and the pump (but I can dream).<br><br>ps=
. The overheating issue with Healeys is usually attributed to too big of an=
 engine in too small of an engine compartment, and too little airflow. But,=
 the engine bay in an old T-Bird is huge by comparison--and the engine not =
terribly larger in displacement--and still suffers the same problem.<br><br=
>Bob </p></div><p class=3D"yiv2931163553MsoNormal" style=3D"margin-bottom:1=
2.0pt;"> &nbsp;</p></blockquote></div></div></div></div>___________________=
____________________________<br>Support Team.Net <a href=3D"http://www.team=
.net/donate.html" target=3D"_blank">http://www.team.net/donate.html</a><br>=
w.team.net/pipermail/healeys " target=3D"_blank">http://www.team.net/piperm=
ail/healeys </a><a href=3D"http://autox.team.net/archive" target=3D"_blank"=
>http://autox.team.net/archive</a><br><br><a ymailto=3D"mailto:Healeys@auto=
x.team.net" href=3D"mailto:[email-masked]">[email-masked]</=
a><br><a href=3D"http://autox.team.net/mailman/listinfo/healeys" target=3D"=
_blank">http://autox.team.net/mailman/listinfo/healeys</a><br><br>Unsubscri=
be/Manage: <a href=3D"http://autox.team.net/mailman/options/healeys/rrengin=
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ealeys/[email-masked]</a><br><br></div>
            </div>
        </div></body></html>
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[email-masked]

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---

From: warthodson--- via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 23:40:35 +0000 (UTC)

--===============5657431724786126582==
	boundary="----=_Part_218127_97379569.1615074035741"

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Content-Transfer-Encoding: quoted-printable

It seems to me that switching from a 7 PSI radiator cap to a 15PSI cap is n=
ot a solution to an overheating problem but rather a band-aid.=C2=A0 =C2=A0
Gary Hodson

-----Original Message-----
From: [email-masked]
To: 'Michael Salter' <[email-masked]>; 'Bob Spidell' <bspidell@com=
cast.net>; 'Ahealey help' <[email-masked]>
Sent: Sat, Mar 6, 2021 3:58 pm
Subject: [Healeys] Overheating

<!--#yiv7728791887 _filtered {} _filtered {} _filtered {}#yiv7728791887 #yi=
v7728791887 p.yiv7728791887MsoNormal, #yiv7728791887 li.yiv7728791887MsoNor=
mal, #yiv7728791887 div.yiv7728791887MsoNormal {margin:0in;font-size:11.0pt=
;font-family:"Calibri", sans-serif;}#yiv7728791887 a:link, #yiv7728791887 s=
pan.yiv7728791887MsoHyperlink {color:blue;text-decoration:underline;}#yiv77=
28791887 span.yiv7728791887EmailStyle18 {font-family:"Arial", sans-serif;co=
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8791887MsoChpDefault {font-size:10.0pt;} _filtered {}#yiv7728791887 div.yiv=
7728791887WordSection1 {}-->Bob & Mike: =C2=A0You both may have seen my req=
uests on overheating of my BJ8 and the response from the group.=C2=A0 As a =
result, I purchased an infrared thermometer to determine if my water gauge =
was giving accurate readings.=C2=A0 The thermometer gun told me that my wat=
er gauge was 30 degrees higher than the temperature of the sensor attached =
to the block.=C2=A0 At the same time, I noticed my gauge will show 120 degr=
ees at rest instead of going down to 90 degrees which would indicate a 30-d=
egree high reading.=C2=A0 In May when I leave for cool Michigan, I will sen=
d the gauge to Nisonger to be rebuilt. =C2=A0I began to test the temperatur=
e of the water going through the cooling system at the inlet to and outlet =
from the block, inlet and outlet to the radiator and the upper and lower ho=
ses while the engine is running at idle and at 2-3 Thousand rpm.=C2=A0 The =
chart I created to record these temperatures allowed me to produce observat=
ions or averages because the flow of the water is dependent upon the rpms o=
f the engine.=C2=A0 The engine has overheated all of the 40 years I have ow=
ned it and has only 1000 miles on the new speedo since rebuilding to 20 ove=
r.  =C2=A0At the radiator inlet 134 outlet 85 at high rpms with electric fa=
n operating.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 inlet 103 outlet 94 at idle rpms with electric fan operating.  =C2=A0The a=
bove temperatures are recorded at the inlet and all along the hoses. =C2=A0=
These temperatures indicate the pump is circulating water with sufficient g=
allons to cool the engine only when the engine is at high rpms.=C2=A0 At id=
le the pump does not circulate sufficient water to keep the engine cool.=C2=
=A0 This is especially true when you have been operating the engine at high=
 speed and come down to 30 =E2=80=93 40 mph and stop and go traffic.=C2=A0 =
Maybe the real answer is to install an electric pump for constant cooling w=
ater? =C2=A0In the past week, I have installed a large Dorman coolant recov=
ery tank and a new 7 psi 1 inch radiator cap because I learned that our rad=
iators have a long neck.=C2=A0 Both those changes have reduced my problem o=
f very high overheating and resulting boiling over. =C2=A0In addition, when=
 my water gauge shows 212 degrees the water temperature is actually 30 degr=
ees less or approximately 185 degrees.=C2=A0 Also, I am not boiling over an=
d loosing coolant.=C2=A0 Nevertheless, the engine water temperature is stil=
l spiking to 210 plus degrees true when coming off highway speeds.=C2=A0  =
=C2=A0In my review of various sites, the radiator equipment suppliers and o=
thers are recommending increasing the pressure in the classic car systems t=
o 15 psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, =
radiator, hoses etc. is new=E2=80=9D and therefore can hold the pressure.=
=C2=A0 Unfortunately, I have not found any maker of a 1 inch depth x 2.33 i=
nch diameter radiator cap except our 7 psi cap so I can try such a pressuri=
zed system. =C2=A0Another suggestion on an older discussion at the British =
Car Forum indicated some of the Ontario car owners had switched to Evans Wa=
terless Coolant rather than 50/50 coolant water mixture. =C2=A0I still have=
 no idea why a minority of our group has overheating problems.=C2=A0 More i=
deas? =C2=A0Regards, =C2=A0Bob Begani 67 BJ8  =C2=A0

------=_Part_218127_97379569.1615074035741
Content-Transfer-Encoding: quoted-printable

<div style=3D"color:black;font: 12pt Comic Sans MS, sans-serif;">It seems t=
o me that switching from a 7 PSI radiator cap to a 15PSI cap is not a solut=
ion to an overheating problem but rather a band-aid.&nbsp; &nbsp;<br>
Gary Hodson<br>
<br>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
 size=3D"2">-----Original Message-----<br>
From: [email-masked]<br>
To: 'Michael Salter' &lt;[email-masked]&gt;; 'Bob Spidell' &lt;bsp=
[email-masked]&gt;; 'Ahealey help' &lt;[email-masked]&gt;<br>
Sent: Sat, Mar 6, 2021 3:58 pm<br>
Subject: [Healeys] Overheating<br>
<br>

<div id=3D"yiv7728791887"><style><!--
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<div class=3D"yiv7728791887WordSection1">
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">Bob &amp; Mike:</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">You both may have seen my requests o=
n overheating of my BJ8 and the response from the group.&nbsp; As a result,=
 I purchased an infrared thermometer to determine if my water gauge was giv=
ing accurate readings.&nbsp; The thermometer gun told me that my water gaug=
e was 30 degrees higher than the temperature of the sensor attached to the =
block.&nbsp; At the same time, I noticed my gauge will show 120 degrees at =
rest instead of going down to 90 degrees which would indicate a 30-degree h=
igh reading.&nbsp; In May when I leave for cool Michigan, I will send the g=
auge to Nisonger to be rebuilt.</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">I began to test the temperature of t=
he water going through the cooling system at the inlet to and outlet from t=
he block, inlet and outlet to the radiator and the upper and lower hoses wh=
ile the engine is running at idle and at 2-3 Thousand rpm.&nbsp; The chart =
I created to record these temperatures allowed me to produce observations o=
r averages because the flow of the water is dependent upon the rpms of the =
engine.&nbsp; The engine has overheated all of the 40 years I have owned it=
 and has only 1000 miles on the new speedo since rebuilding to 20 over. </s=
pan></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">At the radiator inlet 134 outlet 85 =
at high rpms with electric fan operating.</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; inlet 103 outlet 94 at idle rpms with electric =
fan operating. </span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">The above temperatures are recorded =
at the inlet and all along the hoses.</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">These temperatures indicate the pump=
 is circulating water with sufficient gallons to cool the engine only when =
the engine is at high rpms.&nbsp; At idle the pump does not circulate suffi=
cient water to keep the engine cool.&nbsp; This is especially true when you=
 have been operating the engine at high speed and come down to 30 =E2=80=93=
 40 mph and stop and go traffic.&nbsp; Maybe the real answer is to install =
an electric pump for constant cooling water?</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">In the past week, I have installed a=
 large Dorman coolant recovery tank and a new 7 psi 1 inch radiator cap bec=
ause I learned that our radiators have a long neck.&nbsp; Both those change=
s have reduced my problem of very high overheating and resulting boiling ov=
er. &nbsp;In addition, when my water gauge shows 212 degrees the water temp=
erature is actually 30 degrees less or approximately 185 degrees.&nbsp; Als=
o, I am not boiling over and loosing coolant.&nbsp; Nevertheless, the engin=
e water temperature is still spiking to 210 plus degrees true when coming o=
ff highway speeds.&nbsp; </span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">In my review of various sites, the r=
adiator equipment suppliers and others are recommending increasing the pres=
sure in the classic car systems to 15 psi plus, and coolant recovery tanks =
=E2=80=9Cif your coolant system, radiator, hoses etc. is new=E2=80=9D and t=
herefore can hold the pressure.&nbsp; Unfortunately, I have not found any m=
aker of a 1 inch depth x 2.33 inch diameter radiator cap except our 7 psi c=
ap so I can try such a pressurized system.</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">Another suggestion on an older discu=
ssion at the British Car Forum indicated some of the Ontario car owners had=
 switched to Evans Waterless Coolant rather than 50/50 coolant water mixtur=
e.</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">I still have no idea why a minority =
of our group has overheating problems.&nbsp; More ideas?</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">Regards,</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;">Bob Begani 67 BJ8 </span></div>

<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:&quot;Arial&quot;, sans-serif;"> &nbsp;</span></div>

<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in;">
<div class=3D"yiv7728791887MsoNormal"><br>
</div>
</div>
</div>
</div>
</div>
</font></div>
</div>

------=_Part_218127_97379569.1615074035741--

--===============5657431724786126582==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

[email-masked]

--===============5657431724786126582==--

---

From: Simon Lachlan via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 00:49:44 -0000

This is a multipart message in MIME format.

--===============2883650202520196334==
	boundary="----=_NextPart_000_0006_01D712EB.C5FA03B0"
Content-Language: en-gb

This is a multipart message in MIME format.

------=_NextPart_000_0006_01D712EB.C5FA03B0
	charset="utf-8"
Content-Transfer-Encoding: quoted-printable

Using an original type stat helps too ie the one with a sleeve. Helps, =
not cures all.

Simon

=20

From: Healeys <[email-masked]> On Behalf Of =
warthodson--- via Healeys
Sent: 06 March 2021 23:41
To: [email-masked]; [email-masked]; [email-masked]; =
[email-masked]
Subject: Re: [Healeys] Overheating

=20

It seems to me that switching from a 7 PSI radiator cap to a 15PSI cap =
is not a solution to an overheating problem but rather a band-aid.  =20
Gary Hodson

-----Original Message-----
To: 'Michael Salter' <[email-masked] =
Sent: Sat, Mar 6, 2021 3:58 pm
Subject: [Healeys] Overheating

Bob & Mike:

=20

You both may have seen my requests on overheating of my BJ8 and the =
response from the group.  As a result, I purchased an infrared =
thermometer to determine if my water gauge was giving accurate readings. =
 The thermometer gun told me that my water gauge was 30 degrees higher =
than the temperature of the sensor attached to the block.  At the same =
time, I noticed my gauge will show 120 degrees at rest instead of going =
down to 90 degrees which would indicate a 30-degree high reading.  In =
May when I leave for cool Michigan, I will send the gauge to Nisonger to =
be rebuilt.

=20

I began to test the temperature of the water going through the cooling =
system at the inlet to and outlet from the block, inlet and outlet to =
the radiator and the upper and lower hoses while the engine is running =
at idle and at 2-3 Thousand rpm.  The chart I created to record these =
temperatures allowed me to produce observations or averages because the =
flow of the water is dependent upon the rpms of the engine.  The engine =
has overheated all of the 40 years I have owned it and has only 1000 =
miles on the new speedo since rebuilding to 20 over.=20

=20

At the radiator inlet 134 outlet 85 at high rpms with electric fan =
operating.

                        inlet 103 outlet 94 at idle rpms with electric =
fan operating.=20

=20

The above temperatures are recorded at the inlet and all along the =
hoses.

=20

These temperatures indicate the pump is circulating water with =
sufficient gallons to cool the engine only when the engine is at high =
rpms.  At idle the pump does not circulate sufficient water to keep the =
engine cool.  This is especially true when you have been operating the =
engine at high speed and come down to 30 =E2=80=93 40 mph and stop and =
go traffic.  Maybe the real answer is to install an electric pump for =
constant cooling water?

=20

In the past week, I have installed a large Dorman coolant recovery tank =
and a new 7 psi 1 inch radiator cap because I learned that our radiators =
have a long neck.  Both those changes have reduced my problem of very =
high overheating and resulting boiling over.  In addition, when my water =
gauge shows 212 degrees the water temperature is actually 30 degrees =
less or approximately 185 degrees.  Also, I am not boiling over and =
loosing coolant.  Nevertheless, the engine water temperature is still =
spiking to 210 plus degrees true when coming off highway speeds. =20

=20

In my review of various sites, the radiator equipment suppliers and =
others are recommending increasing the pressure in the classic car =
systems to 15 psi plus, and coolant recovery tanks =E2=80=9Cif your =
coolant system, radiator, hoses etc. is new=E2=80=9D and therefore can =
hold the pressure.  Unfortunately, I have not found any maker of a 1 =
inch depth x 2.33 inch diameter radiator cap except our 7 psi cap so I =
can try such a pressurized system.

=20

Another suggestion on an older discussion at the British Car Forum =
indicated some of the Ontario car owners had switched to Evans Waterless =
Coolant rather than 50/50 coolant water mixture.

=20

I still have no idea why a minority of our group has overheating =
problems.  More ideas?

=20

Regards,

=20

Bob Begani 67 BJ8=20

=20

=20

------=_NextPart_000_0006_01D712EB.C5FA03B0
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'>Using an original type stat helps =
too ie the one with a sleeve. Helps, not cures =
all.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'>Simon<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> Healeys =
&lt;[email-masked]&gt; <b>On Behalf Of </b>warthodson--- =
via Healeys<br><b>Sent:</b> 06 March 2021 23:41<br><b>To:</b> =
[email-masked]; [email-masked]; [email-masked]; =
[email-masked]<br><b>Subject:</b> Re: [Healeys] =
Overheating<o:p></o:p></span></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:12.0pt;font-family:"Comic Sans MS";color:black'>It =
seems to me that switching from a 7 PSI radiator cap to a 15PSI cap is =
not a solution to an overheating problem but rather a band-aid.&nbsp; =
&nbsp;<br>Gary Hodson<o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>---=
--Original Message-----<br>From: <a =
href=3D"mailto:[email-masked]">[email-masked]</a><br>To: =
'Michael Salter' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
'Bob Spidell' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
'Ahealey help' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
Sent: Sat, Mar 6, 2021 3:58 pm<br>Subject: [Healeys] =
Overheating<o:p></o:p></span></p><div =
id=3Dyiv7728791887><div><div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Bob=
 &amp; Mike:</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>You=
 both may have seen my requests on overheating of my BJ8 and the =
response from the group.&nbsp; As a result, I purchased an infrared =
thermometer to determine if my water gauge was giving accurate =
readings.&nbsp; The thermometer gun told me that my water gauge was 30 =
degrees higher than the temperature of the sensor attached to the =
block.&nbsp; At the same time, I noticed my gauge will show 120 degrees =
at rest instead of going down to 90 degrees which would indicate a =
30-degree high reading.&nbsp; In May when I leave for cool Michigan, I =
will send the gauge to Nisonger to be rebuilt.</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>I =
began to test the temperature of the water going through the cooling =
system at the inlet to and outlet from the block, inlet and outlet to =
the radiator and the upper and lower hoses while the engine is running =
at idle and at 2-3 Thousand rpm.&nbsp; The chart I created to record =
these temperatures allowed me to produce observations or averages =
because the flow of the water is dependent upon the rpms of the =
engine.&nbsp; The engine has overheated all of the 40 years I have owned =
it and has only 1000 miles on the new speedo since rebuilding to 20 =
over. </span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>At =
the radiator inlet 134 outlet 85 at high rpms with electric fan =
operating.</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inlet 103 =
outlet 94 at idle rpms with electric fan operating. </span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>The=
 above temperatures are recorded at the inlet and all along the =
hoses.</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>The=
se temperatures indicate the pump is circulating water with sufficient =
gallons to cool the engine only when the engine is at high rpms.&nbsp; =
At idle the pump does not circulate sufficient water to keep the engine =
cool.&nbsp; This is especially true when you have been operating the =
engine at high speed and come down to 30 =E2=80=93 40 mph and stop and =
go traffic.&nbsp; Maybe the real answer is to install an electric pump =
for constant cooling water?</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>In =
the past week, I have installed a large Dorman coolant recovery tank and =
a new 7 psi 1 inch radiator cap because I learned that our radiators =
have a long neck.&nbsp; Both those changes have reduced my problem of =
very high overheating and resulting boiling over. &nbsp;In addition, =
when my water gauge shows 212 degrees the water temperature is actually =
30 degrees less or approximately 185 degrees.&nbsp; Also, I am not =
boiling over and loosing coolant.&nbsp; Nevertheless, the engine water =
temperature is still spiking to 210 plus degrees true when coming off =
highway speeds.&nbsp; </span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>In =
my review of various sites, the radiator equipment suppliers and others =
are recommending increasing the pressure in the classic car systems to =
15 psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, =
radiator, hoses etc. is new=E2=80=9D and therefore can hold the =
pressure.&nbsp; Unfortunately, I have not found any maker of a 1 inch =
depth x 2.33 inch diameter radiator cap except our 7 psi cap so I can =
try such a pressurized system.</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Ano=
ther suggestion on an older discussion at the British Car Forum =
indicated some of the Ontario car owners had switched to Evans Waterless =
Coolant rather than 50/50 coolant water mixture.</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>I =
still have no idea why a minority of our group has overheating =
problems.&nbsp; More ideas?</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Reg=
ards,</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Bob=
 Begani 67 BJ8 </span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p></o:p></span></p></div><div style=3D'border:none;border-top:solid =
#E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p>&nbsp;</o:p></span></p></div></div></div></div></div></div></div></div>=
</body></html>
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[email-masked]

--===============2883650202520196334==--

---

From: Bob Spidell via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 16:58:05 -0800

This is a multi-part message in MIME format.
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Anyone tried a smaller diameter pulley on the pump?

On 3/6/2021 4:49 PM, Simon Lachlan via Healeys wrote:
>
> Using an original type stat helps too ie the one with a sleeve. Helps, 
> not cures all.
>
> Simon
>
> *From:*Healeys <[email-masked]> *On Behalf Of 
> *warthodson--- via Healeys
> *Sent:* 06 March 2021 23:41
> *To:* [email-masked]; [email-masked]; 
> [email-masked]; [email-masked]
> *Subject:* Re: [Healeys] Overheating
>
> It seems to me that switching from a 7 PSI radiator cap to a 15PSI cap 
> is not a solution to an overheating problem but rather a band-aid.
> Gary Hodson
>
> To: 'Michael Salter' <[email-masked] 
> response from the group.  As a result, I purchased an infrared 
> thermometer to determine if my water gauge was giving accurate 
> readings.  The thermometer gun told me that my water gauge was 30 
> degrees higher than the temperature of the sensor attached to the 
> block.  At the same time, I noticed my gauge will show 120 degrees at 
> rest instead of going down to 90 degrees which would indicate a 
> 30-degree high reading.  In May when I leave for cool Michigan, I will 
> send the gauge to Nisonger to be rebuilt.
>
> system at the inlet to and outlet from the block, inlet and outlet to 
> the radiator and the upper and lower hoses while the engine is running 
> at idle and at 2-3 Thousand rpm.  The chart I created to record these 
> temperatures allowed me to produce observations or averages because 
> the flow of the water is dependent upon the rpms of the engine.  The 
> engine has overheated all of the 40 years I have owned it and has only 
> 1000 miles on the new speedo since rebuilding to 20 over.
>
> inlet 103 outlet 94 at idle rpms with electric fan operating.
>
> These temperatures indicate the pump is circulating water with 
> sufficient gallons to cool the engine only when the engine is at high 
> rpms.  At idle the pump does not circulate sufficient water to keep 
> the engine cool.  This is especially true when you have been operating 
> the engine at high speed and come down to 30 – 40 mph and stop and go 
> traffic.  Maybe the real answer is to install an electric pump for 
> constant cooling water?
>
> In the past week, I have installed a large Dorman coolant recovery 
> tank and a new 7 psi 1 inch radiator cap because I learned that our 
> radiators have a long neck.  Both those changes have reduced my 
> problem of very high overheating and resulting boiling over.  In 
> addition, when my water gauge shows 212 degrees the water temperature 
> is actually 30 degrees less or approximately 185 degrees.  Also, I am 
> not boiling over and loosing coolant.  Nevertheless, the engine water 
> temperature is still spiking to 210 plus degrees true when coming off 
> highway speeds.
>
> In my review of various sites, the radiator equipment suppliers and 
> others are recommending increasing the pressure in the classic car 
> systems to 15 psi plus, and coolant recovery tanks “if your coolant 
> system, radiator, hoses etc. is new” and therefore can hold the 
> pressure.  Unfortunately, I have not found any maker of a 1 inch depth 
> x 2.33 inch diameter radiator cap except our 7 psi cap so I can try 
> such a pressurized system.
>
> indicated some of the Ontario car owners had switched to Evans 
> Waterless Coolant rather than 50/50 coolant water mixture.
>

--------------C4ABE6EF9F5EA2AD1D71EA12
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  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
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    Anyone tried a smaller diameter pulley on the pump?<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 3/6/2021 4:49 PM, Simon Lachlan via
      Healeys wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US">Using
            an original type stat helps too ie the one with a sleeve.
            Helps, not cures all.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
        <div style="border:none;border-top:solid #E1E1E1
          1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
              lang="EN-US"> Healeys
              <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a> <b>On Behalf Of </b>warthodson---
              via Healeys<br>
              <b>Sent:</b> 06 March 2021 23:41<br>
              <b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>; <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>;
              <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>; <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a><br>
              <b>Subject:</b> Re: [Healeys] Overheating<o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
              style="font-size:12.0pt;font-family:&quot;Comic Sans
              MS&quot;;color:black">It seems to me that switching from a
              7 PSI radiator cap to a 15PSI cap is not a solution to an
              overheating problem but rather a band-aid.   <br>
              Gary Hodson<o:p></o:p></span></p>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">-----Original
                Message-----<br>
                From: <a href="mailto:[email-masked]"
                  moz-do-not-send="true">[email-masked]</a><br>
                To: 'Michael Salter' &lt;<a
                  href="mailto:[email-masked]"
                  moz-do-not-send="true">[email-masked]</a>&gt;;
                'Bob Spidell' &lt;<a href="mailto:[email-masked]"
                  moz-do-not-send="true">[email-masked]</a>&gt;;
                'Ahealey help' &lt;<a
                  href="mailto:[email-masked]"
                  moz-do-not-send="true">[email-masked]</a>&gt;<br>
                Sent: Sat, Mar 6, 2021 3:58 pm<br>
                Subject: [Healeys] Overheating<o:p></o:p></span></p>
            <div id="yiv7728791887">
              <div>
                <div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Bob
                        &amp; Mike:</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">You
                        both may have seen my requests on overheating of
                        my BJ8 and the response from the group.  As a
                        result, I purchased an infrared thermometer to
                        determine if my water gauge was giving accurate
                        readings.  The thermometer gun told me that my
                        water gauge was 30 degrees higher than the
                        temperature of the sensor attached to the
                        block.  At the same time, I noticed my gauge
                        will show 120 degrees at rest instead of going
                        down to 90 degrees which would indicate a
                        30-degree high reading.  In May when I leave for
                        cool Michigan, I will send the gauge to Nisonger
                        to be rebuilt.</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">I
                        began to test the temperature of the water going
                        through the cooling system at the inlet to and
                        outlet from the block, inlet and outlet to the
                        radiator and the upper and lower hoses while the
                        engine is running at idle and at 2-3 Thousand
                        rpm.  The chart I created to record these
                        temperatures allowed me to produce observations
                        or averages because the flow of the water is
                        dependent upon the rpms of the engine.  The
                        engine has overheated all of the 40 years I have
                        owned it and has only 1000 miles on the new
                        speedo since rebuilding to 20 over. </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">At
                        the radiator inlet 134 outlet 85 at high rpms
                        with electric fan operating.</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">                       
                        inlet 103 outlet 94 at idle rpms with electric
                        fan operating. </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">The
                        above temperatures are recorded at the inlet and
                        all along the hoses.</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">These
                        temperatures indicate the pump is circulating
                        water with sufficient gallons to cool the engine
                        only when the engine is at high rpms.  At idle
                        the pump does not circulate sufficient water to
                        keep the engine cool.  This is especially true
                        when you have been operating the engine at high
                        speed and come down to 30 – 40 mph and stop and
                        go traffic.  Maybe the real answer is to install
                        an electric pump for constant cooling water?</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">In
                        the past week, I have installed a large Dorman
                        coolant recovery tank and a new 7 psi 1 inch
                        radiator cap because I learned that our
                        radiators have a long neck.  Both those changes
                        have reduced my problem of very high overheating
                        and resulting boiling over.  In addition, when
                        my water gauge shows 212 degrees the water
                        temperature is actually 30 degrees less or
                        approximately 185 degrees.  Also, I am not
                        boiling over and loosing coolant.  Nevertheless,
                        the engine water temperature is still spiking to
                        210 plus degrees true when coming off highway
                        speeds.  </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">In
                        my review of various sites, the radiator
                        equipment suppliers and others are recommending
                        increasing the pressure in the classic car
                        systems to 15 psi plus, and coolant recovery
                        tanks “if your coolant system, radiator, hoses
                        etc. is new” and therefore can hold the
                        pressure.  Unfortunately, I have not found any
                        maker of a 1 inch depth x 2.33 inch diameter
                        radiator cap except our 7 psi cap so I can try
                        such a pressurized system.</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Another
                        suggestion on an older discussion at the British
                        Car Forum indicated some of the Ontario car
                        owners had switched to Evans Waterless Coolant
                        rather than 50/50 coolant water mixture.</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">I
                        still have no idea why a minority of our group
                        has overheating problems.  More ideas?</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Regards,</span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Bob
                        Begani 67 BJ8 </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  </div>
                  <br>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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[email-masked]

--===============2441425133330846088==--

---

From: Roger Grace via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 17:25:24 -0800

--===============0278741721504077537==

--000000000000e7a8a305bce831bb
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 I concur that at low RPM the flow rate is significantly reduced - as it
should be with this type of pump - flow is proportional to speed.  On my
BJ8 I measure oil temp and top rad. hose temp plus some other temps. Single
gauge with switches
So, I added an electric water pump (EWP) that I manually switch on when
approaching traffic. I use the same switch to switch on an electric fan. My
experience is that the EWP is by far better than just an electric fan - you
need to move the water through the rad. Very noticeable to prevent heat
soak too when you shut down the engine and you can see the temp dropping.
The EWP goes in the bottom hose and is quite inconspicuous. Took about 3
hrs to install. In series with the mechanical pump and literature says
little resistance when off  eg when cruising and RPM higher and EWP not
required.
Can post photo if anyone is interested plus pump details.
rg

On Sat, Mar 6, 2021 at 4:59 PM Bob Spidell via Healeys <
[email-masked]> wrote:

> Using an original type stat helps too ie the one with a sleeve. Helps, no=
t
> cures all.
>
> Simon
>
>
>
> *From:* Healeys <[email-masked]>
> <[email-masked]> *On Behalf Of *warthodson--- via Healeys
> *To:* [email-masked]; [email-masked]; [email-masked];
> [email-masked]
> It seems to me that switching from a 7 PSI radiator cap to a 15PSI cap is
> not a solution to an overheating problem but rather a band-aid.
> Gary Hodson
>
> To: 'Michael Salter' <[email-masked]>; 'Bob Spidell' <
> [email-masked]>; 'Ahealey help' <[email-masked]>
r
e
0
ve
e
s
d
n
is
real
h
s
iator,
ately, I
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

--000000000000e7a8a305bce831bb
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">
<div dir=3D"ltr"><div>I concur that at low RPM the flow rate is=20
significantly reduced - as it should be with this type of pump - flow is
 proportional to speed.=C2=A0 On my BJ8 I measure oil temp and top rad. hos=
e=20
temp plus some other temps. Single gauge with switches<br></div><div>=20
So, I added an electric water pump (EWP) that I manually switch on when=20
approaching traffic. I use the same switch to switch on an electric fan.
 My experience is that the EWP is by far better than just an electric=20
fan - you need to move the water through the rad. Very noticeable to=20
prevent heat soak too when you shut down the engine and you can see the=20
temp dropping.<br></div><div>The EWP goes in the bottom hose and is quite i=
nconspicuous. Took about 3 hrs to install. In series with the mechanical pu=
mp and literature says little resistance when off=C2=A0 eg when cruising an=
d RPM higher and EWP not required.<br></div><div>Can post photo if anyone i=
s interested plus pump details.</div><div>rg<br></div></div><div id=3D"m_66=
37601715642283581gmail-m_3013810619985836242DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F=
9FDF2"><br></div>

</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Sat, Mar 6, 2021 at 4:59 PM Bob Spidell via Healeys &lt;<a href=3D"mailt=
o:[email-masked]" target=3D"_blank">[email-masked]</a>&gt; =
wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
 =20
   =20
 =20
  <div>
    Anyone tried a smaller diameter pulley on the pump?<br>
    <br>
    <br>
    <div>On 3/6/2021 4:49 PM, Simon Lachlan via
      Healeys wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
     =20
     =20
      <div>
        <p class=3D"MsoNormal"><span>Using
            an original type stat helps too ie the one with a sleeve.
            Helps, not cures all.<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span>Simon<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
        <div style=3D"border-color:rgb(225,225,225) currentcolor currentcol=
or;border-style:solid none none;border-width:1pt medium medium;padding:3pt =
0cm 0cm">
          <p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><s=
pan lang=3D"EN-US"> Healeys
              <a href=3D"mailto:[email-masked]" target=3D"_=
blank">&lt;[email-masked]&gt;</a> <b>On Behalf Of </b>warth=
odson---
              via Healeys<br>
              <b>Sent:</b> 06 March 2021 23:41<br>
              <b>To:</b> <a href=3D"mailto:[email-masked]" target=3D"_b=
lank">[email-masked]</a>; <a href=3D"mailto:[email-masked]" ta=
rget=3D"_blank">[email-masked]</a>;
              <a href=3D"mailto:[email-masked]" target=3D"_blank">bsp=
[email-masked]</a>; <a href=3D"mailto:[email-masked]" target=3D"=
_blank">[email-masked]</a><br>
              <b>Subject:</b> Re: [Healeys] Overheating<u></u><u></u></span=
></p>
        </div>
        <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
        <div>
          <p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span>It seem=
s to me that switching from a
              7 PSI radiator cap to a 15PSI cap is not a solution to an
              overheating problem but rather a band-aid.=C2=A0 =C2=A0<br>
              Gary Hodson<u></u><u></u></span></p>
          <div>
            <p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=
=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black">--=
---Original
                Message-----<br>
                From: <a href=3D"mailto:[email-masked]" target=3D"_blan=
k">[email-masked]</a><br>
                To: &#39;Michael Salter&#39; &lt;<a href=3D"mailto:michaels=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt;;
                &#39;Bob Spidell&#39; &lt;<a href=3D"mailto:bspidell@comcas=
t.net" target=3D"_blank">[email-masked]</a>&gt;;
                &#39;Ahealey help&#39; &lt;<a href=3D"mailto:healeys@autox.=
team.net" target=3D"_blank">[email-masked]</a>&gt;<br>
                Sent: Sat, Mar 6, 2021 3:58 pm<br>
                Subject: [Healeys] Overheating<u></u><u></u></span></p>
            <div id=3D"gmail-m_6637601715642283581gmail-m_-7502016643660102=
116yiv7728791887">
              <div>
                <div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">Bob
                        &amp; Mike:</span><span style=3D"font-size:10pt;fon=
t-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u></span></p=
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">You
                        both may have seen my requests on overheating of
                        my BJ8 and the response from the group.=C2=A0 As a
                        result, I purchased an infrared thermometer to
                        determine if my water gauge was giving accurate
                        readings.=C2=A0 The thermometer gun told me that my
                        water gauge was 30 degrees higher than the
                        temperature of the sensor attached to the
                        block.=C2=A0 At the same time, I noticed my gauge
                        will show 120 degrees at rest instead of going
                        down to 90 degrees which would indicate a
                        30-degree high reading.=C2=A0 In May when I leave f=
or
                        cool Michigan, I will send the gauge to Nisonger
                        to be rebuilt.</span><span style=3D"font-size:10pt;=
font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u></span>=
</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">I
                        began to test the temperature of the water going
                        through the cooling system at the inlet to and
                        outlet from the block, inlet and outlet to the
                        radiator and the upper and lower hoses while the
                        engine is running at idle and at 2-3 Thousand
                        rpm.=C2=A0 The chart I created to record these
                        temperatures allowed me to produce observations
                        or averages because the flow of the water is
                        dependent upon the rpms of the engine.=C2=A0 The
                        engine has overheated all of the 40 years I have
                        owned it and has only 1000 miles on the new
                        speedo since rebuilding to 20 over. </span><span st=
yle=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"=
><u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">At
                        the radiator inlet 134 outlet 85 at high rpms
                        with electric fan operating.</span><span style=3D"f=
ont-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u>=
<u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
                        inlet 103 outlet 94 at idle rpms with electric
                        fan operating. </span><span style=3D"font-size:10pt=
;font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u></span=
></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">The
                        above temperatures are recorded at the inlet and
                        all along the hoses.</span><span style=3D"font-size=
:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u><=
/span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">These
                        temperatures indicate the pump is circulating
                        water with sufficient gallons to cool the engine
                        only when the engine is at high rpms.=C2=A0 At idle
                        the pump does not circulate sufficient water to
                        keep the engine cool.=C2=A0 This is especially true
                        when you have been operating the engine at high
                        speed and come down to 30 =E2=80=93 40 mph and stop=
 and
                        go traffic.=C2=A0 Maybe the real answer is to insta=
ll
                        an electric pump for constant cooling water?</span>=
<span style=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:black"><u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">In
                        the past week, I have installed a large Dorman
                        coolant recovery tank and a new 7 psi 1 inch
                        radiator cap because I learned that our
                        radiators have a long neck.=C2=A0 Both those change=
s
                        have reduced my problem of very high overheating
                        and resulting boiling over.=C2=A0 In addition, when
                        my water gauge shows 212 degrees the water
                        temperature is actually 30 degrees less or
                        approximately 185 degrees.=C2=A0 Also, I am not
                        boiling over and loosing coolant.=C2=A0 Nevertheles=
s,
                        the engine water temperature is still spiking to
                        210 plus degrees true when coming off highway
                        speeds.=C2=A0 </span><span style=3D"font-size:10pt;=
font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u></span>=
</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">In
                        my review of various sites, the radiator
                        equipment suppliers and others are recommending
                        increasing the pressure in the classic car
                        systems to 15 psi plus, and coolant recovery
                        tanks =E2=80=9Cif your coolant system, radiator, ho=
ses
                        etc. is new=E2=80=9D and therefore can hold the
                        pressure.=C2=A0 Unfortunately, I have not found any
                        maker of a 1 inch depth x 2.33 inch diameter
                        radiator cap except our 7 psi cap so I can try
                        such a pressurized system.</span><span style=3D"fon=
t-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u=
></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">Another
                        suggestion on an older discussion at the British
                        Car Forum indicated some of the Ontario car
                        owners had switched to Evans Waterless Coolant
                        rather than 50/50 coolant water mixture.</span><spa=
n style=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:bl=
ack"><u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">I
                        still have no idea why a minority of our group
                        has overheating problems.=C2=A0 More ideas?</span><=
span style=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color=
:black"><u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">Regards,</span><span st=
yle=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"=
><u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">Bob
                        Begani 67 BJ8 </span><span style=3D"font-size:10pt;=
font-family:&quot;Arial&quot;,sans-serif;color:black"><u></u><u></u></span>=
</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal"><span style=3D"font-size:14pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:black">=C2=A0</span><span styl=
e=3D"font-size:10pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u><u></u></span></p>
                  </div>
                  <br>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </div>

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</blockquote></div>

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[email-masked]

--===============0278741721504077537==--

---

From: Roger Grace via Healeys <[email-masked]>
Date: Sat, 6 Mar 2021 21:48:28 -0800

--000000000000b46c5f05bcebde03

--000000000000b46c5c05bcebde01
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Pump is the Australian Davies, Craig. Purchased it from Summit in 2018 and
have had it installed for over 2 years now. Paid $188 at the time. Bought
the basic EWP 80 and none of their controllers that they push. No need for
a fancy controller IMO if you are retaining the existing mechanical one and
only using it for traffic duty.  I have a relay and a switch under the dash
that controls the EWP and an electric fan as well. If the engine is really
hot I leave the pump on for a minute or so after shutting down. See link to
the pump manufacturer. Also photo of it installed - not too easy to
distinguish - it is circular and black below the steering column.

https://daviescraig.com/electric-water-pumps

On Sat, Mar 6, 2021 at 7:34 PM <[email-masked]> wrote:

> Roger, I would be very interested in photos and pump details of the
> electric water pump you installed.
>
> -Roland
>
> On Sat, 6 Mar 2021 17:25:24 -0800, you wrote:
>
> My
> >soak too when you shut down the engine and you can see the temp dropping=
.
> not
> >> *To:* [email-masked]; [email-masked]; [email-masked]=
t
> ;
> thermometer
> >> thermometer gun told me that my water gauge was 30 degrees higher than
> the
> >> noticed my gauge will show 120 degrees at rest instead of going down t=
o
> 90
> >> degrees which would indicate a 30-degree high reading.  In May when I
> leave
> the
> >> radiator and the upper and lower hoses while the engine is running at
> idle
> >> and at 2-3 Thousand rpm.  The chart I created to record these
> temperatures
> >> water is dependent upon the rpms of the engine.  The engine has
> overheated
> fan
> sufficient
> >> the pump does not circulate sufficient water to keep the engine cool.
> This
> >> is especially true when you have been operating the engine at high spe=
ed
> >> and come down to 30 =E2=80=93 40 mph and stop and go traffic.  Maybe t=
he real
> >> In the past week, I have installed a large Dorman coolant recovery tan=
k
> >> and a new 7 psi 1 inch radiator cap because I learned that our radiato=
rs
> >> have a long neck.  Both those changes have reduced my problem of very
> high
> >> coolant.  Nevertheless, the engine water temperature is still spiking =
to
> others
> >> psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, =
radiator,
> >> hoses etc. is new=E2=80=9D and therefore can hold the pressure.  Unfor=
tunately,
> I
> >> have not found any maker of a 1 inch depth x 2.33 inch diameter radiat=
or
> >> indicated some of the Ontario car owners had switched to Evans Waterle=
ss
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>

--000000000000b46c5c05bcebde01
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Pump is the Australian Davies, Craig. Purchased it fr=
om Summit in 2018 and have had it installed for over 2 years now. Paid $188=
 at the time. Bought the basic EWP 80 and none of their controllers that th=
ey push. No need for a fancy controller IMO if you are retaining the existi=
ng mechanical one and only using it for traffic duty.=C2=A0 I have a relay =
and a switch under the dash that controls the EWP and an electric fan as we=
ll. If the engine is really hot I leave the pump on for a minute or so afte=
r shutting down. See link to the pump manufacturer. Also photo of it instal=
led - not too easy to distinguish - it is circular and black below the stee=
ring column.<br></div><div><br></div><div><a href=3D"https://daviescraig.co=
m/electric-water-pumps" target=3D"_blank">https://daviescraig.com/electric-=
water-pumps</a></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" =
class=3D"gmail_attr">On Sat, Mar 6, 2021 at 7:34 PM &lt;<a href=3D"mailto:s=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt; wrote=
:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Roger, I would=
 be very interested in photos and pump details of the<br>
electric water pump you installed.<br>
<br>
-Roland<br>
<br>
On Sat, 6 Mar 2021 17:25:24 -0800, you wrote:<br>
<br>
&gt; I concur that at low RPM the flow rate is significantly reduced - as i=
t<br>
&gt;should be with this type of pump - flow is proportional to speed.=C2=A0=
 On my<br>
&gt;BJ8 I measure oil temp and top rad. hose temp plus some other temps. Si=
ngle<br>
&gt;gauge with switches<br>
&gt;So, I added an electric water pump (EWP) that I manually switch on when=
<br>
&gt;approaching traffic. I use the same switch to switch on an electric fan=
. My<br>
&gt;experience is that the EWP is by far better than just an electric fan -=
 you<br>
&gt;need to move the water through the rad. Very noticeable to prevent heat=
<br>
&gt;soak too when you shut down the engine and you can see the temp droppin=
g.<br>
&gt;The EWP goes in the bottom hose and is quite inconspicuous. Took about =
3<br>
&gt;hrs to install. In series with the mechanical pump and literature says<=
br>
&gt;little resistance when off=C2=A0 eg when cruising and RPM higher and EW=
P not<br>
&gt;required.<br>
&gt;Can post photo if anyone is interested plus pump details.<br>
&gt;rg<br>
&gt;<br>
&gt;<br>
&gt;On Sat, Mar 6, 2021 at 4:59 PM Bob Spidell via Healeys &lt;<br>
&gt;<a href=3D"mailto:[email-masked]" target=3D"_blank">healeys@aut=
ox.team.net</a>&gt; wrote:<br>
&gt;<br>
&gt;&gt; Anyone tried a smaller diameter pulley on the pump?<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; On 3/6/2021 4:49 PM, Simon Lachlan via Healeys wrote:<br>
&gt;&gt;<br>
&gt;&gt; Using an original type stat helps too ie the one with a sleeve. He=
lps, not<br>
&gt;&gt; cures all.<br>
&gt;&gt;<br>
&gt;&gt; Simon<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; *From:* Healeys &lt;<a href=3D"mailto:[email-masked]=
et" target=3D"_blank">[email-masked]</a>&gt;<br>
&gt;&gt; &lt;<a href=3D"mailto:[email-masked]" target=3D"_b=
lank">[email-masked]</a>&gt; *On Behalf Of *warthodson--- v=
ia Healeys<br>
&gt;&gt; *Sent:* 06 March 2021 23:41<br>
&gt;&gt; *To:* <a href=3D"mailto:[email-masked]" target=3D"_blank">rfbe=
[email-masked]</a>; <a href=3D"mailto:[email-masked]" target=3D"_b=
lank">[email-masked]</a>; <a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>;<br>
&gt;&gt; <a href=3D"mailto:[email-masked]" target=3D"_blank">healey=
[email-masked]</a><br>
&gt;&gt; *Subject:* Re: [Healeys] Overheating<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; It seems to me that switching from a 7 PSI radiator cap to a 15PSI=
 cap is<br>
&gt;&gt; not a solution to an overheating problem but rather a band-aid.<br=
&gt;&gt; Gary Hodson<br>
&gt;&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: <a href=3D"mailto:[email-masked]" target=3D"_blank">rfbe=
[email-masked]</a><br>
&gt;&gt; To: &#39;Michael Salter&#39; &lt;<a href=3D"mailto:michaelsalter@g=
mail.com" target=3D"_blank">[email-masked]</a>&gt;; &#39;Bob Spide=
ll&#39; &lt;<br>
&gt;&gt; <a href=3D"mailto:[email-masked]" target=3D"_blank">bspidell=
@comcast.net</a>&gt;; &#39;Ahealey help&#39; &lt;<a href=3D"mailto:healeys@=
autox.team.net" target=3D"_blank">[email-masked]</a>&gt;<br>
&gt;&gt; Sent: Sat, Mar 6, 2021 3:58 pm<br>
&gt;&gt; Subject: [Healeys] Overheating<br>
&gt;&gt;<br>
&gt;&gt; Bob &amp; Mike:<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; You both may have seen my requests on overheating of my BJ8 and th=
e<br>
&gt;&gt; response from the group.=C2=A0 As a result, I purchased an infrare=
d thermometer<br>
&gt;&gt; to determine if my water gauge was giving accurate readings.=C2=A0=
 The<br>
&gt;&gt; thermometer gun told me that my water gauge was 30 degrees higher =
than the<br>
&gt;&gt; temperature of the sensor attached to the block.=C2=A0 At the same=
 time, I<br>
&gt;&gt; noticed my gauge will show 120 degrees at rest instead of going do=
wn to 90<br>
&gt;&gt; degrees which would indicate a 30-degree high reading.=C2=A0 In Ma=
y when I leave<br>
&gt;&gt; for cool Michigan, I will send the gauge to Nisonger to be rebuilt=
.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; I began to test the temperature of the water going through the coo=
ling<br>
&gt;&gt; system at the inlet to and outlet from the block, inlet and outlet=
 to the<br>
&gt;&gt; radiator and the upper and lower hoses while the engine is running=
 at idle<br>
&gt;&gt; and at 2-3 Thousand rpm.=C2=A0 The chart I created to record these=
 temperatures<br>
&gt;&gt; allowed me to produce observations or averages because the flow of=
 the<br>
&gt;&gt; water is dependent upon the rpms of the engine.=C2=A0 The engine h=
as overheated<br>
&gt;&gt; all of the 40 years I have owned it and has only 1000 miles on the=
 new<br>
&gt;&gt; speedo since rebuilding to 20 over.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; At the radiator inlet 134 outlet 85 at high rpms with electric fan=
<br>
&gt;&gt; operating.<br>
&gt;&gt;<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0inlet 103 outlet 94 at idle rpms with electric fan<=
br>
&gt;&gt; operating.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; The above temperatures are recorded at the inlet and all along the=
 hoses.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; These temperatures indicate the pump is circulating water with suf=
ficient<br>
&gt;&gt; gallons to cool the engine only when the engine is at high rpms.=
=C2=A0 At idle<br>
&gt;&gt; the pump does not circulate sufficient water to keep the engine co=
ol.=C2=A0 This<br>
&gt;&gt; is especially true when you have been operating the engine at high=
 speed<br>
&gt;&gt; and come down to 30 =E2=80=93 40 mph and stop and go traffic.=C2=
=A0 Maybe the real<br>
&gt;&gt; answer is to install an electric pump for constant cooling water?<=
br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; In the past week, I have installed a large Dorman coolant recovery=
 tank<br>
&gt;&gt; and a new 7 psi 1 inch radiator cap because I learned that our rad=
iators<br>
&gt;&gt; have a long neck.=C2=A0 Both those changes have reduced my problem=
 of very high<br>
&gt;&gt; overheating and resulting boiling over.=C2=A0 In addition, when my=
 water gauge<br>
&gt;&gt; shows 212 degrees the water temperature is actually 30 degrees les=
s or<br>
&gt;&gt; approximately 185 degrees.=C2=A0 Also, I am not boiling over and l=
oosing<br>
&gt;&gt; coolant.=C2=A0 Nevertheless, the engine water temperature is still=
 spiking to<br>
&gt;&gt; 210 plus degrees true when coming off highway speeds.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; In my review of various sites, the radiator equipment suppliers an=
d others<br>
&gt;&gt; are recommending increasing the pressure in the classic car system=
s to 15<br>
&gt;&gt; psi plus, and coolant recovery tanks =E2=80=9Cif your coolant syst=
em, radiator,<br>
&gt;&gt; hoses etc. is new=E2=80=9D and therefore can hold the pressure.=C2=
=A0 Unfortunately, I<br>
&gt;&gt; have not found any maker of a 1 inch depth x 2.33 inch diameter ra=
diator<br>
&gt;&gt; cap except our 7 psi cap so I can try such a pressurized system.<b=
r>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; Another suggestion on an older discussion at the British Car Forum=
<br>
&gt;&gt; indicated some of the Ontario car owners had switched to Evans Wat=
erless<br>
&gt;&gt; Coolant rather than 50/50 coolant water mixture.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; I still have no idea why a minority of our group has overheating<b=
r>
&gt;&gt; problems.=C2=A0 More ideas?<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; Regards,<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; Bob Begani 67 BJ8<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; Support Team.Net <a href=3D"http://www.team.net/donate.html" rel=
=3D"noreferrer" target=3D"_blank">http://www.team.net/donate.html</a><br>
&gt;&gt; Suggested annual donation=C2=A0 $12.75<br>
&gt;&gt;<br>
&gt;&gt; Archive: <a href=3D"http://www.team.net/pipermail/healeys" rel=3D"=
noreferrer" target=3D"_blank">http://www.team.net/pipermail/healeys</a><br>
&gt;&gt; <a href=3D"http://autox.team.net/archive" rel=3D"noreferrer" targe=
t=3D"_blank">http://autox.team.net/archive</a><br>
&gt;&gt;<br>
&gt;&gt; <a href=3D"mailto:[email-masked]" target=3D"_blank">Healey=
[email-masked]</a><br>
&gt;&gt; <a href=3D"http://autox.team.net/mailman/listinfo/healeys" rel=3D"=
noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/healey=
s</a><br>
&gt;&gt;<br>
&gt;&gt; Unsubscribe/Manage:<br>
&gt;&gt; <a href=3D"http://autox.team.net/mailman/options/healeys/roggrace@=
telus.net" rel=3D"noreferrer" target=3D"_blank">http://autox.team.net/mailm=
an/options/healeys/[email-masked]</a><br>
&gt;&gt;<br>
&gt;&gt;<br>
<br>
-- <br>
This email has been checked for viruses by Avast antivirus software.<br>
<a href=3D"https://www.avast.com/antivirus" rel=3D"noreferrer" target=3D"_b=
lank">https://www.avast.com/antivirus</a><br>
<br>
</blockquote></div>

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[email-masked]

--000000000000b46c5f05bcebde03--

---

From: Bob Begani via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 02:43:46 -0500

--===============4376243520814988563==
	boundary="----=_NextPart_000_04BB_01D712FB.B2DD7C70"
Content-Language: en-us

------=_NextPart_000_04BB_01D712FB.B2DD7C70
	charset="utf-8"
Content-Transfer-Encoding: quoted-printable

Roger;

=20

Please send me info on the electric pump and pictures on the =
installation.  Sounds as if it could be a good way to keep the down.  I =
am ready to try any good idea.

=20

I already have a checked everything in the coolant system including the =
original type stat with a sleeve.  In fact, I have several that I bought =
from Kees to try different temperatures.

=20

Mike indicates that the pump with not handle higher pressures over 7 psi =
so I have eliminated that idea.

=20

Thanks, everyone for your ideas.

=20

Bob Begani

=20

From: Healeys <[email-masked]> On Behalf Of Roger Grace =
via Healeys
Sent: Saturday, March 6, 2021 8:25 PM
To: Bob Spidell <[email-masked]>
Cc: Healeys <[email-masked]>
Subject: Re: [Healeys] Overheating

=20

I concur that at low RPM the flow rate is significantly reduced - as it =
should be with this type of pump - flow is proportional to speed.  On my =
BJ8 I measure oil temp and top rad. hose temp plus some other temps. =
Single gauge with switches

So, I added an electric water pump (EWP) that I manually switch on when =
approaching traffic. I use the same switch to switch on an electric fan. =
My experience is that the EWP is by far better than just an electric fan =
- you need to move the water through the rad. Very noticeable to prevent =
heat soak too when you shut down the engine and you can see the temp =
dropping.

The EWP goes in the bottom hose and is quite inconspicuous. Took about 3 =
hrs to install. In series with the mechanical pump and literature says =
little resistance when off  eg when cruising and RPM higher and EWP not =
required.

rg

=20

=20

On Sat, Mar 6, 2021 at 4:59 PM Bob Spidell via Healeys =

Simon

=20

<[email-masked]> On Behalf Of warthodson--- via Healeys
Sent: 06 March 2021 23:41
Subject: Re: [Healeys] Overheating

=20

-----Original Message-----
To: 'Michael Salter' <[email-masked] =
Sent: Sat, Mar 6, 2021 3:58 pm
Subject: [Healeys] Overheating

Bob & Mike:

=20

=20

=20

=20

=20

=20

=20

=20

=20

=20

Regards,

=20

Bob Begani 67 BJ8=20

=20

=20

=20

Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>Roger;<o:p></o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>Please send me =
info on the electric pump and pictures on the installation.=C2=A0 Sounds =
as if it could be a good way to keep the down.=C2=A0 I am ready to try =
any good idea.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>I already have =
a checked everything in the coolant system including the original type =
stat with a sleeve.=C2=A0 In fact, I have several that I bought from =
Kees to try different temperatures.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>Mike indicates =
that the pump with not handle higher pressures over 7 psi so I have =
eliminated that idea.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>Thanks, =
everyone for your ideas.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'>Bob =
Begani<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>From:</b> =
Healeys &lt;[email-masked]&gt; <b>On Behalf Of </b>Roger =
Grace via Healeys<br><b>Sent:</b> Saturday, March 6, 2021 8:25 =
PM<br><b>To:</b> Bob Spidell &lt;[email-masked]&gt;<br><b>Cc:</b> =
Healeys &lt;[email-masked]&gt;<br><b>Subject:</b> Re: [Healeys] =
Overheating<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><div><p =
class=3DMsoNormal>I concur that at low RPM the flow rate is =
significantly reduced - as it should be with this type of pump - flow is =
proportional to speed.&nbsp; On my BJ8 I measure oil temp and top rad. =
hose temp plus some other temps. Single gauge with =
switches<o:p></o:p></p></div><div><p class=3DMsoNormal>So, I added an =
electric water pump (EWP) that I manually switch on when approaching =
traffic. I use the same switch to switch on an electric fan. My =
experience is that the EWP is by far better than just an electric fan - =
you need to move the water through the rad. Very noticeable to prevent =
heat soak too when you shut down the engine and you can see the temp =
dropping.<o:p></o:p></p></div><div><p class=3DMsoNormal>The EWP goes in =
the bottom hose and is quite inconspicuous. Took about 3 hrs to install. =
In series with the mechanical pump and literature says little resistance =
when off&nbsp; eg when cruising and RPM higher and EWP not =
required.<o:p></o:p></p></div><div><p class=3DMsoNormal>Can post photo =
if anyone is interested plus pump details.<o:p></o:p></p></div><div><p =
class=3DMsoNormal>rg<o:p></o:p></p></div></div><div =
id=3D"m_6637601715642283581gmail-m_3013810619985836242DAB4FAD8-2DD7-40BB-=
A1B8-4E2AA1F9FDF2"><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal>On =
Sat, Mar 6, 2021 at 4:59 PM Bob Spidell via Healeys &lt;<a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Anyone tried a smaller diameter pulley on =
the pump?<br><br><o:p></o:p></p><div><p class=3DMsoNormal>On 3/6/2021 =
4:49 PM, Simon Lachlan via Healeys =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Using an =
original type stat helps too ie the one with a sleeve. Helps, not cures =
all.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Simon<o:p></=
o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div style=3D'border:none;border-top:solid windowtext =
1.0pt;padding:3.0pt 0in 0in 0in;border-color:currentcolor =
currentcolor'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:</b>=
 Healeys <a href=3D"mailto:[email-masked]" =
target=3D"_blank">&lt;[email-masked]&gt;</a> <b>On =
Behalf Of </b>warthodson--- via Healeys<br><b>Sent:</b> 06 March 2021 =
23:41<br><b>To:</b> <a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>; <a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>; <a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>; <a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a><br><b>Subject:</b> Re: =
[Healeys] Overheating<o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;margin-bottom:12.0pt'>It seems to me =
that switching from a 7 PSI radiator cap to a 15PSI cap is not a =
solution to an overheating problem but rather a band-aid.&nbsp; =
&nbsp;<br>Gary Hodson<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;margin-bottom:12.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>---=
--Original Message-----<br>From: <a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a><br>To: 'Michael Salter' &lt;<a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt;; 'Bob Spidell' &lt;<a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt;; 'Ahealey help' &lt;<a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt;<br>Sent: Sat, Mar 6, =
2021 3:58 pm<br>Subject: [Healeys] Overheating</span><o:p></o:p></p><div =
id=3D"gmail-m_6637601715642283581gmail-m_-7502016643660102116yiv772879188=
7"><div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Bob=
 &amp; Mike:</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>You=
 both may have seen my requests on overheating of my BJ8 and the =
response from the group.&nbsp; As a result, I purchased an infrared =
thermometer to determine if my water gauge was giving accurate =
readings.&nbsp; The thermometer gun told me that my water gauge was 30 =
degrees higher than the temperature of the sensor attached to the =
block.&nbsp; At the same time, I noticed my gauge will show 120 degrees =
at rest instead of going down to 90 degrees which would indicate a =
30-degree high reading.&nbsp; In May when I leave for cool Michigan, I =
will send the gauge to Nisonger to be =
rebuilt.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>I =
began to test the temperature of the water going through the cooling =
system at the inlet to and outlet from the block, inlet and outlet to =
the radiator and the upper and lower hoses while the engine is running =
at idle and at 2-3 Thousand rpm.&nbsp; The chart I created to record =
these temperatures allowed me to produce observations or averages =
because the flow of the water is dependent upon the rpms of the =
engine.&nbsp; The engine has overheated all of the 40 years I have owned =
it and has only 1000 miles on the new speedo since rebuilding to 20 =
over. </span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>At =
the radiator inlet 134 outlet 85 at high rpms with electric fan =
operating.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inlet 103 =
outlet 94 at idle rpms with electric fan operating. =
</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>The=
 above temperatures are recorded at the inlet and all along the =
hoses.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>The=
se temperatures indicate the pump is circulating water with sufficient =
gallons to cool the engine only when the engine is at high rpms.&nbsp; =
At idle the pump does not circulate sufficient water to keep the engine =
cool.&nbsp; This is especially true when you have been operating the =
engine at high speed and come down to 30 =E2=80=93 40 mph and stop and =
go traffic.&nbsp; Maybe the real answer is to install an electric pump =
for constant cooling water?</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>In =
the past week, I have installed a large Dorman coolant recovery tank and =
a new 7 psi 1 inch radiator cap because I learned that our radiators =
have a long neck.&nbsp; Both those changes have reduced my problem of =
very high overheating and resulting boiling over.&nbsp; In addition, =
when my water gauge shows 212 degrees the water temperature is actually =
30 degrees less or approximately 185 degrees.&nbsp; Also, I am not =
boiling over and loosing coolant.&nbsp; Nevertheless, the engine water =
temperature is still spiking to 210 plus degrees true when coming off =
highway speeds.&nbsp; </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>In =
my review of various sites, the radiator equipment suppliers and others =
are recommending increasing the pressure in the classic car systems to =
15 psi plus, and coolant recovery tanks =E2=80=9Cif your coolant system, =
radiator, hoses etc. is new=E2=80=9D and therefore can hold the =
pressure.&nbsp; Unfortunately, I have not found any maker of a 1 inch =
depth x 2.33 inch diameter radiator cap except our 7 psi cap so I can =
try such a pressurized system.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Ano=
ther suggestion on an older discussion at the British Car Forum =
indicated some of the Ontario car owners had switched to Evans Waterless =
Coolant rather than 50/50 coolant water =
mixture.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>I =
still have no idea why a minority of our group has overheating =
problems.&nbsp; More ideas?</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Reg=
ards,</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>Bob=
 Begani 67 BJ8 </span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:14.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></div></div></div></di=
v></blockquote><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><p =
class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>__________________________________________=
_____<br>Support Team.Net <a href=3D"http://www.team.net/donate.html" =
target=3D"_blank">http://www.team.net/donate.html</a><br>Suggested =
annual donation&nbsp; $12.75<br><br>Archive: <a =
href=3D"http://www.team.net/pipermail/healeys" =
target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a =
href=3D"http://autox.team.net/archive" =
target=3D"_blank">http://autox.team.net/archive</a><br><br><a =
href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a><br><a =
href=3D"http://autox.team.net/mailman/listinfo/healeys" =
target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br><=
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telus.net</a><o:p></o:p></p></blockquote></div></div></body></html>
------=_NextPart_000_04BB_01D712FB.B2DD7C70--

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[email-masked]

--===============4376243520814988563==--

---

From: Leonard Berkowitz via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 15:07:31 +0000

--===============0733663307151966956==
Content-Language: en-US
	boundary="_000_MN2PR13MB3503C0E83FDF68076C84996CB8949MN2PR13MB3503namp_"

--_000_MN2PR13MB3503C0E83FDF68076C84996CB8949MN2PR13MB3503namp_
Content-Transfer-Encoding: quoted-printable

So first step is to make sure your temperature gauge is accurate. If you ar=
e still running hot I solved the problem by adding an additional row to a f=
actory original radiator.  Haven't had any problem with overheating since. =
I had already tried adding an electric fan, an oil cooler and a Texas fan. =
Nothing worked.

________________________________
From: Healeys <[email-masked]> on behalf of rfbegani@gmail.=
com <[email-masked]>
Sent: Saturday, March 6, 2021 4:58 PM
To: 'Michael Salter' <[email-masked]>; 'Bob Spidell' <bspidell@com=
cast.net>; 'Ahealey help' <[email-masked]>
Subject: [Healeys] Overheating

Bob & Mike:

You both may have seen my requests on overheating of my BJ8 and the respons=
e from the group.  As a result, I purchased an infrared thermometer to dete=
rmine if my water gauge was giving accurate readings.  The thermometer gun =
told me that my water gauge was 30 degrees higher than the temperature of t=
he sensor attached to the block.  At the same time, I noticed my gauge will=
 show 120 degrees at rest instead of going down to 90 degrees which would i=
ndicate a 30-degree high reading.  In May when I leave for cool Michigan, I=
 will send the gauge to Nisonger to be rebuilt.

I began to test the temperature of the water going through the cooling syst=
em at the inlet to and outlet from the block, inlet and outlet to the radia=
tor and the upper and lower hoses while the engine is running at idle and a=
t 2-3 Thousand rpm.  The chart I created to record these temperatures allow=
ed me to produce observations or averages because the flow of the water is =
dependent upon the rpms of the engine.  The engine has overheated all of th=
e 40 years I have owned it and has only 1000 miles on the new speedo since =
rebuilding to 20 over.

                        inlet 103 outlet 94 at idle rpms with electric fan =
operating.

These temperatures indicate the pump is circulating water with sufficient g=
allons to cool the engine only when the engine is at high rpms.  At idle th=
e pump does not circulate sufficient water to keep the engine cool.  This i=
s especially true when you have been operating the engine at high speed and=
 come down to 30 =96 40 mph and stop and go traffic.  Maybe the real answer=
 is to install an electric pump for constant cooling water?

In the past week, I have installed a large Dorman coolant recovery tank and=
 a new 7 psi 1 inch radiator cap because I learned that our radiators have =
a long neck.  Both those changes have reduced my problem of very high overh=
eating and resulting boiling over.  In addition, when my water gauge shows =
212 degrees the water temperature is actually 30 degrees less or approximat=
ely 185 degrees.  Also, I am not boiling over and loosing coolant.  Neverth=
eless, the engine water temperature is still spiking to 210 plus degrees tr=
ue when coming off highway speeds.

In my review of various sites, the radiator equipment suppliers and others =
are recommending increasing the pressure in the classic car systems to 15 p=
si plus, and coolant recovery tanks =93if your coolant system, radiator, ho=
ses etc. is new=94 and therefore can hold the pressure.  Unfortunately, I h=
ave not found any maker of a 1 inch depth x 2.33 inch diameter radiator cap=
 except our 7 psi cap so I can try such a pressurized system.

I still have no idea why a minority of our group has overheating problems. =
 More ideas?

Regards,

Bob Begani 67 BJ8

Yes Bob, there is something wrong with our assumptions regarding the coolin=
g system not being "large" enough.

M

M

[email-masked]>> wrote:

Bob

--_000_MN2PR13MB3503C0E83FDF68076C84996CB8949MN2PR13MB3503namp_
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
So first step is to make sure your temperature gauge is accurate. If you ar=
e still running hot I solved the problem by adding an additional row to a f=
actory original radiator. &nbsp;Haven't had any problem with overheating si=
nce. I had already tried adding an electric
 fan, an oil cooler and a Texas fan. Nothing worked.&nbsp;</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif; font-size:12pt; col=
or:rgb(0,0,0)">
<br>
</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Healeys &lt;healeys-b=
[email-masked]&gt; on behalf of [email-masked] &lt;rfbegani@gmai=
l.com&gt;<br>
<b>Sent:</b> Saturday, March 6, 2021 4:58 PM<br>
<b>To:</b> 'Michael Salter' &lt;[email-masked]&gt;; 'Bob Spidell' =
&lt;[email-masked]&gt;; 'Ahealey help' &lt;[email-masked]&gt;=
<br>
<b>Subject:</b> [Healeys] Overheating</font>
<div>&nbsp;</div>
</div>
<div lang=3D"EN-US" style=3D"word-wrap:break-word">
<div class=3D"x_WordSection1">
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
Bob &amp; Mike:</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
You both may have seen my requests on overheating of my BJ8 and the respons=
e from the group.&nbsp; As a result, I purchased an infrared thermometer to=
 determine if my water gauge was giving accurate
 readings.&nbsp; The thermometer gun told me that my water gauge was 30 deg=
rees higher than the temperature of the sensor attached to the block.&nbsp;=
 At the same time, I noticed my gauge will show 120 degrees at rest instead=
 of going down to 90 degrees which would indicate
 a 30-degree high reading.&nbsp; In May when I leave for cool Michigan, I w=
ill send the gauge to Nisonger to be rebuilt.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
I began to test the temperature of the water going through the cooling syst=
em at the inlet to and outlet from the block, inlet and outlet to the radia=
tor and the upper and lower hoses while the
 engine is running at idle and at 2-3 Thousand rpm.&nbsp; The chart I creat=
ed to record these temperatures allowed me to produce observations or avera=
ges because the flow of the water is dependent upon the rpms of the engine.=
&nbsp; The engine has overheated all of the
 40 years I have owned it and has only 1000 miles on the new speedo since r=
ebuilding to 20 over.
</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
At the radiator inlet 134 outlet 85 at high rpms with electric fan operatin=
g.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; inlet 103 o=
utlet 94 at idle rpms with electric fan operating.
</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
The above temperatures are recorded at the inlet and all along the hoses.</=
span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
These temperatures indicate the pump is circulating water with sufficient g=
allons to cool the engine only when the engine is at high rpms.&nbsp; At id=
le the pump does not circulate sufficient water to
 keep the engine cool.&nbsp; This is especially true when you have been ope=
rating the engine at high speed and come down to 30 =96 40 mph and stop and=
 go traffic.&nbsp; Maybe the real answer is to install an electric pump for=
 constant cooling water?</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
In the past week, I have installed a large Dorman coolant recovery tank and=
 a new 7 psi 1 inch radiator cap because I learned that our radiators have =
a long neck.&nbsp; Both those changes have reduced
 my problem of very high overheating and resulting boiling over. &nbsp;In a=
ddition, when my water gauge shows 212 degrees the water temperature is act=
ually 30 degrees less or approximately 185 degrees.&nbsp; Also, I am not bo=
iling over and loosing coolant.&nbsp; Nevertheless,
 the engine water temperature is still spiking to 210 plus degrees true whe=
n coming off highway speeds.&nbsp;
</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
In my review of various sites, the radiator equipment suppliers and others =
are recommending increasing the pressure in the classic car systems to 15 p=
si plus, and coolant recovery tanks =93if your
 coolant system, radiator, hoses etc. is new=94 and therefore can hold the =
pressure.&nbsp; Unfortunately, I have not found any maker of a 1 inch depth=
 x 2.33 inch diameter radiator cap except our 7 psi cap so I can try such a=
 pressurized system.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
Another suggestion on an older discussion at the British Car Forum indicate=
d some of the Ontario car owners had switched to Evans Waterless Coolant ra=
ther than 50/50 coolant water mixture.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
I still have no idea why a minority of our group has overheating problems.&=
nbsp; More ideas?</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
Regards,</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
Bob Begani 67 BJ8 </span>
</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:14.0pt; font-family:&quot;Arial&quot;,sans-serif">=
&nbsp;</span></p>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<b>From:</b> Healeys &lt;[email-masked]&gt; <b>On Behalf Of=
 </b>Michael Salter via Healeys<br>
<b>Sent:</b> Saturday, March 6, 2021 12:20 PM<br>
<b>To:</b> Bob Spidell &lt;[email-masked]&gt;<br>
<b>Cc:</b> [email-masked]<br>
<b>Subject:</b> Re: [Healeys] 100 water pumps</p>
</div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Arial&quot;,sans-serif">=
Yes Bob, there is something wrong with our assumptions regarding the coolin=
g system not being &quot;large&quot; enough.
</span><span style=3D"font-size:12.0pt"></span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Arial&quot;,sans-serif">=
My wifes Maxima is around 300 HP and the radiator has less area than the 10=
0. Certainly it has a couple of very effective electric fans but they reall=
y don't cut in very often unless you have the
 AC on.</span><span style=3D"font-size:12.0pt"></span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Arial&quot;,sans-serif">=
I'm suspicious of the rate of circulation but I've talked to Larry Varley a=
bout this subject and he indicated that increasing the size of the water pu=
mp annular orifice didn't make much difference
 when he tried it.</span><span style=3D"font-size:12.0pt"></span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt">&nbsp;</span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Arial&quot;,sans-serif">=
M</span><span style=3D"font-size:12.0pt; font-family:&quot;Comic Sans MS&qu=
ot;"></span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Comic Sans MS&quot;">&nb=
sp;</span></p>
</div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:12.0pt; font-family:&quot;Comic Sans MS&quot;">M</=
span></p>
</div>
</div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<div>
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
On Sat, Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<a href=3D"mailto:bspidell@=
comcast.net">[email-masked]</a>&gt; wrote:</p>
</div>
<blockquote style=3D"border:none; border-left:solid #CCCCCC 1.0pt; padding:=
0in 0in 0in 6.0pt; margin-left:4.8pt; margin-right:0in">
<div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;margin-right:0in; margin-bottom:12.0pt; margin-left:1=
1.4pt">
I sold my late father's 1955 Thunderbird to my BFF. These cars have a very =
similar problem to Healeys overheating, esp. at idle. When Ford stuffed the=
 292ci Y-Block into the T-Bird, they found the engine was (essentially) too=
 short for the long-hooded car,
 so they 'engineered'--I use the term loosely--a cast iron spacer to move t=
he fan closer to the radiator. The spacer had the added 'benefit' of severe=
ly limiting coolant flow through the pump and radiator; there are some afte=
rmarket fixes and my friend, after
 doing the usual radiator re-core, better fan, etc. installed both a better=
 pump (larger vanes) and a re-engineered spacer. Attached pic is not of the=
 spacer he used--I can't find the link to it--but it shows the general idea=
 (Ford basically put a 'dam' in
 the cooling system to block flow, and the improved spacers mostly remove i=
t). It appears this approach has improved cooling, though the engine probab=
ly still gets warm if it has to sit too long at idle. Link is to one of the=
 improved pumps:<br>
<br>
<a href=3D"https://www.classictbird.com/Water-Pump-Modified-for-Higher-Outp=
ut-1-Per-car/productinfo/8501HO/" target=3D"_blank">https://www.classictbir=
d.com/Water-Pump-Modified-for-Higher-Output-1-Per-car/productinfo/8501HO/</=
a><br>
<br>
Anyways, after doing all the usual stuff to increase cooling, esp. on my BJ=
8, I've wondered if a similar approach would work on Healeys. Their pumps h=
ave very small vanes, and the cavity in which the vanes operate seems prett=
y small for such a large lump of
 cast iron (I'm guessing an uprated radiator core won't help much if the co=
olant flow is still hampered; at least, that's what I've found). This is pr=
obably not an option as, of course, our engines don't have a similar spacer=
 to be improved upon, and it would
 be a major task to increase both the cavity's size and the pump (but I can=
 dream).<br>
<br>
ps. The overheating issue with Healeys is usually attributed to too big of =
an engine in too small of an engine compartment, and too little airflow. Bu=
t, the engine bay in an old T-Bird is huge by comparison--and the engine no=
t terribly larger in displacement--and
 still suffers the same problem.<br>
<br>
Bob </p>
</div>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;margin-bottom:12.0pt">
&nbsp;</p>
</blockquote>
</div>
</div>
</div>
</div>
</body>
</html>

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[email-masked]

--===============0733663307151966956==--

---

From: Harold Manifold via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 14:22:58 -0800

--===============8227142759917094576==
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Like many of you I have been cooped up for the past 12 months waiting for a
vaccine and for life to return to normal. I have been happily occupying my
time doing a complete restoration of a BT7 and had lots of time to consider
what upgrades or modifications are recommended to overcome some of inherent
Healey problems. I come to realize maintaining a consistent temperature of
the cooling water is an issue. With little else to do while in lock down I
looked into the factors that affect cooling to see if it would point to any
obvious upgrades. The design of automobile cooling systems is very
complicated but can be distilled down to a few key factors. Identifying the
factors that have the greatest influence on the system will help to point to
possible solutions or remedies. I will suggest some of the factors may not
be as obvious as others.
 
The job of the cooling system is to remove the engine heat generated. If the
capacity of the cooling system to remove heat (i.e. BTU's or HP) is greater
than the engine heat generated in all situations then the system will reach
a steady state. For most Healey's driving on flat road at 60 MPH when
ambient temperature is less than 80 F everything is in balance. For many
Healey's the situation changes at lower engine RPM's and vehicle speeds.
What are the critical variables that affect the water temperature the
thermostat sees:
 
1. Engine heat generated.
2. Radiator heat transfer coefficient.
3. Air temperature or more importantly the difference between air
temperature and the radiator cooling fin temperature.
4. Water flow rate.
 
At slower engine/vehicle speeds hotter air from the engine bay can surround
the radiator and the water flow rate drops. We can estimate the influence of
each:
 
If the air temperature at the radiator core increases from 80 to 100 deg F
the water temperature will increase approximately 20 deg F. All things being
equal the water temperature will increase approximately 1 deg F per degree
increase in air temperature.
If the water flow rate decreases by 20% the water temperature at the top of
radiator will increase slightly and will drop slightly at bottom of the
radiator.
 
If the water temperature was above the full open temperate of the thermostat
when driving at 60 MPH then the thermostat is no longer controlling the
system and the water temperature will change when one of the critical
variables changes. Often the conclusion is changing thermostats, fans or
using some exotic coolant. I will risk the wrath of this forum and suggest
one of the clues to solving the slow speed problem is look at what is
happening at 60 MPH. If the water temperature is above the thermostat rating
while driving at highway speeds then factors 1 and 2 above are likely the
issue. In other words there is no reserve capacity in the cooling system and
soon as air next to the core gets hotter the water temperature increases.
 
The engine heat generated is a major factor, the less heat the marginal
Healey cooling system has to deal with the better. If the engine heat
generated can be reduced by 20% the water temperature will decrease by 22
deg F. The factors that affect engine heat generated are: losses due to
friction, air/fuel mixture and engine timing. If the air/fuel mixture is too
lean it will cause the engine to generate more heat. A fuel pump that
maintains the minimum required fuel pressure at all engine speeds and well
tuned and jetted carburetors are important. The correct ignition timing and
the mechanical and vacuum advance curves are very important to reduce heat
generated.
 
Lastly we have the radiator heat transfer coefficient. The coefficient is
based on the design of the radiator, number of tubes, rows of tubes, type of
fins, density of fins, area of radiator, materials used to construct the
radiator, etc. The units are BTU/hr/deg F. If some radiator tubes are block
or have reduced flow, if the fins are damaged or fowled with debris, if the
radiator has cracks or spilt seams or if the radiator top tank is not full
the radiator will not perform at its optimum. If in doubt have a radiator
shop boil out the radiator and pressure test.
 
It seems some Healey's don't have a problem with over heating while others
do. One possible explanation is the Healey cooling system is marginal at
best and all of the factors that could affect overheating must be in harmony
with little room for forgiveness.
 
The upgrades I have done are a plastic 5 bladed fan, new stock radiator
core, 123 ignition and bungs on the exhaust for oxygen sensors. Time will
tell if these helped tame the cooling system.
 
I hope this helps and isn't killing a fly with an elephant gun.
 
Harold

 

  _____  

From: Healeys [mailto:[email-masked]] On Behalf Of Leonard
Berkowitz via Healeys
Sent: Sunday, March 07, 2021 7:08 AM
To: [email-masked]
Subject: Re: [Healeys] Overheating

So first step is to make sure your temperature gauge is accurate. If you are
still running hot I solved the problem by adding an additional row to a
factory original radiator.  Haven't had any problem with overheating since.
I had already tried adding an electric fan, an oil cooler and a Texas fan.
Nothing worked. 

  _____  

From: Healeys <[email-masked]> on behalf of
[email-masked] <[email-masked]>
Sent: Saturday, March 6, 2021 4:58 PM
To: 'Michael Salter' <[email-masked]>; 'Bob Spidell'
<[email-masked]>; 'Ahealey help' <[email-masked]>
Subject: [Healeys] Overheating 

Bob & Mike:

You both may have seen my requests on overheating of my BJ8 and the response
from the group.  As a result, I purchased an infrared thermometer to
determine if my water gauge was giving accurate readings.  The thermometer
gun told me that my water gauge was 30 degrees higher than the temperature
of the sensor attached to the block.  At the same time, I noticed my gauge
will show 120 degrees at rest instead of going down to 90 degrees which
would indicate a 30-degree high reading.  In May when I leave for cool
Michigan, I will send the gauge to Nisonger to be rebuilt.

I began to test the temperature of the water going through the cooling
system at the inlet to and outlet from the block, inlet and outlet to the
radiator and the upper and lower hoses while the engine is running at idle
and at 2-3 Thousand rpm.  The chart I created to record these temperatures
allowed me to produce observations or averages because the flow of the water
is dependent upon the rpms of the engine.  The engine has overheated all of
the 40 years I have owned it and has only 1000 miles on the new speedo since
rebuilding to 20 over. 

                        inlet 103 outlet 94 at idle rpms with electric fan
operating. 

These temperatures indicate the pump is circulating water with sufficient
gallons to cool the engine only when the engine is at high rpms.  At idle
the pump does not circulate sufficient water to keep the engine cool.  This
is especially true when you have been operating the engine at high speed and
come down to 30 - 40 mph and stop and go traffic.  Maybe the real answer is
to install an electric pump for constant cooling water?

In the past week, I have installed a large Dorman coolant recovery tank and
a new 7 psi 1 inch radiator cap because I learned that our radiators have a
long neck.  Both those changes have reduced my problem of very high
overheating and resulting boiling over.  In addition, when my water gauge
shows 212 degrees the water temperature is actually 30 degrees less or
approximately 185 degrees.  Also, I am not boiling over and loosing coolant.
Nevertheless, the engine water temperature is still spiking to 210 plus
degrees true when coming off highway speeds.  

In my review of various sites, the radiator equipment suppliers and others
are recommending increasing the pressure in the classic car systems to 15
psi plus, and coolant recovery tanks "if your coolant system, radiator,
hoses etc. is new" and therefore can hold the pressure.  Unfortunately, I
have not found any maker of a 1 inch depth x 2.33 inch diameter radiator cap
except our 7 psi cap so I can try such a pressurized system.

Another suggestion on an older discussion at the British Car Forum indicated
some of the Ontario car owners had switched to Evans Waterless Coolant
rather than 50/50 coolant water mixture.

I still have no idea why a minority of our group has overheating problems.
More ideas?

Regards,

Bob Begani 67 BJ8 

From: Healeys <[email-masked]> On Behalf Of Michael Salter
via Healeys

Yes Bob, there is something wrong with our assumptions regarding the cooling
system not being "large" enough. 

M

M

I sold my late father's 1955 Thunderbird to my BFF. These cars have a very
similar problem to Healeys overheating, esp. at idle. When Ford stuffed the
292ci Y-Block into the T-Bird, they found the engine was (essentially) too
short for the long-hooded car, so they 'engineered'--I use the term
loosely--a cast iron spacer to move the fan closer to the radiator. The
spacer had the added 'benefit' of severely limiting coolant flow through the
pump and radiator; there are some aftermarket fixes and my friend, after
doing the usual radiator re-core, better fan, etc. installed both a better
pump (larger vanes) and a re-engineered spacer. Attached pic is not of the
spacer he used--I can't find the link to it--but it shows the general idea
(Ford basically put a 'dam' in the cooling system to block flow, and the
improved spacers mostly remove it). It appears this approach has improved
cooling, though the engine probably still gets warm if it has to sit too
long at idle. Link is to one of the improved pumps:

https://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per-car
/productinfo/8501HO/

Anyways, after doing all the usual stuff to increase cooling, esp. on my
BJ8, I've wondered if a similar approach would work on Healeys. Their pumps
have very small vanes, and the cavity in which the vanes operate seems
pretty small for such a large lump of cast iron (I'm guessing an uprated
radiator core won't help much if the coolant flow is still hampered; at
least, that's what I've found). This is probably not an option as, of
course, our engines don't have a similar spacer to be improved upon, and it
would be a major task to increase both the cavity's size and the pump (but I
can dream).

ps. The overheating issue with Healeys is usually attributed to too big of
an engine in too small of an engine compartment, and too little airflow.
But, the engine bay in an old T-Bird is huge by comparison--and the engine
not terribly larger in displacement--and still suffers the same problem.

Bob 

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<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Like many of you I have been cooped up for the =
past 12 months=20
waiting for a vaccine and for life to return to normal. I have been =
happily=20
occupying my time doing a complete restoration of a BT7 and had lots of =
time to=20
consider what upgrades or modifications are recommended to overcome some =
of=20
inherent Healey problems. I come to realize maintaining a consistent =
temperature=20
of the cooling water is an issue. With little else to do while in lock =
down I=20
looked into the factors that affect cooling to see if it would point to =
any=20
obvious upgrades. The design of automobile cooling systems is very =
complicated=20
but can&nbsp;be distilled down to a few key factors. Identifying the =
factors=20
that have the greatest influence on the system will help to point to =
possible=20
solutions or remedies. I will suggest some of the factors may not be as =
obvious=20
as others.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>The job of the cooling system is to remove the =
engine heat=20
generated. If the capacity of the cooling system to remove heat (i.e.=20
BTU's&nbsp;or HP) is greater than the engine heat generated in all =
situations=20
then the system will reach a steady state. For most Healey's driving on =
flat=20
road at 60 MPH when&nbsp;ambient temperature is less than 80 F =
everything is in=20
balance. For many Healey's the situation changes at lower engine RPM's =
and=20
vehicle speeds. What are the critical variables that&nbsp;affect the =
water=20
temperature&nbsp;the thermostat sees:</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>1. Engine heat generated.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>2. Radiator heat transfer =
coefficient.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>3. Air temperature or more importantly the =
difference between=20
air temperature and the radiator cooling fin =
temperature.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>4. Water flow rate.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>At slower engine/vehicle speeds hotter air from =
the engine bay=20
can surround the radiator and the water flow rate&nbsp;drops. We can =
estimate=20
the influence of each:</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>If the air temperature at the radiator core =
increases from 80=20
to&nbsp;100 deg F the water temperature will increase approximately=20
2</FONT></SPAN><SPAN class=3D280235719-07032021><FONT color=3D#0000ff =
size=3D2=20
face=3DArial>0 deg F. All things being equal the water temperature will =
increase=20
approximately 1 deg F per degree increase in air=20
temperature.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>If the water flow rate decreases by 20% the water =
temperature=20
at the top of radiator will increase slightly and will drop slightly at =
bottom=20
of the radiator.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>If the water temperature was above the full open =
temperate of=20
the thermostat when&nbsp;driving at 60 MPH then the thermostat is no =
longer=20
controlling the system and the water temperature will&nbsp;change when =
one of=20
the critical variables changes.&nbsp;Often the conclusion is changing=20
thermostats, fans or using some exotic coolant. I will risk the wrath of =
this=20
forum and suggest one of the clues to solving the slow speed problem is =
look at=20
what is happening at 60 MPH. If the water temperature is above the =
thermostat=20
rating while driving at highway speeds then factors 1 and 2 above are =
likely the=20
issue. In other words there is no reserve capacity in the cooling system =
and=20
soon as air next to the core gets hotter the water temperature=20
increases.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>The&nbsp;engine heat generated is a major factor, =
the less=20
heat the marginal Healey cooling system has to deal with the better. If =
the=20
engine heat generated can be reduced by 20% the water temperature will =
decrease=20
by 22 deg F. The factors that affect engine heat generated are: losses =
due to=20
friction, air/fuel mixture and engine timing. If the air/fuel mixture is =
too=20
lean it will cause the engine to generate more heat. A fuel pump that =
maintains=20
the minimum required fuel pressure at all engine speeds and well tuned =
and=20
jetted carburetors are important. The correct ignition timing and the =
mechanical=20
and vacuum advance curves are very important to reduce heat=20
generated.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Lastly we have the radiator heat transfer =
coefficient. The=20
coefficient is based on the design of the radiator, number of tubes, =
rows of=20
tubes, type of fins, density of fins, area of radiator, materials used =
to=20
construct the radiator, etc. The units are BTU/hr/deg F. If some =
radiator tubes=20
are block or have reduced flow, if the fins are damaged or fowled with =
debris,=20
if the radiator has cracks or spilt seams&nbsp;or if the radiator top =
tank is=20
not full the radiator will not perform at its optimum.&nbsp;If in doubt =
have a=20
radiator shop boil out the radiator&nbsp;and pressure =
test.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>It seems some Healey's don't have a problem with =
over heating=20
while others do. One possible explanation is the Healey cooling system =
is=20
marginal at best and all of the factors that could affect overheating =
must=20
be&nbsp;in harmony&nbsp;with&nbsp;little room for=20
forgiveness.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>The upgrades&nbsp;I have done are a plastic 5 =
bladed fan, new=20
stock radiator core, 123 ignition and bungs on the exhaust for oxygen =
sensors.=20
Time will tell if these helped tame the cooling =
system.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>I hope this helps and isn't killing a fly with an =
elephant=20
gun.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Harold</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D280235719-07032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV><BR>
<DIV lang=3Den-us class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>From:</B> Healeys=20
[mailto:[email-masked]] <B>On Behalf Of </B>Leonard =
Berkowitz=20
via Healeys<BR><B>Sent:</B> Sunday, March 07, 2021 7:08 AM<BR><B>To:</B> =

[email-masked]<BR><B>Subject:</B> Re: [Healeys]=20
Overheating<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Calibri, Helvetica, sans-serif; =
COLOR: rgb(0,0,0)">So=20
first step is to make sure your temperature gauge is accurate. If you =
are still=20
running hot I solved the problem by adding an additional row to a =
factory=20
original radiator. &nbsp;Haven't had any problem with overheating since. =
I had=20
already tried adding an electric fan, an oil cooler and a Texas fan. =
Nothing=20
worked.&nbsp;</DIV>
<DIV>
<DIV id=3Dappendonsend></DIV>
<DIV=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Calibri,Helvetica,sans-serif; =
COLOR: rgb(0,0,0)"><BR></DIV>
<HR tabIndex=3D-1 style=3D"WIDTH: 98%; DISPLAY: inline-block">

<DIV id=3DdivRplyFwdMsg dir=3Dltr><FONT style=3D"FONT-SIZE: 11pt" =
color=3D#000000=20
face=3D"Calibri, sans-serif"><B>From:</B> Healeys=20
&lt;[email-masked]&gt; on behalf of [email-masked]=20
&lt;[email-masked]&gt;<BR><B>Sent:</B> Saturday, March 6, 2021 4:58=20
PM<BR><B>To:</B> 'Michael Salter' &lt;[email-masked]&gt;; 'Bob =
Spidell'=20
&lt;[email-masked]&gt;; 'Ahealey help'=20
&lt;[email-masked]&gt;<BR><B>Subject:</B> [Healeys] =
Overheating</FONT>=20
<DIV>&nbsp;</DIV></DIV>
<DIV lang=3DEN-US style=3D"WORD-WRAP: break-word">
<DIV class=3Dx_WordSection1>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Bob &amp;=20
Mike:</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>You both may =
have seen=20
my requests on overheating of my BJ8 and the response from the =
group.&nbsp; As a=20
result, I purchased an infrared thermometer to determine if my water =
gauge was=20
giving accurate readings.&nbsp; The thermometer gun told me that my =
water gauge=20
was 30 degrees higher than the temperature of the sensor attached to the =

block.&nbsp; At the same time, I noticed my gauge will show 120 degrees =
at rest=20
instead of going down to 90 degrees which would indicate a 30-degree =
high=20
reading.&nbsp; In May when I leave for cool Michigan, I will send the =
gauge to=20
Nisonger to be rebuilt.</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>I began to =
test the=20
temperature of the water going through the cooling system at the inlet =
to and=20
outlet from the block, inlet and outlet to the radiator and the upper =
and lower=20
hoses while the engine is running at idle and at 2-3 Thousand rpm.&nbsp; =
The=20
chart I created to record these temperatures allowed me to produce =
observations=20
or averages because the flow of the water is dependent upon the rpms of =
the=20
engine.&nbsp; The engine has overheated all of the 40 years I have owned =
it and=20
has only 1000 miles on the new speedo since rebuilding to 20 over. =
</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>At the =
radiator inlet=20
134 outlet 85 at high rpms with electric fan operating.</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;=20
inlet 103 outlet 94 at idle rpms with electric fan operating. =
</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>The above =
temperatures=20
are recorded at the inlet and all along the hoses.</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>These =
temperatures=20
indicate the pump is circulating water with sufficient gallons to cool =
the=20
engine only when the engine is at high rpms.&nbsp; At idle the pump does =
not=20
circulate sufficient water to keep the engine cool.&nbsp; This is =
especially=20
true when you have been operating the engine at high speed and come down =
to 30 &#8211;=20
40 mph and stop and go traffic.&nbsp; Maybe the real answer is to =
install an=20
electric pump for constant cooling water?</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>In the past =
week, I=20
have installed a large Dorman coolant recovery tank and a new 7 psi 1 =
inch=20
radiator cap because I learned that our radiators have a long =
neck.&nbsp; Both=20
those changes have reduced my problem of very high overheating and =
resulting=20
boiling over. &nbsp;In addition, when my water gauge shows 212 degrees =
the water=20
temperature is actually 30 degrees less or approximately 185 =
degrees.&nbsp;=20
Also, I am not boiling over and loosing coolant.&nbsp; Nevertheless, the =
engine=20
water temperature is still spiking to 210 plus degrees true when coming =
off=20
highway speeds.&nbsp; </SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>In my review =
of various=20
sites, the radiator equipment suppliers and others are recommending =
increasing=20
the pressure in the classic car systems to 15 psi plus, and coolant =
recovery=20
tanks &#8220;if your coolant system, radiator, hoses etc. is new&#8221; =
and therefore can=20
hold the pressure.&nbsp; Unfortunately, I have not found any maker of a =
1 inch=20
depth x 2.33 inch diameter radiator cap except our 7 psi cap so I can =
try such a=20
pressurized system.</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Another =
suggestion on=20
an older discussion at the British Car Forum indicated some of the =
Ontario car=20
owners had switched to Evans Waterless Coolant rather than 50/50 coolant =
water=20
mixture.</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>I still have =
no idea=20
why a minority of our group has overheating problems.&nbsp; More=20
ideas?</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'>Regards,</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Bob Begani 67 =
BJ8=20
</SPAN></P>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
<DIV=20
style=3D"BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; =
BORDER-BOTTOM: medium none; PADDING-BOTTOM: 0in; PADDING-TOP: 3pt; =
PADDING-LEFT: 0in; BORDER-LEFT: medium none; PADDING-RIGHT: 0in">
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><B>From:</B>=20
Healeys &lt;[email-masked]&gt; <B>On Behalf Of =
</B>Michael=20
Salter via Healeys<BR><B>Sent:</B> Saturday, March 6, 2021 12:20=20
PM<BR><B>To:</B> Bob Spidell &lt;[email-masked]&gt;<BR><B>Cc:</B>=20
[email-masked]<BR><B>Subject:</B> Re: [Healeys] 100 water=20
pumps</P></DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in">&nbsp;</P>
<DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>Yes Bob, =
there is=20
something wrong with our assumptions regarding the cooling system not =
being=20
"large" enough. </SPAN><SPAN style=3D"FONT-SIZE: 12pt"></SPAN></P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>My wifes =
Maxima is=20
around 300 HP and the radiator has less area than the 100. Certainly it =
has a=20
couple of very effective electric fans but they really don't cut in very =
often=20
unless you have the AC on.</SPAN><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>I'm =
suspicious of the=20
rate of circulation but I've talked to Larry Varley about this subject =
and he=20
indicated that increasing the size of the water pump annular orifice =
didn't make=20
much difference when he tried it.</SPAN><SPAN=20
style=3D"FONT-SIZE: 12pt"></SPAN></P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D"FONT-SIZE: 12pt"></SPAN>&nbsp;</P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>M</SPAN><SPAN =

style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'></SPAN></P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'></SPAN>&nbsp;</P></DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in"><SPAN=20
style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'>M</SPAN></P></DIV></DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in">&nbsp;</P>
<DIV>
<DIV>
<P class=3Dx_MsoNormal=20
style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in">On Sat,=20
Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<A=20
href=3D"mailto:[email-masked]">[email-masked]</A>&gt; =
wrote:</P></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-TOP: medium none; BORDER-RIGHT: medium none; =
BORDER-BOTTOM: medium none; PADDING-BOTTOM: 0in; PADDING-TOP: 0in; =
PADDING-LEFT: 6pt; MARGIN-LEFT: 4.8pt; BORDER-LEFT: #cccccc 1pt solid; =
PADDING-RIGHT: 0in; MARGIN-RIGHT: 0in">
  <DIV>
  <P class=3Dx_MsoNormal=20
  style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in 0in 12pt 11.4pt">I=20
  sold my late father's 1955 Thunderbird to my BFF. These cars have a =
very=20
  similar problem to Healeys overheating, esp. at idle. When Ford =
stuffed the=20
  292ci Y-Block into the T-Bird, they found the engine was (essentially) =
too=20
  short for the long-hooded car, so they 'engineered'--I use the term =
loosely--a=20
  cast iron spacer to move the fan closer to the radiator. The spacer =
had the=20
  added 'benefit' of severely limiting coolant flow through the pump and =

  radiator; there are some aftermarket fixes and my friend, after doing =
the=20
  usual radiator re-core, better fan, etc. installed both a better pump =
(larger=20
  vanes) and a re-engineered spacer. Attached pic is not of the spacer =
he=20
  used--I can't find the link to it--but it shows the general idea (Ford =

  basically put a 'dam' in the cooling system to block flow, and the =
improved=20
  spacers mostly remove it). It appears this approach has improved =
cooling,=20
  though the engine probably still gets warm if it has to sit too long =
at idle.=20
  Link is to one of the improved pumps:<BR><BR><A=20
  =
href=3D"https://www.classictbird.com/Water-Pump-Modified-for-Higher-Outpu=
t-1-Per-car/productinfo/8501HO/"=20
  =
target=3D_blank>https://www.classictbird.com/Water-Pump-Modified-for-High=
er-Output-1-Per-car/productinfo/8501HO/</A><BR><BR>Anyways,=20
  after doing all the usual stuff to increase cooling, esp. on my BJ8, =
I've=20
  wondered if a similar approach would work on Healeys. Their pumps have =
very=20
  small vanes, and the cavity in which the vanes operate seems pretty =
small for=20
  such a large lump of cast iron (I'm guessing an uprated radiator core =
won't=20
  help much if the coolant flow is still hampered; at least, that's what =
I've=20
  found). This is probably not an option as, of course, our engines =
don't have a=20
  similar spacer to be improved upon, and it would be a major task to =
increase=20
  both the cavity's size and the pump (but I can dream).<BR><BR>ps. The=20
  overheating issue with Healeys is usually attributed to too big of an =
engine=20
  in too small of an engine compartment, and too little airflow. But, =
the engine=20
  bay in an old T-Bird is huge by comparison--and the engine not =
terribly larger=20
  in displacement--and still suffers the same problem.<BR><BR>Bob =
</P></DIV>
  <P class=3Dx_MsoNormal=20
  style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri, sans-serif; MARGIN: =
0in 0in =
12pt">&nbsp;</P></BLOCKQUOTE></DIV></DIV></DIV></DIV></BODY></HTML>

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[email-masked]

--===============8227142759917094576==--

---

From: Michael Salter via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 17:29:29 -0500

--===============3836477078370642176==

--00000000000071b4fd05bcf9da47
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Bob, I think you may be misinterpreting the figures that you quoted

*At the radiator inlet 134 outlet 85 at high rpms with electric fan
operating.*

*                        inlet 103 outlet 94 at idle rpms with electric fan
operating. *

If the water pump is not circulating enough coolant at idle the coolant
will spend considerably more time working its way up through the radiator
tubes than perhaps it should.

To my mind this would mean that there would be more time for the radiator
to transfer heat from the coolant to the air particularly if the electric
fan was operating at the same speed and therefore would exit the radiator
at a considerably lower temperature..

The numbers above indicate that at idle the coolant is exiting the radiator
at a higher temperature than at greater engine RPM, this absolutely does
not make sense in fact, it would indicate that the coolant is passing
through the radiator core considerably more quickly at idle than it is
higher RPM.

I've given this considerable thought and the only conclusion that I can
come to is that either the fan belt is slipping very badly under load or
the water pump impellor is slipping on the pump shaft at higher RPM.

Have you taken a look into the radiator filler neck while the engine is
running. Usually you can see the coolant passing toward the upper hose and
the rate of flow increases as the RPM increases.

Miche be worth a look.

M

.

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is
real
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iator,
ately, I
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s
car/productinfo/8501HO/
ps
it
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e
> not terribly larger in displacement--and still suffers the same problem.

--00000000000071b4fd05bcf9da47
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif"><font size=3D"2"><span style=3D"font-family:arial,sans-se=
rif">Bob, I think you may be misinterpreting the figures that you quoted </=
span><br></font></div><div class=3D"gmail_default" style=3D"font-family:com=
ic sans ms,sans-serif;font-size:small"><font size=3D"2">
</font><p class=3D"MsoNormal"><font size=3D"2"><i><span style=3D"font-famil=
y:&quot;Arial&quot;,sans-serif">At the radiator inlet 134 outlet 85 at high=
 rpms with electric fan operating.</span></i></font></p><p class=3D"MsoNorm=
al"><font size=3D"2"><span style=3D"font-family:&quot;Arial&quot;,sans-seri=
f"><i>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 inlet=
 103 outlet 94 at idle rpms with electric fan operating. </i><br></span></f=
ont></p><p class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-family:=
&quot;Arial&quot;,sans-serif">If the water pump is not circulating enough c=
oolant at idle the coolant will spend considerably more time working its wa=
y up through the radiator tubes than perhaps it should. <br></span></font><=
/p><p class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif">To my mind this would mean that there would be mor=
e time for the radiator to transfer heat from the coolant to the air partic=
ularly if the electric fan was operating at the same speed and therefore wo=
uld exit the radiator at a considerably lower temperature..</span></font></=
p><p class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-family:&quot;=
Arial&quot;,sans-serif">The numbers above indicate that at idle the coolant=
 is exiting the radiator at a higher temperature than at greater engine RPM=
, this absolutely does not make sense in fact, it would indicate that the c=
oolant is passing through the radiator core considerably more quickly at id=
le than it is higher RPM.</span></font></p><p class=3D"MsoNormal"><font siz=
e=3D"2"><span style=3D"font-family:&quot;Arial&quot;,sans-serif">I&#39;ve g=
iven this considerable thought and the only conclusion that I can come to i=
s that either the fan belt is slipping very badly under load or the water p=
ump impellor is slipping on the pump shaft at higher RPM.</span></font></p>=
<p class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-family:&quot;Ar=
ial&quot;,sans-serif">Have you taken a look into the radiator filler neck w=
hile the engine is running. Usually you can see the coolant passing toward =
the upper hose and the rate of flow increases as the RPM increases.</span><=
/font></p><p class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-famil=
y:&quot;Arial&quot;,sans-serif">Miche be worth a look.</span></font></p><p =
class=3D"MsoNormal"><font size=3D"2"><span style=3D"font-family:&quot;Arial=
&quot;,sans-serif"><br></span></font></p><p class=3D"MsoNormal"><font size=
=3D"2"><span style=3D"font-family:&quot;Arial&quot;,sans-serif">M<br></span=
></font></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-famil=
y:&quot;Arial&quot;,sans-serif">. <br></span></p><p class=3D"MsoNormal"><sp=
an style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><br></=
span></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&=
quot;Arial&quot;,sans-serif"><br></span></p><p class=3D"MsoNormal"><span st=
yle=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><br></span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;=
Arial&quot;,sans-serif"><br></span></p>

</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_=
attr">On Sat, Mar 6, 2021 at 4:58 PM &lt;<a href=3D"mailto:[email-masked]=
om" target=3D"_blank">[email-masked]</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div><p class=
=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial&quot;,=
sans-serif">Bob &amp; Mike:<u></u><u></u></span></p><p class=3D"MsoNormal">=
<span style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><u>=
</u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size=
:14pt;font-family:&quot;Arial&quot;,sans-serif">You both may have seen my r=
equests on overheating of my BJ8 and the response from the group.=C2=A0 As =
a result, I purchased an infrared thermometer to determine if my water gaug=
e was giving accurate readings.=C2=A0 The thermometer gun told me that my w=
ater gauge was 30 degrees higher than the temperature of the sensor attache=
d to the block.=C2=A0 At the same time, I noticed my gauge will show 120 de=
grees at rest instead of going down to 90 degrees which would indicate a 30=
-degree high reading.=C2=A0 In May when I leave for cool Michigan, I will s=
end the gauge to Nisonger to be rebuilt.<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial&quot;,=
sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span sty=
le=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">I began to t=
est the temperature of the water going through the cooling system at the in=
let to and outlet from the block, inlet and outlet to the radiator and the =
upper and lower hoses while the engine is running at idle and at 2-3 Thousa=
nd rpm.=C2=A0 The chart I created to record these temperatures allowed me t=
o produce observations or averages because the flow of the water is depende=
nt upon the rpms of the engine.=C2=A0 The engine has overheated all of the =
40 years I have owned it and has only 1000 miles on the new speedo since re=
building to 20 over. <u></u><u></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=
=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14p=
t;font-family:&quot;Arial&quot;,sans-serif">At the radiator inlet 134 outle=
t 85 at high rpms with electric fan operating.<u></u><u></u></span></p><p c=
lass=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial&qu=
ot;,sans-serif">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 inlet 103 outlet 94 at idle rpms with electric fan operating. <u></u=
><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;fon=
t-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p cl=
ass=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial&quo=
t;,sans-serif">The above temperatures are recorded at the inlet and all alo=
ng the hoses.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u><=
/u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-fam=
ily:&quot;Arial&quot;,sans-serif">These temperatures indicate the pump is c=
irculating water with sufficient gallons to cool the engine only when the e=
ngine is at high rpms.=C2=A0 At idle the pump does not circulate sufficient=
 water to keep the engine cool.=C2=A0 This is especially true when you have=
 been operating the engine at high speed and come down to 30 =E2=80=93 40 m=
ph and stop and go traffic.=C2=A0 Maybe the real answer is to install an el=
ectric pump for constant cooling water?<u></u><u></u></span></p><p class=3D=
"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial&quot;,san=
s-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=
=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">In the past we=
ek, I have installed a large Dorman coolant recovery tank and a new 7 psi 1=
 inch radiator cap because I learned that our radiators have a long neck.=
=C2=A0 Both those changes have reduced my problem of very high overheating =
and resulting boiling over.=C2=A0 In addition, when my water gauge shows 21=
2 degrees the water temperature is actually 30 degrees less or approximatel=
y 185 degrees.=C2=A0 Also, I am not boiling over and loosing coolant.=C2=A0=
 Nevertheless, the engine water temperature is still spiking to 210 plus de=
grees true when coming off highway speeds.=C2=A0 <u></u><u></u></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial=
&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">In my=
 review of various sites, the radiator equipment suppliers and others are r=
ecommending increasing the pressure in the classic car systems to 15 psi pl=
us, and coolant recovery tanks =E2=80=9Cif your coolant system, radiator, h=
oses etc. is new=E2=80=9D and therefore can hold the pressure.=C2=A0 Unfort=
unately, I have not found any maker of a 1 inch depth x 2.33 inch diameter =
radiator cap except our 7 psi cap so I can try such a pressurized system.<u=
></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt=
;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial=
&quot;,sans-serif">Another suggestion on an older discussion at the British=
 Car Forum indicated some of the Ontario car owners had switched to Evans W=
aterless Coolant rather than 50/50 coolant water mixture.<u></u><u></u></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&qu=
ot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNo=
rmal"><span style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-seri=
f">I still have no idea why a minority of our group has overheating problem=
s.=C2=A0 More ideas?<u></u><u></u></span></p><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14pt;f=
ont-family:&quot;Arial&quot;,sans-serif">Regards,<u></u><u></u></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14pt;font-family:&quot;Arial=
&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">Bob B=
egani 67 BJ8 <u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u><=
/u></span></p><div style=3D"border-color:rgb(225,225,225) currentcolor curr=
entcolor;border-style:solid none none;border-width:1pt medium medium;paddin=
g:3pt 0in 0in"><p class=3D"MsoNormal"><b>From:</b> Healeys &lt;<a href=3D"m=
ailto:[email-masked]" target=3D"_blank">healeys-bounces@aut=
ox.team.net</a>&gt; <b>On Behalf Of </b>Michael Salter via Healeys<br><b>Se=
nt:</b> Saturday, March 6, 2021 12:20 PM<br><b>To:</b> Bob Spidell &lt;<a h=
ref=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a>&gt;<br><b>Cc:</b> <a href=3D"mailto:[email-masked]" target=3D"_=
blank">[email-masked]</a><br><b>Subject:</b> Re: [Healeys] 100 wate=
r pumps<u></u><u></u></p></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u><=
/p><div><div><p class=3D"MsoNormal"><span style=3D"font-size:12pt;font-fami=
ly:&quot;Arial&quot;,sans-serif">Yes Bob, there is something wrong with our=
 assumptions regarding the cooling system not being &quot;large&quot; enoug=
h. </span><span style=3D"font-size:12pt"><u></u><u></u></span></p></div><di=
v><p class=3D"MsoNormal"><span style=3D"font-size:12pt;font-family:&quot;Ar=
ial&quot;,sans-serif">My wifes Maxima is around 300 HP and the radiator has=
 less area than the 100. Certainly it has a couple of very effective electr=
ic fans but they really don&#39;t cut in very often unless you have the AC =
on.</span><span style=3D"font-size:12pt"><u></u><u></u></span></p></div><di=
v><p class=3D"MsoNormal"><span style=3D"font-size:12pt;font-family:&quot;Ar=
ial&quot;,sans-serif">I&#39;m suspicious of the rate of circulation but I&#=
39;ve talked to Larry Varley about this subject and he indicated that incre=
asing the size of the water pump annular orifice didn&#39;t make much diffe=
rence when he tried it.</span><span style=3D"font-size:12pt"><u></u><u></u>=
</span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:12pt"=
><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span sty=
le=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">M</span><spa=
n style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;"><u></u><u>=
</u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:1=
2pt;font-family:&quot;Comic Sans MS&quot;"><u></u>=C2=A0<u></u></span></p><=
/div><div><p class=3D"MsoNormal"><span style=3D"font-size:12pt;font-family:=
&quot;Comic Sans MS&quot;">M<u></u><u></u></span></p></div></div><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal">On =
Sat, Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<a href=3D"mailto:bspidell@com=
cast.net" target=3D"_blank">[email-masked]</a>&gt; wrote:<u></u><u></=
u></p></div><blockquote style=3D"border-color:currentcolor currentcolor cur=
rentcolor rgb(204,204,204);border-style:none none none solid;border-width:m=
edium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-ri=
ght:0in"><div><p class=3D"MsoNormal" style=3D"margin-right:0in;margin-botto=
m:12pt;margin-left:11.4pt">I sold my late father&#39;s 1955 Thunderbird to =
my BFF. These cars have a very similar problem to Healeys overheating, esp.=
 at idle. When Ford stuffed the 292ci Y-Block into the T-Bird, they found t=
he engine was (essentially) too short for the long-hooded car, so they &#39=
;engineered&#39;--I use the term loosely--a cast iron spacer to move the fa=
n closer to the radiator. The spacer had the added &#39;benefit&#39; of sev=
erely limiting coolant flow through the pump and radiator; there are some a=
ftermarket fixes and my friend, after doing the usual radiator re-core, bet=
ter fan, etc. installed both a better pump (larger vanes) and a re-engineer=
ed spacer. Attached pic is not of the spacer he used--I can&#39;t find the =
link to it--but it shows the general idea (Ford basically put a &#39;dam&#3=
9; in the cooling system to block flow, and the improved spacers mostly rem=
ove it). It appears this approach has improved cooling, though the engine p=
robably still gets warm if it has to sit too long at idle. Link is to one o=
f the improved pumps:<br><br><a href=3D"https://www.classictbird.com/Water-=
Pump-Modified-for-Higher-Output-1-Per-car/productinfo/8501HO/" target=3D"_b=
lank">https://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-=
Per-car/productinfo/8501HO/</a><br><br>Anyways, after doing all the usual s=
tuff to increase cooling, esp. on my BJ8, I&#39;ve wondered if a similar ap=
proach would work on Healeys. Their pumps have very small vanes, and the ca=
vity in which the vanes operate seems pretty small for such a large lump of=
 cast iron (I&#39;m guessing an uprated radiator core won&#39;t help much i=
f the coolant flow is still hampered; at least, that&#39;s what I&#39;ve fo=
und). This is probably not an option as, of course, our engines don&#39;t h=
ave a similar spacer to be improved upon, and it would be a major task to i=
ncrease both the cavity&#39;s size and the pump (but I can dream).<br><br>p=
s. The overheating issue with Healeys is usually attributed to too big of a=
n engine in too small of an engine compartment, and too little airflow. But=
, the engine bay in an old T-Bird is huge by comparison--and the engine not=
 terribly larger in displacement--and still suffers the same problem.<br><b=
r>Bob <u></u><u></u></p></div><p class=3D"MsoNormal" style=3D"margin-bottom=
:12pt"><u></u>=C2=A0<u></u></p></blockquote></div></div></div></blockquote>=
</div>

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[email-masked]

--===============3836477078370642176==--

---

From: Michael Salter via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 17:52:30 -0500

--===============6149625377002564755==

--000000000000bf2e3205bcfa2c57
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Not wanting to nit-pick Harold but I believe that this statement is
incorrect and could result in considerable confusion:
*"If the water flow rate decreases by 20% the water temperature at the top
of radiator will increase slightly and will drop slightly at bottom of the
radiator." *
Coolant exits the engine from the water pump and is pumped to the bottom of
the radiator.
With everything else being equal, a decrease in the rate of flow of the
coolant will result in the coolant staying in the radiator longer thus
allowing more time for the transfer of heat to air.
The result of the slower flow would be a LOWER temperature at the outlet
"top" the radiator assuming of course that the radiator inlet temperature
remains constant.
Of course with slower flow the converse will occur within the engine
because, as there is more time for the heat of the engine block to be
transferred into the coolant, the coolant will be hotter as it exits the
block at the water pump and travels to the radiator inlet "bottom".
We 100 owners think about such things a lot :-)

M

On Sun, Mar 7, 2021 at 5:27 PM Harold Manifold via Healeys <
[email-masked]> wrote:

> Like many of you I have been cooped up for the past 12 months waiting for
> a vaccine and for life to return to normal. I have been happily occupying
> my time doing a complete restoration of a BT7 and had lots of time to
of
> inherent Healey problems. I come to realize maintaining a consistent
> temperature of the cooling water is an issue. With little else to do whil=
e
> in lock down I looked into the factors that affect cooling to see if it
> would point to any obvious upgrades. The design of automobile cooling
> systems is very complicated but can be distilled down to a few key factor=
s.
> Identifying the factors that have the greatest influence on the system wi=
ll
> help to point to possible solutions or remedies. I will suggest some of t=
he
> factors may not be as obvious as others.
>
> The job of the cooling system is to remove the engine heat generated. If
> the capacity of the cooling system to remove heat (i.e. BTU's or HP) is
> greater than the engine heat generated in all situations then the system
> will reach a steady state. For most Healey's driving on flat road at 60 M=
PH
> when ambient temperature is less than 80 F everything is in balance. For
> many Healey's the situation changes at lower engine RPM's and vehicle
> speeds. What are the critical variables that affect the water
> temperature the thermostat sees:
>
> At slower engine/vehicle speeds hotter air from the engine bay can
> surround the radiator and the water flow rate drops. We can estimate the
> influence of each:
>
> If the air temperature at the radiator core increases from 80 to 100 deg =
F
> the water temperature will increase approximately 20 deg F. All things
> being equal the water temperature will increase approximately 1 deg F per
> degree increase in air temperature.
> If the water flow rate decreases by 20% the water temperature at the top
> of radiator will increase slightly and will drop slightly at bottom of th=
e
> radiator.
>
> If the water temperature was above the full open temperate of the
> thermostat when driving at 60 MPH then the thermostat is no longer
> controlling the system and the water temperature will change when one of
> the critical variables changes. Often the conclusion is changing
> thermostats, fans or using some exotic coolant. I will risk the wrath of
> this forum and suggest one of the clues to solving the slow speed problem
> is look at what is happening at 60 MPH. If the water temperature is above
> the thermostat rating while driving at highway speeds then factors 1 and =
2
> above are likely the issue. In other words there is no reserve capacity i=
n
> the cooling system and soon as air next to the core gets hotter the water
> temperature increases.
>
> friction, air/fuel mixture and engine timing. If the air/fuel mixture is
> too lean it will cause the engine to generate more heat. A fuel pump that
> maintains the minimum required fuel pressure at all engine speeds and wel=
l
> tuned and jetted carburetors are important. The correct ignition timing a=
nd
> the mechanical and vacuum advance curves are very important to reduce hea=
t
> based on the design of the radiator, number of tubes, rows of tubes, type
> of fins, density of fins, area of radiator, materials used to construct t=
he
> radiator, etc. The units are BTU/hr/deg F. If some radiator tubes are blo=
ck
> or have reduced flow, if the fins are damaged or fowled with debris, if t=
he
> radiator has cracks or spilt seams or if the radiator top tank is not ful=
l
> It seems some Healey's don't have a problem with over heating while other=
s
> best and all of the factors that could affect overheating must be in
> harmony with little room for forgiveness.
>
> ------------------------------
> *From:* Healeys [mailto:[email-masked]] *On Behalf Of *Le=
onard
> Berkowitz via Healeys
> *Sent:* Sunday, March 07, 2021 7:08 AM
> *To:* [email-masked]
> So first step is to make sure your temperature gauge is accurate. If you
> are still running hot I solved the problem by adding an additional row to=
 a
> factory original radiator.  Haven't had any problem with overheating sinc=
e.
> I had already tried adding an electric fan, an oil cooler and a Texas fan=
.
> Nothing worked.
>
> ------------------------------
> *From:* Healeys <[email-masked]> on behalf of
> *Sent:* Saturday, March 6, 2021 4:58 PM
> *To:* 'Michael Salter' <[email-masked]>; 'Bob Spidell' <
> *Subject:* [Healeys] Overheating
>
>
> Bob & Mike:
>
>
>
r
e
0
ve
e
s
d
n
is
real
h
s
iator,
ately, I
y
he
o
t
h
s
car/productinfo/8501HO/
ps
it
t
f
e
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

--000000000000bf2e3205bcfa2c57
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small"><sp=
an style=3D"font-family:arial,sans-serif">Not wanting to nit-pick Harold bu=
t I believe that this statement is incorrect and could result in considerab=
le confusion:</span></div><div class=3D"gmail_default" style=3D"font-size:s=
mall">
<span style=3D"font-family:arial,sans-serif"><i><font size=3D"2" color=3D"#=
0000ff">&quot;If the water flow rate decreases by 20% the water temperature=
=20
at the top of radiator will increase slightly and will drop slightly at bot=
tom=20
of the radiator.&quot;</font> </i><br></span></div><div class=3D"gmail_defa=
ult" style=3D"font-size:small"><span style=3D"font-family:arial,sans-serif"=
>Coolant exits the engine from the water pump and is pumped to the bottom o=
f the radiator. <br></span></div><div class=3D"gmail_default" style=3D"font=
-size:small"><span style=3D"font-family:arial,sans-serif">With everything e=
lse being equal, a decrease in the rate of flow of the coolant will result =
in the coolant staying in the radiator longer thus allowing more time for t=
he transfer of heat to air. <br></span></div><div class=3D"gmail_default" s=
tyle=3D"font-size:small"><span style=3D"font-family:arial,sans-serif">The r=
esult of the slower flow would be a LOWER temperature at the outlet &quot;t=
op&quot; the radiator assuming of course that the radiator inlet temperatur=
e remains constant. <br></span></div><div class=3D"gmail_default" style=3D"=
font-size:small"><span style=3D"font-family:arial,sans-serif">Of course wit=
h slower flow the converse will occur within the engine because, as there i=
s more time for the heat of the engine block to be transferred into the coo=
lant, the coolant will be hotter as it exits the block at the water pump an=
d travels to the radiator inlet &quot;bottom&quot;.</span></div><div class=
=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-family:ari=
al,sans-serif">We 100 owners think about such things a lot :-)<br></span></=
div><div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"f=
ont-family:arial,sans-serif"><br></span></div><div class=3D"gmail_default" =
style=3D"font-size:small"><span style=3D"font-family:arial,sans-serif">M<br=
></span></div><div class=3D"gmail_default" style=3D"font-family:comic sans =
ms,sans-serif;font-size:small"><br></div></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Mar 7, 2021 at 5:27 PM Har=
old Manifold via Healeys &lt;<a href=3D"mailto:[email-masked]">heal=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex"><u></u>

<div dir=3D"ltr">
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">Like many of you I have been cooped up for the past 12 months=
=20
waiting for a vaccine and for life to return to normal. I have been happily=
=20
occupying my time doing a complete restoration of a BT7 and had lots of tim=
e to=20
consider what upgrades or modifications are recommended to overcome some of=
=20
inherent Healey problems. I come to realize maintaining a consistent temper=
ature=20
of the cooling water is an issue. With little else to do while in lock down=
 I=20
looked into the factors that affect cooling to see if it would point to any=
=20
obvious upgrades. The design of automobile cooling systems is very complica=
ted=20
but can=C2=A0be distilled down to a few key factors. Identifying the factor=
s=20
that have the greatest influence on the system will help to point to possib=
le=20
solutions or remedies. I will suggest some of the factors may not be as obv=
ious=20
as others.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">The job of the cooling system is to remove the engine heat=20
generated. If the capacity of the cooling system to remove heat (i.e.=20
BTU&#39;s=C2=A0or HP) is greater than the engine heat generated in all situ=
ations=20
then the system will reach a steady state. For most Healey&#39;s driving on=
 flat=20
road at 60 MPH when=C2=A0ambient temperature is less than 80 F everything i=
s in=20
balance. For many Healey&#39;s the situation changes at lower engine RPM&#3=
9;s and=20
vehicle speeds. What are the critical variables that=C2=A0affect the water=
=20
temperature=C2=A0the thermostat sees:</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">1. Engine heat generated.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">2. Radiator heat transfer coefficient.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">3. Air temperature or more importantly the difference between=
=20
air temperature and the radiator cooling fin temperature.</font></span></di=
v>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">4. Water flow rate.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">At slower engine/vehicle speeds hotter air from the engine bay=
=20
can surround the radiator and the water flow rate=C2=A0drops. We can estima=
te=20
the influence of each:</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">If the air temperature at the radiator core increases from 80=
=20
to=C2=A0100 deg F the water temperature will increase approximately=20
2</font></span><span><font size=3D"2" face=3D"Arial" color=3D"#0000ff">0 de=
g F. All things being equal the water temperature will increase=20
approximately 1 deg F per degree increase in air=20
temperature.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">If the water flow rate decreases by 20% the water temperature=
=20
at the top of radiator will increase slightly and will drop slightly at bot=
tom=20
of the radiator.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">If the water temperature was above the full open temperate of=
=20
the thermostat when=C2=A0driving at 60 MPH then the thermostat is no longer=
=20
controlling the system and the water temperature will=C2=A0change when one =
of=20
the critical variables changes.=C2=A0Often the conclusion is changing=20
thermostats, fans or using some exotic coolant. I will risk the wrath of th=
is=20
forum and suggest one of the clues to solving the slow speed problem is loo=
k at=20
what is happening at 60 MPH. If the water temperature is above the thermost=
at=20
rating while driving at highway speeds then factors 1 and 2 above are likel=
y the=20
issue. In other words there is no reserve capacity in the cooling system an=
d=20
soon as air next to the core gets hotter the water temperature=20
increases.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">The=C2=A0engine heat generated is a major factor, the less=20
heat the marginal Healey cooling system has to deal with the better. If the=
=20
engine heat generated can be reduced by 20% the water temperature will decr=
ease=20
by 22 deg F. The factors that affect engine heat generated are: losses due =
to=20
friction, air/fuel mixture and engine timing. If the air/fuel mixture is to=
o=20
lean it will cause the engine to generate more heat. A fuel pump that maint=
ains=20
the minimum required fuel pressure at all engine speeds and well tuned and=
=20
jetted carburetors are important. The correct ignition timing and the mecha=
nical=20
and vacuum advance curves are very important to reduce heat=20
generated.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">Lastly we have the radiator heat transfer coefficient. The=20
coefficient is based on the design of the radiator, number of tubes, rows o=
f=20
tubes, type of fins, density of fins, area of radiator, materials used to=
=20
construct the radiator, etc. The units are BTU/hr/deg F. If some radiator t=
ubes=20
are block or have reduced flow, if the fins are damaged or fowled with debr=
is,=20
if the radiator has cracks or spilt seams=C2=A0or if the radiator top tank =
is=20
not full the radiator will not perform at its optimum.=C2=A0If in doubt hav=
e a=20
radiator shop boil out the radiator=C2=A0and pressure test.</font></span></=
div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">It seems some Healey&#39;s don&#39;t have a problem with over =
heating=20
while others do. One possible explanation is the Healey cooling system is=
=20
marginal at best and all of the factors that could affect overheating must=
=20
be=C2=A0in harmony=C2=A0with=C2=A0little room for=20
forgiveness.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">The upgrades=C2=A0I have done are a plastic 5 bladed fan, new=
=20
stock radiator core, 123 ignition and bungs on the exhaust for oxygen senso=
rs.=20
Time will tell if these helped tame the cooling system.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">I hope this helps and isn&#39;t killing a fly with an elephant=
=20
gun.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff">Harold</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font size=3D"2" face=3D"Arial" color=
=3D"#0000ff"></font></span>=C2=A0</div><br>
<div dir=3D"ltr" lang=3D"en-us" align=3D"left">
<hr>
<font size=3D"2" face=3D"Tahoma"><b>From:</b> Healeys=20
[mailto:<a href=3D"mailto:[email-masked]" target=3D"_blank"=
>[email-masked]</a>] <b>On Behalf Of </b>Leonard Berkowitz=
=20
via Healeys<br><b>Sent:</b> Sunday, March 07, 2021 7:08 AM<br><b>To:</b>=20
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
eam.net</a><br><b>Subject:</b> Re: [Healeys]=20
Overheating<br></font><br></div>
<div></div>
<div style=3D"font-size:12pt;font-family:Calibri,Helvetica,sans-serif;color=
:rgb(0,0,0)">So=20
first step is to make sure your temperature gauge is accurate. If you are s=
till=20
running hot I solved the problem by adding an additional row to a factory=
=20
original radiator.=C2=A0 Haven&#39;t had any problem with overheating since=
. I had=20
already tried adding an electric fan, an oil cooler and a Texas fan. Nothin=
g=20
worked.=C2=A0</div>
<div>
<div id=3D"gmail-m_2507401075191523387appendonsend"></div>
<div style=3D"font-size:12pt;font-family:Calibri,Helvetica,sans-serif;color=
:rgb(0,0,0)"><br></div>
<hr style=3D"width:98%;display:inline-block">

<div id=3D"gmail-m_2507401075191523387divRplyFwdMsg" dir=3D"ltr"><font styl=
e=3D"font-size:11pt" face=3D"Calibri, sans-serif" color=3D"#000000"><b>From=
:</b> Healeys=20
&lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">hea=
[email-masked]</a>&gt; on behalf of <a href=3D"mailto:rfbegani=
@gmail.com" target=3D"_blank">[email-masked]</a>=20
&lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">rfbegani@gmail.=
com</a>&gt;<br><b>Sent:</b> Saturday, March 6, 2021 4:58=20
PM<br><b>To:</b> &#39;Michael Salter&#39; &lt;<a href=3D"mailto:michaelsalt=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt;; &#39;Bob S=
pidell&#39;=20
&lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">bspidell@comc=
ast.net</a>&gt;; &#39;Ahealey help&#39;=20
&lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">healeys@aut=
ox.team.net</a>&gt;<br><b>Subject:</b> [Healeys] Overheating</font>=20
<div>=C2=A0</div></div>
<div style=3D"overflow-wrap: break-word;" lang=3D"EN-US">
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">Bob &amp=
;=20
Mike:</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">You both=
 may have seen=20
my requests on overheating of my BJ8 and the response from the group.=C2=A0=
 As a=20
result, I purchased an infrared thermometer to determine if my water gauge =
was=20
giving accurate readings.=C2=A0 The thermometer gun told me that my water g=
auge=20
was 30 degrees higher than the temperature of the sensor attached to the=20
block.=C2=A0 At the same time, I noticed my gauge will show 120 degrees at =
rest=20
instead of going down to 90 degrees which would indicate a 30-degree high=
=20
reading.=C2=A0 In May when I leave for cool Michigan, I will send the gauge=
 to=20
Nisonger to be rebuilt.</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">I began =
to test the=20
temperature of the water going through the cooling system at the inlet to a=
nd=20
outlet from the block, inlet and outlet to the radiator and the upper and l=
ower=20
hoses while the engine is running at idle and at 2-3 Thousand rpm.=C2=A0 Th=
e=20
chart I created to record these temperatures allowed me to produce observat=
ions=20
or averages because the flow of the water is dependent upon the rpms of the=
=20
engine.=C2=A0 The engine has overheated all of the 40 years I have owned it=
 and=20
has only 1000 miles on the new speedo since rebuilding to 20 over. </span><=
/p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">At the r=
adiator inlet=20
134 outlet 85 at high rpms with electric fan operating.</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
inlet 103 outlet 94 at idle rpms with electric fan operating. </span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">The abov=
e temperatures=20
are recorded at the inlet and all along the hoses.</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">These te=
mperatures=20
indicate the pump is circulating water with sufficient gallons to cool the=
=20
engine only when the engine is at high rpms.=C2=A0 At idle the pump does no=
t=20
circulate sufficient water to keep the engine cool.=C2=A0 This is especiall=
y=20
true when you have been operating the engine at high speed and come down to=
 30 =E2=80=93=20
40 mph and stop and go traffic.=C2=A0 Maybe the real answer is to install a=
n=20
electric pump for constant cooling water?</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">In the p=
ast week, I=20
have installed a large Dorman coolant recovery tank and a new 7 psi 1 inch=
=20
radiator cap because I learned that our radiators have a long neck.=C2=A0 B=
oth=20
those changes have reduced my problem of very high overheating and resultin=
g=20
boiling over.=C2=A0 In addition, when my water gauge shows 212 degrees the =
water=20
temperature is actually 30 degrees less or approximately 185 degrees.=C2=A0=
=20
Also, I am not boiling over and loosing coolant.=C2=A0 Nevertheless, the en=
gine=20
water temperature is still spiking to 210 plus degrees true when coming off=
=20
highway speeds.=C2=A0 </span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">In my re=
view of various=20
sites, the radiator equipment suppliers and others are recommending increas=
ing=20
the pressure in the classic car systems to 15 psi plus, and coolant recover=
y=20
tanks =E2=80=9Cif your coolant system, radiator, hoses etc. is new=E2=80=9D=
 and therefore can=20
hold the pressure.=C2=A0 Unfortunately, I have not found any maker of a 1 i=
nch=20
depth x 2.33 inch diameter radiator cap except our 7 psi cap so I can try s=
uch a=20
pressurized system.</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">Another =
suggestion on=20
an older discussion at the British Car Forum indicated some of the Ontario =
car=20
owners had switched to Evans Waterless Coolant rather than 50/50 coolant wa=
ter=20
mixture.</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">I still =
have no idea=20
why a minority of our group has overheating problems.=C2=A0 More=20
ideas?</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">Regards,=
</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif">Bob Bega=
ni 67 BJ8=20
</span></p>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:14pt;font-family:&quot;Arial&quot;,sans-serif"></span>=
=C2=A0</p>
<div style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;borde=
r-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in"=
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><b>Fr=
om:</b>=20
Healeys &lt;<a href=3D"mailto:[email-masked]" target=3D"_bl=
ank">[email-masked]</a>&gt; <b>On Behalf Of </b>Michael=20
Salter via Healeys<br><b>Sent:</b> Saturday, March 6, 2021 12:20=20
PM<br><b>To:</b> Bob Spidell &lt;<a href=3D"mailto:[email-masked]" ta=
rget=3D"_blank">[email-masked]</a>&gt;<br><b>Cc:</b>=20
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
eam.net</a><br><b>Subject:</b> Re: [Healeys] 100 water=20
pumps</p></div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">=C2=
=A0</p>
<div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">Yes Bob,=
 there is=20
something wrong with our assumptions regarding the cooling system not being=
=20
&quot;large&quot; enough. </span><span style=3D"font-size:12pt"></span></p>=
</div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">My wifes=
 Maxima is=20
around 300 HP and the radiator has less area than the 100. Certainly it has=
 a=20
couple of very effective electric fans but they really don&#39;t cut in ver=
y often=20
unless you have the AC on.</span><span style=3D"font-size:12pt"></span></p>=
</div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">I&#39;m =
suspicious of the=20
rate of circulation but I&#39;ve talked to Larry Varley about this subject =
and he=20
indicated that increasing the size of the water pump annular orifice didn&#=
39;t make=20
much difference when he tried it.</span><span style=3D"font-size:12pt"></sp=
an></p></div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt"></span>=C2=A0</p></div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">M</span>=
<span style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;"></span=
></p></div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;"></span>=C2=
=A0</p></div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><span=
 style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;">M</span></p=
></div></div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">=C2=
=A0</p>
<div>
<div>
<p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">On Sa=
t,=20
Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<a href=3D"mailto:bspidell@comcast.=
net" target=3D"_blank">[email-masked]</a>&gt; wrote:</p></div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in 0in =
12pt 11.4pt">I=20
  sold my late father&#39;s 1955 Thunderbird to my BFF. These cars have a v=
ery=20
  similar problem to Healeys overheating, esp. at idle. When Ford stuffed t=
he=20
  292ci Y-Block into the T-Bird, they found the engine was (essentially) to=
o=20
  short for the long-hooded car, so they &#39;engineered&#39;--I use the te=
rm loosely--a=20
  cast iron spacer to move the fan closer to the radiator. The spacer had t=
he=20
  added &#39;benefit&#39; of severely limiting coolant flow through the pum=
p and=20
  radiator; there are some aftermarket fixes and my friend, after doing the=
=20
  usual radiator re-core, better fan, etc. installed both a better pump (la=
rger=20
  vanes) and a re-engineered spacer. Attached pic is not of the spacer he=
=20
  used--I can&#39;t find the link to it--but it shows the general idea (For=
d=20
  basically put a &#39;dam&#39; in the cooling system to block flow, and th=
e improved=20
  spacers mostly remove it). It appears this approach has improved cooling,=
=20
  though the engine probably still gets warm if it has to sit too long at i=
dle.=20
  Link is to one of the improved pumps:<br><br><a href=3D"https://www.class=
ictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per-car/productinfo/850=
1HO/" target=3D"_blank">https://www.classictbird.com/Water-Pump-Modified-fo=
r-Higher-Output-1-Per-car/productinfo/8501HO/</a><br><br>Anyways,=20
  after doing all the usual stuff to increase cooling, esp. on my BJ8, I&#3=
9;ve=20
  wondered if a similar approach would work on Healeys. Their pumps have ve=
ry=20
  small vanes, and the cavity in which the vanes operate seems pretty small=
 for=20
  such a large lump of cast iron (I&#39;m guessing an uprated radiator core=
 won&#39;t=20
  help much if the coolant flow is still hampered; at least, that&#39;s wha=
t I&#39;ve=20
  found). This is probably not an option as, of course, our engines don&#39=
;t have a=20
  similar spacer to be improved upon, and it would be a major task to incre=
ase=20
  both the cavity&#39;s size and the pump (but I can dream).<br><br>ps. The=
=20
  overheating issue with Healeys is usually attributed to too big of an eng=
ine=20
  in too small of an engine compartment, and too little airflow. But, the e=
ngine=20
  bay in an old T-Bird is huge by comparison--and the engine not terribly l=
arger=20
  in displacement--and still suffers the same problem.<br><br>Bob </p></div=
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in 0in =
12pt">=C2=A0</p></blockquote></div></div></div></div></div>
_______________________________________________<br>
rer" target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys" rel=3D"noreferre=
r" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
ttp://autox.team.net/archive" rel=3D"noreferrer" target=3D"_blank">http://a=
utox.team.net/archive</a><br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
eam.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys" rel=3D"noreferre=
r" target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://auto=
x.team.net/mailman/options/healeys/[email-masked]</a><br>
<br>
</blockquote></div>

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[email-masked]

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---

From: Roger Grace via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 16:23:12 -0800

--===============1267153261314052259==

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Bob,
Those numbers you tabled need further investigation. Typically at steady
state the temp diff between in/out of rad is around 10F.
Presume that both tests were done at idle with little heat being generated.
The heat extraction by cooling system is proportional to difference between
ambient air temp and average rad temp.
Increasing flow rate will increase rad output temp and thus inlet will go
down.
I will try to fish out a good description I read a few years ago.
rg

t
r
e
0
ve
e
s
d
n
is
real
h
s
iator,
ately, I
> I still have no idea why a minority of our group has overheating

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<div dir=3D"ltr"><div>Bob,</div><div>Those numbers you tabled need further =
investigation. Typically at steady state the temp diff between in/out of ra=
d is around 10F.</div><div>Presume that both tests were done at idle with l=
ittle heat being generated.<br></div><div>The heat extraction by cooling sy=
stem is proportional to difference between ambient air temp and average rad=
 temp.</div><div>Increasing flow rate will increase rad output temp and thu=
s inlet will go down.<br></div><div>I will try to fish out a good descripti=
on I read a few years ago.</div><div>rg<br></div><div><br></div></div><br><=
div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Mar=
 6, 2021 at 4:59 PM Bob Spidell via Healeys &lt;<a href=3D"mailto:healeys@a=
utox.team.net" target=3D"_blank">[email-masked]</a>&gt; wrote:<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">
 =20
   =20
 =20
  <div>
    Anyone tried a smaller diameter pulley on the pump?<br>
    <br>
    <br>
    <div>On 3/6/2021 4:49 PM, Simon Lachlan via
      Healeys wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
     =20
     =20
      <div>
        <p class=3D"MsoNormal"><span>Using
            an original type stat helps too ie the one with a sleeve.
            Helps, not cures all.<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span>Simon<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
        <div style=3D"border-color:rgb(225,225,225) currentcolor currentcol=
or;border-style:solid none none;border-width:1pt medium medium;padding:3pt =
0cm 0cm">
          <p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><s=
pan lang=3D"EN-US"> Healeys
              <a href=3D"mailto:[email-masked]" target=3D"_=
blank">&lt;[email-masked]&gt;</a> <b>On Behalf Of </b>warth=
odson---
              via Healeys<br>
              <b>Sent:</b> 06 March 2021 23:41<br>
              <b>To:</b> <a href=3D"mailto:[email-masked]" target=3D"_b=
lank">[email-masked]</a>; <a href=3D"mailto:[email-masked]" ta=
rget=3D"_blank">[email-masked]</a>;
              <a href=3D"mailto:[email-masked]" target=3D"_blank">bsp=
[email-masked]</a>; <a href=3D"mailto:[email-masked]" target=3D"=
_blank">[email-masked]</a><br>
              <b>Subject:</b> Re: [Healeys] Overheating<u></u><u></u></span=
        </div>
            <div id=3D"gmail-m_8240319592857340524gmail-m_45552413377591889=
1gmail-m_-943700279356125374yiv7728791887">
                  </div>
                  <div>
                  </div>
                  <div>
                  </div>
                  <div>
                  </div>
                  <div>
                  </div>
                  <div>

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[email-masked]

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---

From: Roger Grace <[email-masked]>
Date: Sun, 7 Mar 2021 16:27:55 -0800

--===============5147470404946313944==

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Gents found what I was looking for ... do read this.
http://www.enginebasics.com/Engine%20Basics%20Root%20Folder/Engine%20Coolin=
g.html
BTW flow direction is out at top.
rg

On Sun, Mar 7, 2021 at 2:53 PM Michael Salter via Healeys <
[email-masked]> wrote:

> *"If the water flow rate decreases by 20% the water temperature at the to=
p
e
> radiator." *
> Coolant exits the engine from the water pump and is pumped to the bottom
> of the radiator.
>> Like many of you I have been cooped up for the past 12 months waiting fo=
r
>> a vaccine and for life to return to normal. I have been happily occupyin=
g
>> consider what upgrades or modifications are recommended to overcome some=
 of
>> temperature of the cooling water is an issue. With little else to do whi=
le
>> systems is very complicated but can be distilled down to a few key facto=
rs.
>> Identifying the factors that have the greatest influence on the system w=
ill
>> help to point to possible solutions or remedies. I will suggest some of =
the
>> will reach a steady state. For most Healey's driving on flat road at 60 =
MPH
>> If the air temperature at the radiator core increases from 80 to 100 deg
>> F the water temperature will increase approximately 20 deg F. All things
>> being equal the water temperature will increase approximately 1 deg F pe=
r
>> of radiator will increase slightly and will drop slightly at bottom of t=
he
>> this forum and suggest one of the clues to solving the slow speed proble=
m
>> is look at what is happening at 60 MPH. If the water temperature is abov=
e
>> the thermostat rating while driving at highway speeds then factors 1 and=
 2
>> above are likely the issue. In other words there is no reserve capacity =
in
>> the cooling system and soon as air next to the core gets hotter the wate=
r
>> generated can be reduced by 20% the water temperature will decrease by 2=
2
>> too lean it will cause the engine to generate more heat. A fuel pump tha=
t
>> maintains the minimum required fuel pressure at all engine speeds and we=
ll
>> tuned and jetted carburetors are important. The correct ignition timing =
and
>> the mechanical and vacuum advance curves are very important to reduce he=
at
>> generated.
>>
>> Lastly we have the radiator heat transfer coefficient. The coefficient i=
s
>> based on the design of the radiator, number of tubes, rows of tubes, typ=
e
>> of fins, density of fins, area of radiator, materials used to construct =
the
>> radiator, etc. The units are BTU/hr/deg F. If some radiator tubes are bl=
ock
>> or have reduced flow, if the fins are damaged or fowled with debris, if =
the
>> radiator has cracks or spilt seams or if the radiator top tank is not fu=
ll
>> the radiator will not perform at its optimum. If in doubt have a radiato=
r
>> It seems some Healey's don't have a problem with over heating while
>> others do. One possible explanation is the Healey cooling system is
>> marginal at best and all of the factors that could affect overheating mu=
st
>> be in harmony with little room for forgiveness.
>>
>> core, 123 ignition and bungs on the exhaust for oxygen sensors. Time wil=
l
>> *From:* Healeys [mailto:[email-masked]] *On Behalf Of *L=
eonard
>> are still running hot I solved the problem by adding an additional row t=
o a
>> factory original radiator.  Haven't had any problem with overheating sin=
ce.
>> I had already tried adding an electric fan, an oil cooler and a Texas fa=
n.
>> response from the group.  As a result, I purchased an infrared thermomet=
er
>> thermometer gun told me that my water gauge was 30 degrees higher than t=
he
>> noticed my gauge will show 120 degrees at rest instead of going down to =
90
>> degrees which would indicate a 30-degree high reading.  In May when I le=
ave
>> system at the inlet to and outlet from the block, inlet and outlet to th=
e
>> radiator and the upper and lower hoses while the engine is running at id=
le
>> and at 2-3 Thousand rpm.  The chart I created to record these temperatur=
es
>> water is dependent upon the rpms of the engine.  The engine has overheat=
ed
>> fan operating.
>> The above temperatures are recorded at the inlet and all along the hoses=
.
>>
>>
>>
>> These temperatures indicate the pump is circulating water with sufficien=
t
>> gallons to cool the engine only when the engine is at high rpms.  At idl=
e
>> the pump does not circulate sufficient water to keep the engine cool.  T=
his
>> and come down to 30 =E2=80=93 40 mph and stop and go traffic.  Maybe the=
 real
>> have a long neck.  Both those changes have reduced my problem of very hi=
gh
>> overheating and resulting boiling over.  In addition, when my water gaug=
e
>> others are recommending increasing the pressure in the classic car syste=
ms
>> to 15 psi plus, and coolant recovery tanks =E2=80=9Cif your coolant syst=
em,
>> radiator, hoses etc. is new=E2=80=9D and therefore can hold the pressure=
.
>> Unfortunately, I have not found any maker of a 1 inch depth x 2.33 inch
>> diameter radiator cap except our 7 psi cap so I can try such a pressuriz=
ed
>> system.
>> I'm suspicious of the rate of circulation but I've talked to Larry Varle=
y
>> about this subject and he indicated that increasing the size of the wate=
r
>> On Sat, Mar 6, 2021 at 11:42 AM Bob Spidell <[email-masked]> wrote=
:
>>
>> I sold my late father's 1955 Thunderbird to my BFF. These cars have a
>> very similar problem to Healeys overheating, esp. at idle. When Ford
>> stuffed the 292ci Y-Block into the T-Bird, they found the engine was
>> (essentially) too short for the long-hooded car, so they 'engineered'--I
>> use the term loosely--a cast iron spacer to move the fan closer to the
>> radiator. The spacer had the added 'benefit' of severely limiting coolan=
t
>> flow through the pump and radiator; there are some aftermarket fixes and=
 my
>> friend, after doing the usual radiator re-core, better fan, etc. install=
ed
>> both a better pump (larger vanes) and a re-engineered spacer. Attached p=
ic
>> is not of the spacer he used--I can't find the link to it--but it shows =
the
>> flow, and the improved spacers mostly remove it). It appears this approa=
ch
>> has improved cooling, though the engine probably still gets warm if it h=
as
>> https://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per=
-car/productinfo/8501HO/
>> BJ8, I've wondered if a similar approach would work on Healeys. Their pu=
mps
>> course, our engines don't have a similar spacer to be improved upon, and=
 it
>> would be a major task to increase both the cavity's size and the pump (b=
ut
>> I can dream).
>>
>> ps. The overheating issue with Healeys is usually attributed to too big
>> of an engine in too small of an engine compartment, and too little airfl=
ow.
>> But, the engine bay in an old T-Bird is huge by comparison--and the engi=
ne
> http://autox.team.net/mailman/options/healeys/[email-masked]

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<div dir=3D"ltr"><div>Gents found what I was looking for ... do read this.<=
/div><div><a href=3D"http://www.enginebasics.com/Engine%20Basics%20Root%20F=
older/Engine%20Cooling.html">http://www.enginebasics.com/Engine%20Basics%20=
Root%20Folder/Engine%20Cooling.html</a></div><div>BTW flow direction is out=
 at top.</div><div>rg<br></div></div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr" class=3D"gmail_attr">On Sun, Mar 7, 2021 at 2:53 PM Michael Salte=
r via Healeys &lt;<a href=3D"mailto:[email-masked]">[email-masked]=
eam.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:sma=
ll"><span style=3D"font-family:arial,sans-serif">Not wanting to nit-pick Ha=
rold but I believe that this statement is incorrect and could result in con=
siderable confusion:</span></div><div class=3D"gmail_default" style=3D"font=
-size:small">
<span style=3D"font-family:arial,sans-serif"><i><font size=3D"2" color=3D"#=
0000ff">&quot;If the water flow rate decreases by 20% the water temperature=
=20
at the top of radiator will increase slightly and will drop slightly at bot=
tom=20
of the radiator.&quot;</font> </i><br></span></div><div class=3D"gmail_defa=
ult" style=3D"font-size:small"><span style=3D"font-family:arial,sans-serif"=
ms,sans-serif;font-size:small"><br></div></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Mar 7, 2021 at 5:27 PM Har=
old Manifold via Healeys &lt;<a href=3D"mailto:[email-masked]" targ=
et=3D"_blank">[email-masked]</a>&gt; wrote:<br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex"><u></u>

<div dir=3D"ltr">
=20
<div id=3D"gmail-m_7583077822617075009gmail-m_2507401075191523387appendonse=
nd"></div>

<div id=3D"gmail-m_7583077822617075009gmail-m_2507401075191523387divRplyFwd=
Msg" dir=3D"ltr"><font style=3D"font-size:11pt" face=3D"Calibri, sans-serif=
" color=3D"#000000"><b>From:</b> Healeys=20
<div lang=3D"EN-US">
<div>

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[email-masked]

--===============5147470404946313944==--

---

From: Harold Manifold via Healeys <[email-masked]>
Date: Sun, 7 Mar 2021 18:02:31 -0800

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Michael,
 
My general model has a lot of assumptions and will be directionally correct
but not exact. I assumed hot water from the engine goes into the top of the
radiator and cooler water exists from the bottom of the radiator. The base
case was a flow rate of 1 US Gal/Min. If there is a better average flow rate
for the AH water pump let me know, I used a SWAG to get the model to work.
If all other factors stay the same and flow rate is reduced to 0.8 GPM the
temperature into the radiator increased by 3 deg F and the temperature
leaving the radiator deceases by 2.6 deg F. I was trying to simulate the
condition when the car slows down and the water pump flow is reduced. If the
flow rate is increased to 1.2 GPM the temperature into the radiator
decreases 2 deg F and the temperate out of the radiator increases 1.7 deg F.
In the model I have the flow rate has the least affect of the four factors.
 
The lower the flow rate the greater the difference between T(in) and T(out)
but T(in) goes up as flow rate goes down.
 
I am the first to admit my model has many assumptions.
 
Does this agree with actual results?
 
Harold

  _____  

From: Michael Salter [mailto:[email-masked]] 
Sent: Sunday, March 07, 2021 2:53 PM
To: Harold Manifold
Cc: Healey List
Subject: Re: [Healeys] Overheating

Not wanting to nit-pick Harold but I believe that this statement is
incorrect and could result in considerable confusion:
"If the water flow rate decreases by 20% the water temperature at the top of
radiator will increase slightly and will drop slightly at bottom of the
radiator." 

M

On Sun, Mar 7, 2021 at 5:27 PM Harold Manifold via Healeys
<[email-masked]> wrote:

 

 

 

 
Harold

 

  _____  

  _____  

Bob & Mike:

Regards,

Bob Begani 67 BJ8 

M

M

Bob 

[email-masked]

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Dus-ascii" =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 11.00.10570.1001"></HEAD>
<BODY>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Michael,</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>My general model has a lot of assumptions and will =

be&nbsp;directionally&nbsp;correct but not exact.&nbsp;I =
assumed&nbsp;hot water=20
from the engine goes into the top of the radiator and cooler water =
exists from=20
the bottom of the radiator. The base case&nbsp;was a flow rate of 1 US =
Gal/Min.=20
If there is a better average flow rate for the AH water pump let me =
know, I used=20
a SWAG to get the model to work. If all other factors stay the same and =
flow=20
rate is reduced to 0.8 GPM the temperature into the radiator increased =
by 3 deg=20
F and the temperature leaving the radiator deceases by 2.6 deg F. I was =
trying=20
to simulate the condition when the car slows down and the water pump =
flow is=20
reduced. If the flow rate is increased to 1.2 GPM the temperature into =
the=20
radiator decreases 2 deg F and the temperate out of the radiator =
increases 1.7=20
deg F. In the model I have the flow rate has the least affect of the =
four=20
factors.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>The&nbsp;lower the flow rate the greater the =
difference=20
between T(in) and T(out) but T(in) goes up as flow rate goes=20
down.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>I am the first to admit my model has many=20
assumptions.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Does this agree with actual =
results?</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D002553901-08032021><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>Harold</FONT></SPAN></DIV><BR>
<DIV lang=3Den-us class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>From:</B> Michael Salter=20
[mailto:[email-masked]] <BR><B>Sent:</B> Sunday, March 07, 2021 =
2:53=20
PM<BR><B>To:</B> Harold Manifold<BR><B>Cc:</B> Healey =
List<BR><B>Subject:</B>=20
Re: [Healeys] Overheating<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=3Dltr>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">Not wanting to nit-pick Harold =
but I=20
believe that this statement is incorrect and could result in =
considerable=20
confusion:</SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif"><I><FONT color=3D#0000ff =
size=3D2>"If the=20
water flow rate decreases by 20% the water temperature at the top of =
radiator=20
will increase slightly and will drop slightly at bottom of the =
radiator."</FONT>=20
</I><BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">Coolant exits the engine from =
the water=20
pump and is pumped to the bottom of the radiator. <BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">With everything else being =
equal, a=20
decrease in the rate of flow of the coolant will result in the coolant =
staying=20
in the radiator longer thus allowing more time for the transfer of heat =
to air.=20
<BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">The result of the slower flow =
would be a=20
LOWER temperature at the outlet "top" the radiator assuming of course =
that the=20
radiator inlet temperature remains constant. <BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">Of course with slower flow the =
converse=20
will occur within the engine because, as there is more time for the heat =
of the=20
engine block to be transferred into the coolant, the coolant will be =
hotter as=20
it exits the block at the water pump and travels to the radiator inlet=20
"bottom".</SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">We 100 owners think about such =
things a=20
lot :-)<BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif"><BR></SPAN></DIV>
<DIV class=3Dgmail_default style=3D"FONT-SIZE: small"><SPAN=20
style=3D"FONT-FAMILY: arial,sans-serif">M<BR></SPAN></DIV>
<DIV class=3Dgmail_default=20
style=3D"FONT-SIZE: small; FONT-FAMILY: comic sans =
ms,sans-serif"><BR></DIV></DIV><BR>
<DIV class=3Dgmail_quote>
<DIV class=3Dgmail_attr dir=3Dltr>On Sun, Mar 7, 2021 at 5:27 PM Harold =
Manifold via=20
Healeys &lt;<A=20
href=3D"mailto:[email-masked]">[email-masked]</A>&gt;=20
wrote:<BR></DIV>
<BLOCKQUOTE class=3Dgmail_quote=20
style=3D"PADDING-LEFT: 1ex; BORDER-LEFT: rgb(204,204,204) 1px solid; =
MARGIN: 0px 0px 0px 0.8ex"><U></U>
  <DIV dir=3Dltr>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>Like many=20
  of you I have been cooped up for the past 12 months waiting for a =
vaccine and=20
  for life to return to normal. I have been happily occupying my time =
doing a=20
  complete restoration of a BT7 and had lots of time to consider what =
upgrades=20
  or modifications are recommended to overcome some of inherent Healey =
problems.=20
  I come to realize maintaining a consistent temperature of the cooling =
water is=20
  an issue. With little else to do while in lock down I looked into the =
factors=20
  that affect cooling to see if it would point to any obvious upgrades. =
The=20
  design of automobile cooling systems is very complicated but =
can&nbsp;be=20
  distilled down to a few key factors. Identifying the factors that have =
the=20
  greatest influence on the system will help to point to possible =
solutions or=20
  remedies. I will suggest some of the factors may not be as obvious as=20
  others.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>The job of=20
  the cooling system is to remove the engine heat generated. If the =
capacity of=20
  the cooling system to remove heat (i.e. BTU's&nbsp;or HP) is greater =
than the=20
  engine heat generated in all situations then the system will reach a =
steady=20
  state. For most Healey's driving on flat road at 60 MPH =
when&nbsp;ambient=20
  temperature is less than 80 F everything is in balance. For many =
Healey's the=20
  situation changes at lower engine RPM's and vehicle speeds. What are =
the=20
  critical variables that&nbsp;affect the water temperature&nbsp;the =
thermostat=20
  sees:</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>1. Engine=20
  heat generated.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>2.=20
  Radiator heat transfer coefficient.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>3. Air=20
  temperature or more importantly the difference between air temperature =
and the=20
  radiator cooling fin temperature.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>4. Water=20
  flow rate.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>At slower=20
  engine/vehicle speeds hotter air from the engine bay can surround the =
radiator=20
  and the water flow rate&nbsp;drops. We can estimate the influence of=20
  each:</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>If the air=20
  temperature at the radiator core increases from 80 to&nbsp;100 deg F =
the water=20
  temperature will increase approximately 2</FONT></SPAN><SPAN><FONT=20
  color=3D#0000ff size=3D2 face=3DArial>0 deg F. All things being equal =
the water=20
  temperature will increase approximately 1 deg F per degree increase in =
air=20
  temperature.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>If the=20
  water flow rate decreases by 20% the water temperature at the top of =
radiator=20
  will increase slightly and will drop slightly at bottom of the=20
  radiator.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>If the=20
  water temperature was above the full open temperate of the thermostat=20
  when&nbsp;driving at 60 MPH then the thermostat is no longer =
controlling the=20
  system and the water temperature will&nbsp;change when one of the =
critical=20
  variables changes.&nbsp;Often the conclusion is changing thermostats, =
fans or=20
  using some exotic coolant. I will risk the wrath of this forum and =
suggest one=20
  of the clues to solving the slow speed problem is look at what is =
happening at=20
  60 MPH. If the water temperature is above the thermostat rating while =
driving=20
  at highway speeds then factors 1 and 2 above are likely the issue. In =
other=20
  words there is no reserve capacity in the cooling system and soon as =
air next=20
  to the core gets hotter the water temperature =
increases.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial>The&nbsp;engine heat generated is a major factor, the =
less heat the=20
  marginal Healey cooling system has to deal with the better. If the =
engine heat=20
  generated can be reduced by 20% the water temperature will decrease by =
22 deg=20
  F. The factors that affect engine heat generated are: losses due to =
friction,=20
  air/fuel mixture and engine timing. If the air/fuel mixture is too =
lean it=20
  will cause the engine to generate more heat. A fuel pump that =
maintains the=20
  minimum required fuel pressure at all engine speeds and well tuned and =
jetted=20
  carburetors are important. The correct ignition timing and the =
mechanical and=20
  vacuum advance curves are very important to reduce heat=20
  generated.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>Lastly we=20
  have the radiator heat transfer coefficient. The coefficient is based =
on the=20
  design of the radiator, number of tubes, rows of tubes, type of fins, =
density=20
  of fins, area of radiator, materials used to construct the radiator, =
etc. The=20
  units are BTU/hr/deg F. If some radiator tubes are block or have =
reduced flow,=20
  if the fins are damaged or fowled with debris, if the radiator has =
cracks or=20
  spilt seams&nbsp;or if the radiator top tank is not full the radiator =
will not=20
  perform at its optimum.&nbsp;If in doubt have a radiator shop boil out =
the=20
  radiator&nbsp;and pressure test.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>It seems=20
  some Healey's don't have a problem with over heating while others do. =
One=20
  possible explanation is the Healey cooling system is marginal at best =
and all=20
  of the factors that could affect overheating must be&nbsp;in=20
  harmony&nbsp;with&nbsp;little room for =
forgiveness.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>The=20
  upgrades&nbsp;I have done are a plastic 5 bladed fan, new stock =
radiator core,=20
  123 ignition and bungs on the exhaust for oxygen sensors. Time will =
tell if=20
  these helped tame the cooling system.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2 =
face=3DArial>I hope=20
  this helps and isn't killing a fly with an elephant =
gun.</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial>Harold</FONT></SPAN></DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><SPAN><FONT color=3D#0000ff size=3D2=20
  face=3DArial></FONT></SPAN>&nbsp;</DIV><BR>
  <DIV lang=3Den-us dir=3Dltr align=3Dleft>
  <HR>
  <FONT size=3D2 face=3DTahoma><B>From:</B> Healeys [mailto:<A=20
  href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>] <B>On Behalf Of =
</B>Leonard=20
  Berkowitz via Healeys<BR><B>Sent:</B> Sunday, March 07, 2021 7:08=20
  AM<BR><B>To:</B> <A href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A><BR><B>Subject:</B> Re: =
[Healeys]=20
  Overheating<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV=20
  style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Calibri,Helvetica,sans-serif; =
COLOR: rgb(0,0,0)">So=20
  first step is to make sure your temperature gauge is accurate. If you =
are=20
  still running hot I solved the problem by adding an additional row to =
a=20
  factory original radiator.&nbsp; Haven't had any problem with =
overheating=20
  since. I had already tried adding an electric fan, an oil cooler and a =
Texas=20
  fan. Nothing worked.&nbsp;</DIV>
  <DIV>
  <DIV id=3Dgmail-m_2507401075191523387appendonsend></DIV>
  <DIV=20
  style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Calibri,Helvetica,sans-serif; =
COLOR: rgb(0,0,0)"><BR></DIV>
  <HR style=3D"WIDTH: 98%; DISPLAY: inline-block">

  <DIV id=3Dgmail-m_2507401075191523387divRplyFwdMsg dir=3Dltr><FONT=20
  style=3D"FONT-SIZE: 11pt" color=3D#000000 face=3D"Calibri, =
sans-serif"><B>From:</B>=20
  Healeys &lt;<A href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt; on behalf of <A =

  href=3D"mailto:[email-masked]" =
target=3D_blank>[email-masked]</A> &lt;<A=20
  href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt;<BR><B>Sent:</B> Saturday, =
March 6,=20
  2021 4:58 PM<BR><B>To:</B> 'Michael Salter' &lt;<A=20
  href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt;; 'Bob Spidell' &lt;<A=20
  href=3D"mailto:[email-masked]" =
target=3D_blank>[email-masked]</A>&gt;;=20
  'Ahealey help' &lt;<A href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt;<BR><B>Subject:</B> =
[Healeys]=20
  Overheating</FONT>=20
  <DIV>&nbsp;</DIV></DIV>
  <DIV lang=3DEN-US style=3D"overflow-wrap: break-word">
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Bob &amp;=20
  Mike:</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>You both =
may have=20
  seen my requests on overheating of my BJ8 and the response from the=20
  group.&nbsp; As a result, I purchased an infrared thermometer to =
determine if=20
  my water gauge was giving accurate readings.&nbsp; The thermometer gun =
told me=20
  that my water gauge was 30 degrees higher than the temperature of the =
sensor=20
  attached to the block.&nbsp; At the same time, I noticed my gauge will =
show=20
  120 degrees at rest instead of going down to 90 degrees which would =
indicate a=20
  30-degree high reading.&nbsp; In May when I leave for cool Michigan, I =
will=20
  send the gauge to Nisonger to be rebuilt.</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>I began to =
test the=20
  temperature of the water going through the cooling system at the inlet =
to and=20
  outlet from the block, inlet and outlet to the radiator and the upper =
and=20
  lower hoses while the engine is running at idle and at 2-3 Thousand =
rpm.&nbsp;=20
  The chart I created to record these temperatures allowed me to produce =

  observations or averages because the flow of the water is dependent =
upon the=20
  rpms of the engine.&nbsp; The engine has overheated all of the 40 =
years I have=20
  owned it and has only 1000 miles on the new speedo since rebuilding to =
20=20
  over. </SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>At the =
radiator inlet=20
  134 outlet 85 at high rpms with electric fan operating.</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;=20
  inlet 103 outlet 94 at idle rpms with electric fan operating. =
</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>The above=20
  temperatures are recorded at the inlet and all along the =
hoses.</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>These =
temperatures=20
  indicate the pump is circulating water with sufficient gallons to cool =
the=20
  engine only when the engine is at high rpms.&nbsp; At idle the pump =
does not=20
  circulate sufficient water to keep the engine cool.&nbsp; This is =
especially=20
  true when you have been operating the engine at high speed and come =
down to 30=20
  &#8211; 40 mph and stop and go traffic.&nbsp; Maybe the real answer is =
to install an=20
  electric pump for constant cooling water?</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>In the past =
week, I=20
  have installed a large Dorman coolant recovery tank and a new 7 psi 1 =
inch=20
  radiator cap because I learned that our radiators have a long =
neck.&nbsp; Both=20
  those changes have reduced my problem of very high overheating and =
resulting=20
  boiling over.&nbsp; In addition, when my water gauge shows 212 degrees =
the=20
  water temperature is actually 30 degrees less or approximately 185=20
  degrees.&nbsp; Also, I am not boiling over and loosing coolant.&nbsp;=20
  Nevertheless, the engine water temperature is still spiking to 210 =
plus=20
  degrees true when coming off highway speeds.&nbsp; </SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>In my =
review of=20
  various sites, the radiator equipment suppliers and others are =
recommending=20
  increasing the pressure in the classic car systems to 15 psi plus, and =
coolant=20
  recovery tanks &#8220;if your coolant system, radiator, hoses etc. is =
new&#8221; and=20
  therefore can hold the pressure.&nbsp; Unfortunately, I have not found =
any=20
  maker of a 1 inch depth x 2.33 inch diameter radiator cap except our 7 =
psi cap=20
  so I can try such a pressurized system.</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Another =
suggestion on=20
  an older discussion at the British Car Forum indicated some of the =
Ontario car=20
  owners had switched to Evans Waterless Coolant rather than 50/50 =
coolant water=20
  mixture.</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>I still =
have no idea=20
  why a minority of our group has overheating problems.&nbsp; More=20
  ideas?</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'>Regards,</SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: "Arial",sans-serif'>Bob Begani =
67 BJ8=20
  </SPAN></P>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 14pt; FONT-FAMILY: =
"Arial",sans-serif'></SPAN>&nbsp;</P>
  <DIV=20
  style=3D"BORDER-TOP: rgb(225,225,225) 1pt solid; BORDER-RIGHT: medium =
none; BORDER-BOTTOM: medium none; PADDING-BOTTOM: 0in; PADDING-TOP: 3pt; =
PADDING-LEFT: 0in; BORDER-LEFT: medium none; PADDING-RIGHT: 0in">
  <P=20
  style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><B>From:</B>=20
  Healeys &lt;<A href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt; <B>On Behalf Of =

  </B>Michael Salter via Healeys<BR><B>Sent:</B> Saturday, March 6, 2021 =
12:20=20
  PM<BR><B>To:</B> Bob Spidell &lt;<A =
href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A>&gt;<BR><B>Cc:</B> <A=20
  href=3D"mailto:[email-masked]"=20
  target=3D_blank>[email-masked]</A><BR><B>Subject:</B> Re: =
[Healeys] 100=20
  water pumps</P></DIV>
  <P=20
  style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in">&nbsp;</P>
  <DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>Yes Bob, =
there is=20
  something wrong with our assumptions regarding the cooling system not =
being=20
  "large" enough. </SPAN><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>My wifes =
Maxima is=20
  around 300 HP and the radiator has less area than the 100. Certainly =
it has a=20
  couple of very effective electric fans but they really don't cut in =
very often=20
  unless you have the AC on.</SPAN><SPAN=20
  style=3D"FONT-SIZE: 12pt"></SPAN></P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Arial",sans-serif'>I'm =
suspicious of the=20
  rate of circulation but I've talked to Larry Varley about this subject =
and he=20
  indicated that increasing the size of the water pump annular orifice =
didn't=20
  make much difference when he tried it.</SPAN><SPAN=20
  style=3D"FONT-SIZE: 12pt"></SPAN></P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D"FONT-SIZE: 12pt"></SPAN>&nbsp;</P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: =
"Arial",sans-serif'>M</SPAN><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'></SPAN></P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'></SPAN>&nbsp;</P></DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in"><SPAN=20
  style=3D'FONT-SIZE: 12pt; FONT-FAMILY: "Comic Sans =
MS"'>M</SPAN></P></DIV></DIV>
  <P=20
  style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in">&nbsp;</P>
  <DIV>
  <DIV>
  <P style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in">On=20
  Sat, Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<A=20
  href=3D"mailto:[email-masked]" =
target=3D_blank>[email-masked]</A>&gt;=20
  wrote:</P></DIV>
  <BLOCKQUOTE=20
  style=3D"BORDER-TOP: medium none; BORDER-RIGHT: medium none; =
BORDER-BOTTOM: medium none; PADDING-BOTTOM: 0in; PADDING-TOP: 0in; =
PADDING-LEFT: 6pt; MARGIN-LEFT: 4.8pt; BORDER-LEFT: 1pt solid; =
PADDING-RIGHT: 0in; MARGIN-RIGHT: 0in">
    <DIV>
    <P=20
    style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in 0in 12pt 11.4pt">I=20
    sold my late father's 1955 Thunderbird to my BFF. These cars have a =
very=20
    similar problem to Healeys overheating, esp. at idle. When Ford =
stuffed the=20
    292ci Y-Block into the T-Bird, they found the engine was =
(essentially) too=20
    short for the long-hooded car, so they 'engineered'--I use the term=20
    loosely--a cast iron spacer to move the fan closer to the radiator. =
The=20
    spacer had the added 'benefit' of severely limiting coolant flow =
through the=20
    pump and radiator; there are some aftermarket fixes and my friend, =
after=20
    doing the usual radiator re-core, better fan, etc. installed both a =
better=20
    pump (larger vanes) and a re-engineered spacer. Attached pic is not =
of the=20
    spacer he used--I can't find the link to it--but it shows the =
general idea=20
    (Ford basically put a 'dam' in the cooling system to block flow, and =
the=20
    improved spacers mostly remove it). It appears this approach has =
improved=20
    cooling, though the engine probably still gets warm if it has to sit =
too=20
    long at idle. Link is to one of the improved pumps:<BR><BR><A=20
    =
href=3D"https://www.classictbird.com/Water-Pump-Modified-for-Higher-Outpu=
t-1-Per-car/productinfo/8501HO/"=20
    =
target=3D_blank>https://www.classictbird.com/Water-Pump-Modified-for-High=
er-Output-1-Per-car/productinfo/8501HO/</A><BR><BR>Anyways,=20
    after doing all the usual stuff to increase cooling, esp. on my BJ8, =
I've=20
    wondered if a similar approach would work on Healeys. Their pumps =
have very=20
    small vanes, and the cavity in which the vanes operate seems pretty =
small=20
    for such a large lump of cast iron (I'm guessing an uprated radiator =
core=20
    won't help much if the coolant flow is still hampered; at least, =
that's what=20
    I've found). This is probably not an option as, of course, our =
engines don't=20
    have a similar spacer to be improved upon, and it would be a major =
task to=20
    increase both the cavity's size and the pump (but I can =
dream).<BR><BR>ps.=20
    The overheating issue with Healeys is usually attributed to too big =
of an=20
    engine in too small of an engine compartment, and too little =
airflow. But,=20
    the engine bay in an old T-Bird is huge by comparison--and the =
engine not=20
    terribly larger in displacement--and still suffers the same=20
    problem.<BR><BR>Bob </P></DIV>
    <P=20
    style=3D"FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; MARGIN: =
0in 0in =
12pt">&nbsp;</P></BLOCKQUOTE></DIV></DIV></DIV></DIV></DIV>______________=
_________________________________<BR>Support=20
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[email-masked]

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---

From: John and Kerry Rowe <[email-masked]>
Date: Mon, 8 Mar 2021 12:16:47 +1000

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I am struggling with Michael's explanation. Everywhere I search, it claims
hot water exits via the Top hose and re-enters as cold water via bottom
hose. That would be why the thermostat is situated at the top of the engine
on the outlet. No doubt someone will correct me if I am wrong.
John Rowe
Qld Australia

On Mon, Mar 8, 2021 at 12:03 PM Harold Manifold via Healeys <
[email-masked]> wrote:

> Michael,
>
> My general model has a lot of assumptions and will
> be directionally correct but not exact. I assumed hot water from the engi=
ne
> goes into the top of the radiator and cooler water exists from the bottom
> of the radiator. The base case was a flow rate of 1 US Gal/Min. If there =
is
> a better average flow rate for the AH water pump let me know, I used a SW=
AG
> to get the model to work. If all other factors stay the same and flow rat=
e
> is reduced to 0.8 GPM the temperature into the radiator increased by 3 de=
g
> F and the temperature leaving the radiator deceases by 2.6 deg F. I was
> trying to simulate the condition when the car slows down and the water pu=
mp
> flow is reduced. If the flow rate is increased to 1.2 GPM the temperature
> into the radiator decreases 2 deg F and the temperate out of the radiator
> increases 1.7 deg F. In the model I have the flow rate has the least affe=
ct
> of the four factors.
>
> The lower the flow rate the greater the difference between T(in) and
> T(out) but T(in) goes up as flow rate goes down.
>
> *From:* Michael Salter [mailto:[email-masked]]
> *Sent:* Sunday, March 07, 2021 2:53 PM
> *To:* Harold Manifold
> *Cc:* Healey List
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> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

--0000000000003645e805bcfd070f
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">I am struggling with Michael&#39;s explanation. Everywhere=
 I search, it claims hot water exits via the Top hose and re-enters as cold=
 water via bottom hose. That would be why the thermostat is situated at the=
 top of the engine on the outlet. No doubt someone will correct me if I am =
wrong.<div>John Rowe</div><div>Qld Australia</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Mar 8, 2021 at 12=
:03 PM Harold Manifold via Healeys &lt;<a href=3D"mailto:[email-masked]=
.net">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex"><u></u>

<div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">Michael,</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">My general model has a lot of assumptions and will=20
be=C2=A0directionally=C2=A0correct but not exact.=C2=A0I assumed=C2=A0hot w=
ater=20
from the engine goes into the top of the radiator and cooler water exists f=
rom=20
the bottom of the radiator. The base case=C2=A0was a flow rate of 1 US Gal/=
Min.=20
If there is a better average flow rate for the AH water pump let me know, I=
 used=20
a SWAG to get the model to work. If all other factors stay the same and flo=
w=20
rate is reduced to 0.8 GPM the temperature into the radiator increased by 3=
 deg=20
F and the temperature leaving the radiator deceases by 2.6 deg F. I was try=
ing=20
to simulate the condition when the car slows down and the water pump flow i=
s=20
reduced. If the flow rate is increased to 1.2 GPM the temperature into the=
=20
radiator decreases 2 deg F and the temperate out of the radiator increases =
1.7=20
deg F. In the model I have the flow rate has the least affect of the four=
=20
factors.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">The=C2=A0lower the flow rate the greater the difference=20
between T(in) and T(out) but T(in) goes up as flow rate goes=20
down.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">I am the first to admit my model has many=20
assumptions.</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">Does this agree with actual results?</font></span></div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial"></font></span>=C2=A0</div>
<div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" fa=
ce=3D"Arial">Harold</font></span></div><br>
<div lang=3D"en-us" dir=3D"ltr" align=3D"left">
<hr>
<font size=3D"2" face=3D"Tahoma"><b>From:</b> Michael Salter=20
[mailto:<a href=3D"mailto:[email-masked]" target=3D"_blank">michae=
[email-masked]</a>] <br><b>Sent:</b> Sunday, March 07, 2021 2:53=20
PM<br><b>To:</b> Harold Manifold<br><b>Cc:</b> Healey List<br><b>Subject:</=
b>=20
Re: [Healeys] Overheating<br></font><br></div>
<div></div>
<div dir=3D"ltr">
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">Not wanting to nit-pick Harold but I=20
believe that this statement is incorrect and could result in considerable=
=20
confusion:</span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif"><i><font color=3D"#0000ff" size=3D"2">&quot;If the=
=20
water flow rate decreases by 20% the water temperature at the top of radiat=
or=20
will increase slightly and will drop slightly at bottom of the radiator.&qu=
ot;</font>=20
</i><br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">Coolant exits the engine from the water=20
pump and is pumped to the bottom of the radiator. <br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">With everything else being equal, a=20
decrease in the rate of flow of the coolant will result in the coolant stay=
ing=20
in the radiator longer thus allowing more time for the transfer of heat to =
air.=20
<br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">The result of the slower flow would be a=20
LOWER temperature at the outlet &quot;top&quot; the radiator assuming of co=
urse that the=20
radiator inlet temperature remains constant. <br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">Of course with slower flow the converse=20
will occur within the engine because, as there is more time for the heat of=
 the=20
engine block to be transferred into the coolant, the coolant will be hotter=
 as=20
it exits the block at the water pump and travels to the radiator inlet=20
&quot;bottom&quot;.</span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">We 100 owners think about such things a=20
lot :-)<br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif"><br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small"><span style=3D"font-=
family:arial,sans-serif">M<br></span></div>
<div class=3D"gmail_default" style=3D"font-size:small;font-family:&quot;com=
ic sans ms&quot;,sans-serif"><br></div></div><br>
<div class=3D"gmail_quote">
<div class=3D"gmail_attr" dir=3D"ltr">On Sun, Mar 7, 2021 at 5:27 PM Harold=
 Manifold via=20
Healeys &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">hea=
[email-masked]</a>&gt;=20
wrote:<br></div>
<blockquote class=3D"gmail_quote" style=3D"padding-left:1ex;border-left:1px=
 solid rgb(204,204,204);margin:0px 0px 0px 0.8ex"><u></u>
  <div dir=3D"ltr">
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">Like many=20
  of you I have been cooped up for the past 12 months waiting for a vaccine=
 and=20
  for life to return to normal. I have been happily occupying my time doing=
 a=20
  complete restoration of a BT7 and had lots of time to consider what upgra=
des=20
  or modifications are recommended to overcome some of inherent Healey prob=
lems.=20
  I come to realize maintaining a consistent temperature of the cooling wat=
er is=20
  an issue. With little else to do while in lock down I looked into the fac=
tors=20
  that affect cooling to see if it would point to any obvious upgrades. The=
=20
  design of automobile cooling systems is very complicated but can=C2=A0be=
=20
  distilled down to a few key factors. Identifying the factors that have th=
e=20
  greatest influence on the system will help to point to possible solutions=
 or=20
  remedies. I will suggest some of the factors may not be as obvious as=20
  others.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">The job of=20
  the cooling system is to remove the engine heat generated. If the capacit=
y of=20
  the cooling system to remove heat (i.e. BTU&#39;s=C2=A0or HP) is greater =
than the=20
  engine heat generated in all situations then the system will reach a stea=
dy=20
  state. For most Healey&#39;s driving on flat road at 60 MPH when=C2=A0amb=
ient=20
  temperature is less than 80 F everything is in balance. For many Healey&#=
39;s the=20
  situation changes at lower engine RPM&#39;s and vehicle speeds. What are =
the=20
  critical variables that=C2=A0affect the water temperature=C2=A0the thermo=
stat=20
  sees:</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">1. Engine=20
  heat generated.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">2.=20
  Radiator heat transfer coefficient.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">3. Air=20
  temperature or more importantly the difference between air temperature an=
d the=20
  radiator cooling fin temperature.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">4. Water=20
  flow rate.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">At slower=20
  engine/vehicle speeds hotter air from the engine bay can surround the rad=
iator=20
  and the water flow rate=C2=A0drops. We can estimate the influence of=20
  each:</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">If the air=20
  temperature at the radiator core increases from 80 to=C2=A0100 deg F the =
water=20
  temperature will increase approximately 2</font></span><span><font color=
=3D"#0000ff" size=3D"2" face=3D"Arial">0 deg F. All things being equal the =
water=20
  temperature will increase approximately 1 deg F per degree increase in ai=
r=20
  temperature.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">If the=20
  water flow rate decreases by 20% the water temperature at the top of radi=
ator=20
  will increase slightly and will drop slightly at bottom of the=20
  radiator.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">If the=20
  water temperature was above the full open temperate of the thermostat=20
  when=C2=A0driving at 60 MPH then the thermostat is no longer controlling =
the=20
  system and the water temperature will=C2=A0change when one of the critica=
l=20
  variables changes.=C2=A0Often the conclusion is changing thermostats, fan=
s or=20
  using some exotic coolant. I will risk the wrath of this forum and sugges=
t one=20
  of the clues to solving the slow speed problem is look at what is happeni=
ng at=20
  60 MPH. If the water temperature is above the thermostat rating while dri=
ving=20
  at highway speeds then factors 1 and 2 above are likely the issue. In oth=
er=20
  words there is no reserve capacity in the cooling system and soon as air =
next=20
  to the core gets hotter the water temperature increases.</font></span></d=
iv>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">The=C2=A0engine heat generated is a major factor, the less h=
eat the=20
  marginal Healey cooling system has to deal with the better. If the engine=
 heat=20
  generated can be reduced by 20% the water temperature will decrease by 22=
 deg=20
  F. The factors that affect engine heat generated are: losses due to frict=
ion,=20
  air/fuel mixture and engine timing. If the air/fuel mixture is too lean i=
t=20
  will cause the engine to generate more heat. A fuel pump that maintains t=
he=20
  minimum required fuel pressure at all engine speeds and well tuned and je=
tted=20
  carburetors are important. The correct ignition timing and the mechanical=
 and=20
  vacuum advance curves are very important to reduce heat=20
  generated.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">Lastly we=20
  have the radiator heat transfer coefficient. The coefficient is based on =
the=20
  design of the radiator, number of tubes, rows of tubes, type of fins, den=
sity=20
  of fins, area of radiator, materials used to construct the radiator, etc.=
 The=20
  units are BTU/hr/deg F. If some radiator tubes are block or have reduced =
flow,=20
  if the fins are damaged or fowled with debris, if the radiator has cracks=
 or=20
  spilt seams=C2=A0or if the radiator top tank is not full the radiator wil=
l not=20
  perform at its optimum.=C2=A0If in doubt have a radiator shop boil out th=
e=20
  radiator=C2=A0and pressure test.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">It seems=20
  some Healey&#39;s don&#39;t have a problem with over heating while others=
 do. One=20
  possible explanation is the Healey cooling system is marginal at best and=
 all=20
  of the factors that could affect overheating must be=C2=A0in=20
  harmony=C2=A0with=C2=A0little room for forgiveness.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">The=20
  upgrades=C2=A0I have done are a plastic 5 bladed fan, new stock radiator =
core,=20
  123 ignition and bungs on the exhaust for oxygen sensors. Time will tell =
if=20
  these helped tame the cooling system.</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">I hope=20
  this helps and isn&#39;t killing a fly with an elephant gun.</font></span=
></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial">Harold</font></span></div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div>
  <div dir=3D"ltr" align=3D"left"><span><font color=3D"#0000ff" size=3D"2" =
face=3D"Arial"></font></span>=C2=A0</div><br>
  <div lang=3D"en-us" dir=3D"ltr" align=3D"left">
  <hr>
  <font size=3D"2" face=3D"Tahoma"><b>From:</b> Healeys [mailto:<a href=3D"=
mailto:[email-masked]" target=3D"_blank">healeys-bounces@au=
tox.team.net</a>] <b>On Behalf Of </b>Leonard=20
  Berkowitz via Healeys<br><b>Sent:</b> Sunday, March 07, 2021 7:08=20
  AM<br><b>To:</b> <a href=3D"mailto:[email-masked]" target=3D"_bla=
nk">[email-masked]</a><br><b>Subject:</b> Re: [Healeys]=20
  Overheating<br></font><br></div>
  <div></div>
  <div style=3D"font-size:12pt;font-family:Calibri,Helvetica,sans-serif;col=
or:rgb(0,0,0)">So=20
  first step is to make sure your temperature gauge is accurate. If you are=
=20
  still running hot I solved the problem by adding an additional row to a=
=20
  factory original radiator.=C2=A0 Haven&#39;t had any problem with overhea=
ting=20
  since. I had already tried adding an electric fan, an oil cooler and a Te=
xas=20
  fan. Nothing worked.=C2=A0</div>
  <div>
  <div id=3D"gmail-m_-2421757166431902946gmail-m_2507401075191523387appendo=
nsend"></div>
  <div style=3D"font-size:12pt;font-family:Calibri,Helvetica,sans-serif;col=
or:rgb(0,0,0)"><br></div>
  <hr style=3D"width:98%;display:inline-block">

  <div id=3D"gmail-m_-2421757166431902946gmail-m_2507401075191523387divRply=
FwdMsg" dir=3D"ltr"><font style=3D"font-size:11pt" color=3D"#000000" face=
=3D"Calibri, sans-serif"><b>From:</b>=20
  Healeys &lt;<a href=3D"mailto:[email-masked]" target=3D"_=
blank">[email-masked]</a>&gt; on behalf of <a href=3D"mailt=
o:[email-masked]" target=3D"_blank">[email-masked]</a> &lt;<a href=
=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;=
<br><b>Sent:</b> Saturday, March 6,=20
  2021 4:58 PM<br><b>To:</b> &#39;Michael Salter&#39; &lt;<a href=3D"mailto=
:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;=
; &#39;Bob Spidell&#39; &lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank">[email-masked]</a>&gt;;=20
  &#39;Ahealey help&#39; &lt;<a href=3D"mailto:[email-masked]" targ=
et=3D"_blank">[email-masked]</a>&gt;<br><b>Subject:</b> [Healeys]=
=20
  Overheating</font>=20
  <div>=C2=A0</div></div>
  <div lang=3D"EN-US">
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">Bob &amp;=20
  Mike:</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">You both may have=
=20
  seen my requests on overheating of my BJ8 and the response from the=20
  group.=C2=A0 As a result, I purchased an infrared thermometer to determin=
e if=20
  my water gauge was giving accurate readings.=C2=A0 The thermometer gun to=
ld me=20
  that my water gauge was 30 degrees higher than the temperature of the sen=
sor=20
  attached to the block.=C2=A0 At the same time, I noticed my gauge will sh=
ow=20
  120 degrees at rest instead of going down to 90 degrees which would indic=
ate a=20
  30-degree high reading.=C2=A0 In May when I leave for cool Michigan, I wi=
ll=20
  send the gauge to Nisonger to be rebuilt.</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">I began to test th=
e=20
  temperature of the water going through the cooling system at the inlet to=
 and=20
  outlet from the block, inlet and outlet to the radiator and the upper and=
=20
  lower hoses while the engine is running at idle and at 2-3 Thousand rpm.=
=C2=A0=20
  The chart I created to record these temperatures allowed me to produce=20
  observations or averages because the flow of the water is dependent upon =
the=20
  rpms of the engine.=C2=A0 The engine has overheated all of the 40 years I=
 have=20
  owned it and has only 1000 miles on the new speedo since rebuilding to 20=
=20
  over. </span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">At the radiator in=
let=20
  134 outlet 85 at high rpms with electric fan operating.</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
  inlet 103 outlet 94 at idle rpms with electric fan operating. </span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">The above=20
  temperatures are recorded at the inlet and all along the hoses.</span></p=
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">These temperatures=
=20
  indicate the pump is circulating water with sufficient gallons to cool th=
e=20
  engine only when the engine is at high rpms.=C2=A0 At idle the pump does =
not=20
  circulate sufficient water to keep the engine cool.=C2=A0 This is especia=
lly=20
  true when you have been operating the engine at high speed and come down =
to 30=20
  =E2=80=93 40 mph and stop and go traffic.=C2=A0 Maybe the real answer is =
to install an=20
  electric pump for constant cooling water?</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">In the past week, =
I=20
  have installed a large Dorman coolant recovery tank and a new 7 psi 1 inc=
h=20
  radiator cap because I learned that our radiators have a long neck.=C2=A0=
 Both=20
  those changes have reduced my problem of very high overheating and result=
ing=20
  boiling over.=C2=A0 In addition, when my water gauge shows 212 degrees th=
e=20
  water temperature is actually 30 degrees less or approximately 185=20
  degrees.=C2=A0 Also, I am not boiling over and loosing coolant.=C2=A0=20
  Nevertheless, the engine water temperature is still spiking to 210 plus=
=20
  degrees true when coming off highway speeds.=C2=A0 </span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">In my review of=20
  various sites, the radiator equipment suppliers and others are recommendi=
ng=20
  increasing the pressure in the classic car systems to 15 psi plus, and co=
olant=20
  recovery tanks =E2=80=9Cif your coolant system, radiator, hoses etc. is n=
ew=E2=80=9D and=20
  therefore can hold the pressure.=C2=A0 Unfortunately, I have not found an=
y=20
  maker of a 1 inch depth x 2.33 inch diameter radiator cap except our 7 ps=
i cap=20
  so I can try such a pressurized system.</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">Another suggestion=
 on=20
  an older discussion at the British Car Forum indicated some of the Ontari=
o car=20
  owners had switched to Evans Waterless Coolant rather than 50/50 coolant =
water=20
  mixture.</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">I still have no id=
ea=20
  why a minority of our group has overheating problems.=C2=A0 More=20
  ideas?</span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">Regards,</span></p=
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif">Bob Begani 67 BJ8=
=20
  </span></p>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:14pt;font-family:Arial,sans-serif"></span>=C2=A0</p>
  <div style=3D"border-width:1pt medium medium;border-style:solid none none=
;border-top-color:rgb(225,225,225);border-right-color:initial;border-bottom=
-color:initial;padding:3pt 0in 0in;border-left-color:initial">
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><b>=
From:</b>=20
  Healeys &lt;<a href=3D"mailto:[email-masked]" target=3D"_=
blank">[email-masked]</a>&gt; <b>On Behalf Of=20
  </b>Michael Salter via Healeys<br><b>Sent:</b> Saturday, March 6, 2021 12=
:20=20
  PM<br><b>To:</b> Bob Spidell &lt;<a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt;<br><b>Cc:</b> <a href=3D"mai=
lto:[email-masked]" target=3D"_blank">[email-masked]</a><br=
><b>Subject:</b> Re: [Healeys] 100=20
  water pumps</p></div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">=C2=
=A0</p>
  <div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:Arial,sans-serif">Yes Bob, there is=
=20
  something wrong with our assumptions regarding the cooling system not bei=
ng=20
  &quot;large&quot; enough. </span><span style=3D"font-size:12pt"></span></=
p></div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:Arial,sans-serif">My wifes Maxima is=
=20
  around 300 HP and the radiator has less area than the 100. Certainly it h=
as a=20
  couple of very effective electric fans but they really don&#39;t cut in v=
ery often=20
  unless you have the AC on.</span><span style=3D"font-size:12pt"></span></=
p></div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:Arial,sans-serif">I&#39;m suspicious=
 of the=20
  rate of circulation but I&#39;ve talked to Larry Varley about this subjec=
t and he=20
  indicated that increasing the size of the water pump annular orifice didn=
&#39;t=20
  make much difference when he tried it.</span><span style=3D"font-size:12p=
t"></span></p></div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt"></span>=C2=A0</p></div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:Arial,sans-serif">M</span><span styl=
e=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;"></span></p></div=
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;"></span>=
=C2=A0</p></div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in"><sp=
an style=3D"font-size:12pt;font-family:&quot;Comic Sans MS&quot;">M</span><=
/p></div></div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">=C2=
=A0</p>
  <div>
  <div>
  <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in">On=
=20
  Sat, Mar 6, 2021 at 11:42 AM Bob Spidell &lt;<a href=3D"mailto:bspidell@c=
omcast.net" target=3D"_blank">[email-masked]</a>&gt;=20
  wrote:</p></div>
  <blockquote style=3D"border-width:medium medium medium 1pt;border-style:n=
one none none solid;border-color:initial;padding:0in 0in 0in 6pt;margin-lef=
t:4.8pt;margin-right:0in">
    <div>
    <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in 0i=
n 12pt 11.4pt">I=20
    sold my late father&#39;s 1955 Thunderbird to my BFF. These cars have a=
 very=20
    similar problem to Healeys overheating, esp. at idle. When Ford stuffed=
 the=20
    292ci Y-Block into the T-Bird, they found the engine was (essentially) =
too=20
    short for the long-hooded car, so they &#39;engineered&#39;--I use the =
term=20
    loosely--a cast iron spacer to move the fan closer to the radiator. The=
=20
    spacer had the added &#39;benefit&#39; of severely limiting coolant flo=
w through the=20
    pump and radiator; there are some aftermarket fixes and my friend, afte=
r=20
    doing the usual radiator re-core, better fan, etc. installed both a bet=
ter=20
    pump (larger vanes) and a re-engineered spacer. Attached pic is not of =
the=20
    spacer he used--I can&#39;t find the link to it--but it shows the gener=
al idea=20
    (Ford basically put a &#39;dam&#39; in the cooling system to block flow=
, and the=20
    improved spacers mostly remove it). It appears this approach has improv=
ed=20
    cooling, though the engine probably still gets warm if it has to sit to=
o=20
    long at idle. Link is to one of the improved pumps:<br><br><a href=3D"h=
ttps://www.classictbird.com/Water-Pump-Modified-for-Higher-Output-1-Per-car=
/productinfo/8501HO/" target=3D"_blank">https://www.classictbird.com/Water-=
Pump-Modified-for-Higher-Output-1-Per-car/productinfo/8501HO/</a><br><br>An=
yways,=20
    after doing all the usual stuff to increase cooling, esp. on my BJ8, I&=
#39;ve=20
    wondered if a similar approach would work on Healeys. Their pumps have =
very=20
    small vanes, and the cavity in which the vanes operate seems pretty sma=
ll=20
    for such a large lump of cast iron (I&#39;m guessing an uprated radiato=
r core=20
    won&#39;t help much if the coolant flow is still hampered; at least, th=
at&#39;s what=20
    I&#39;ve found). This is probably not an option as, of course, our engi=
nes don&#39;t=20
    have a similar spacer to be improved upon, and it would be a major task=
 to=20
    increase both the cavity&#39;s size and the pump (but I can dream).<br>=
<br>ps.=20
    The overheating issue with Healeys is usually attributed to too big of =
an=20
    engine in too small of an engine compartment, and too little airflow. B=
ut,=20
    the engine bay in an old T-Bird is huge by comparison--and the engine n=
ot=20
    terribly larger in displacement--and still suffers the same=20
    problem.<br><br>Bob </p></div>
    <p style=3D"font-size:11pt;font-family:Calibri,sans-serif;margin:0in 0i=
n 12pt">=C2=A0</p></blockquote></div></div></div></div></div>______________=
_________________________________<br>Support=20
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arget=3D"_blank">http://www.team.net/donate.html</a><br>Suggested annual=20
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rer" target=3D"_blank">http://autox.team.net/archive</a><br><br><a href=3D"=
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[email-masked]

--===============4631824533788443335==--

---

From: Michael Salter <[email-masked]>
Date: Sun, 7 Mar 2021 21:58:39 -0500

--===============1092595441816413313==

--00000000000024961405bcfd9df0
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Oops my bad ..
The circulation is as Bob described.
The outlet  from the radiator is the bottom hose.

M

On Sat., Mar. 6, 2021, 5:51 p.m. Michael Salter, <[email-masked]>
wrote:

> I rebuild quite a few Healey water pumps and can say unequivocally that
> the seal type used in both the early and late style of 6 cylinder pump wi=
ll
> not handle much more than 7 p.s.i.
er
he
90
ave
e
le
es
ed
.
t
e
his
 real
gh
e
ms
em,
.
ed
y
r
t
 my
ed
ic
the
ch
as
-car/productinfo/8501HO/
mps
 it
ut
ow.
ne
>> not terribly larger in displacement--and still suffers the same problem.

--00000000000024961405bcfd9df0
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Oops my bad ..<div dir=3D"auto">The circulation is as Bob=
 described.=C2=A0</div><div dir=3D"auto">The outlet=C2=A0 from the radiator=
 is the bottom hose.</div><div dir=3D"auto"><br></div><div dir=3D"auto">M</=
div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at=
tr">On Sat., Mar. 6, 2021, 5:51 p.m. Michael Salter, &lt;<a href=3D"mailto:=
[email-masked]">[email-masked]</a>&gt; wrote:<br></div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><div dir=3D"auto">Thanks for all that Bob.=C2=
=A0<div dir=3D"auto">One comment regarding increasing the cooling system pr=
essure.=C2=A0</div><div dir=3D"auto">I rebuild quite a few Healey water pum=
ps and can say unequivocally that the seal type used in both the early and =
late style of 6 cylinder pump will not handle much more than 7 p.s.i.=C2=A0=
</div><div dir=3D"auto">I would not recommend trying that approach.=C2=A0</=
div><div dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sat., Mar. 6, 2=
021, 4:58 p.m. , &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank=
" rel=3D"noreferrer">[email-masked]</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" styl=
e=3D"word-wrap:break-word"><div><p class=3D"MsoNormal"><span style=3D"font-=
size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">Bob &amp; Mike:<u></u=
><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;f=
ont-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial=
&quot;,sans-serif">You both may have seen my requests on overheating of my =
BJ8 and the response from the group.=C2=A0 As a result, I purchased an infr=
ared thermometer to determine if my water gauge was giving accurate reading=
s.=C2=A0 The thermometer gun told me that my water gauge was 30 degrees hig=
her than the temperature of the sensor attached to the block.=C2=A0 At the =
same time, I noticed my gauge will show 120 degrees at rest instead of goin=
g down to 90 degrees which would indicate a 30-degree high reading.=C2=A0 I=
n May when I leave for cool Michigan, I will send the gauge to Nisonger to =
be rebuilt.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"f=
ont-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u><=
/u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-f=
amily:&quot;Arial&quot;,sans-serif">I began to test the temperature of the =
water going through the cooling system at the inlet to and outlet from the =
block, inlet and outlet to the radiator and the upper and lower hoses while=
 the engine is running at idle and at 2-3 Thousand rpm.=C2=A0 The chart I c=
reated to record these temperatures allowed me to produce observations or a=
verages because the flow of the water is dependent upon the rpms of the eng=
ine.=C2=A0 The engine has overheated all of the 40 years I have owned it an=
d has only 1000 miles on the new speedo since rebuilding to 20 over. <u></u=
><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;f=
ont-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial=
&quot;,sans-serif">At the radiator inlet 134 outlet 85 at high rpms with el=
ectric fan operating.<u></u><u></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 inlet 103 outlet =
94 at idle rpms with electric fan operating. <u></u><u></u></span></p><p cl=
ass=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&q=
uot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><spa=
n style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">The a=
bove temperatures are recorded at the inlet and all along the hoses.<u></u>=
<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p c=
lass=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&=
quot;,sans-serif">These temperatures indicate the pump is circulating water=
 with sufficient gallons to cool the engine only when the engine is at high=
 rpms.=C2=A0 At idle the pump does not circulate sufficient water to keep t=
he engine cool.=C2=A0 This is especially true when you have been operating =
the engine at high speed and come down to 30 =E2=80=93 40 mph and stop and =
go traffic.=C2=A0 Maybe the real answer is to install an electric pump for =
constant cooling water?<u></u><u></u></span></p><p class=3D"MsoNormal"><spa=
n style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></=
u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:1=
4.0pt;font-family:&quot;Arial&quot;,sans-serif">In the past week, I have in=
stalled a large Dorman coolant recovery tank and a new 7 psi 1 inch radiato=
r cap because I learned that our radiators have a long neck.=C2=A0 Both tho=
se changes have reduced my problem of very high overheating and resulting b=
oiling over.=C2=A0 In addition, when my water gauge shows 212 degrees the w=
ater temperature is actually 30 degrees less or approximately 185 degrees.=
=C2=A0 Also, I am not boiling over and loosing coolant.=C2=A0 Nevertheless,=
 the engine water temperature is still spiking to 210 plus degrees true whe=
n coming off highway speeds.=C2=A0 <u></u><u></u></span></p><p class=3D"Mso=
Normal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-=
serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif">In my review of=
 various sites, the radiator equipment suppliers and others are recommendin=
g increasing the pressure in the classic car systems to 15 psi plus, and co=
olant recovery tanks =E2=80=9Cif your coolant system, radiator, hoses etc. =
is new=E2=80=9D and therefore can hold the pressure.=C2=A0 Unfortunately, I=
 have not found any maker of a 1 inch depth x 2.33 inch diameter radiator c=
ap except our 7 psi cap so I can try such a pressurized system.<u></u><u></=
u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-fa=
mily:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot=
;,sans-serif">Another suggestion on an older discussion at the British Car =
Forum indicated some of the Ontario car owners had switched to Evans Waterl=
ess Coolant rather than 50/50 coolant water mixture.<u></u><u></u></span></=
p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot;=
Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNorma=
l"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif=
">I still have no idea why a minority of our group has overheating problems=
.=C2=A0 More ideas?<u></u><u></u></span></p><p class=3D"MsoNormal"><span st=
yle=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=
=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.=
0pt;font-family:&quot;Arial&quot;,sans-serif">Regards,<u></u><u></u></span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quo=
t;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-ser=
if">Bob Begani 67 BJ8 <u></u><u></u></span></p><p class=3D"MsoNormal"><span=
 style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u=
>=C2=A0<u></u></span></p><div style=3D"border:none;border-top:solid #e1e1e1=
 1.0pt;padding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><b>From:</b> Heale=
ys &lt;<a href=3D"mailto:[email-masked]" rel=3D"noreferrer =
noreferrer" target=3D"_blank">[email-masked]</a>&gt; <b>On =
Behalf Of </b>Michael Salter via Healeys<br><b>Sent:</b> Saturday, March 6,=
 2021 12:20 PM<br><b>To:</b> Bob Spidell &lt;<a href=3D"mailto:bspidell@com=
cast.net" rel=3D"noreferrer noreferrer" target=3D"_blank">bspidell@comcast.=
net</a>&gt;<br><b>Cc:</b> <a href=3D"mailto:[email-masked]" rel=3D"=
noreferrer noreferrer" target=3D"_blank">[email-masked]</a><br><b>S=
ubject:</b> Re: [Healeys] 100 water pumps<u></u><u></u></p></div><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal"><sp=
an style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Yes =
Bob, there is something wrong with our assumptions regarding the cooling sy=
stem not being &quot;large&quot; enough. </span><span style=3D"font-size:12=
.0pt"><u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span styl=
e=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">My wifes Ma=
xima is around 300 HP and the radiator has less area than the 100. Certainl=
y it has a couple of very effective electric fans but they really don&#39;t=
 cut in very often unless you have the AC on.</span><span style=3D"font-siz=
e:12.0pt"><u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span =
style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">I&#39;m=
 suspicious of the rate of circulation but I&#39;ve talked to Larry Varley =
about this subject and he indicated that increasing the size of the water p=
ump annular orifice didn&#39;t make much difference when he tried it.</span=
><span style=3D"font-size:12.0pt"><u></u><u></u></span></p></div><div><p cl=
ass=3D"MsoNormal"><span style=3D"font-size:12.0pt"><u></u>=C2=A0<u></u></sp=
an></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">M</span><span style=3D"font-size:12=
.0pt;font-family:&quot;Comic Sans MS&quot;"><u></u><u></u></span></p></div>=
<div><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&qu=
ot;Comic Sans MS&quot;"><u></u>=C2=A0<u></u></span></p></div><div><p class=
=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Comic Sans=
 MS&quot;">M<u></u><u></u></span></p></div></div><p class=3D"MsoNormal"><u>=
</u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal">On Sat, Mar 6, 2021 a=
t 11:42 AM Bob Spidell &lt;<a href=3D"mailto:[email-masked]" rel=3D"n=
oreferrer noreferrer" target=3D"_blank">[email-masked]</a>&gt; wrote:=
<u></u><u></u></p></div><blockquote style=3D"border:none;border-left:solid =
#cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"=
><div><p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt=
;margin-left:11.4pt">I sold my late father&#39;s 1955 Thunderbird to my BFF=
. These cars have a very similar problem to Healeys overheating, esp. at id=
le. When Ford stuffed the 292ci Y-Block into the T-Bird, they found the eng=
ine was (essentially) too short for the long-hooded car, so they &#39;engin=
eered&#39;--I use the term loosely--a cast iron spacer to move the fan clos=
er to the radiator. The spacer had the added &#39;benefit&#39; of severely =
limiting coolant flow through the pump and radiator; there are some afterma=
rket fixes and my friend, after doing the usual radiator re-core, better fa=
n, etc. installed both a better pump (larger vanes) and a re-engineered spa=
cer. Attached pic is not of the spacer he used--I can&#39;t find the link t=
o it--but it shows the general idea (Ford basically put a &#39;dam&#39; in =
the cooling system to block flow, and the improved spacers mostly remove it=
). It appears this approach has improved cooling, though the engine probabl=
y still gets warm if it has to sit too long at idle. Link is to one of the =
improved pumps:<br><br><a href=3D"https://www.classictbird.com/Water-Pump-M=
odified-for-Higher-Output-1-Per-car/productinfo/8501HO/" rel=3D"noreferrer =
noreferrer" target=3D"_blank">https://www.classictbird.com/Water-Pump-Modif=
ied-for-Higher-Output-1-Per-car/productinfo/8501HO/</a><br><br>Anyways, aft=
er doing all the usual stuff to increase cooling, esp. on my BJ8, I&#39;ve =
wondered if a similar approach would work on Healeys. Their pumps have very=
 small vanes, and the cavity in which the vanes operate seems pretty small =
for such a large lump of cast iron (I&#39;m guessing an uprated radiator co=
re won&#39;t help much if the coolant flow is still hampered; at least, tha=
t&#39;s what I&#39;ve found). This is probably not an option as, of course,=
 our engines don&#39;t have a similar spacer to be improved upon, and it wo=
uld be a major task to increase both the cavity&#39;s size and the pump (bu=
t I can dream).<br><br>ps. The overheating issue with Healeys is usually at=
tributed to too big of an engine in too small of an engine compartment, and=
 too little airflow. But, the engine bay in an old T-Bird is huge by compar=
ison--and the engine not terribly larger in displacement--and still suffers=
 the same problem.<br><br>Bob <u></u><u></u></p></div><p class=3D"MsoNormal=
" style=3D"margin-bottom:12.0pt"><u></u>=C2=A0<u></u></p></blockquote></div=
></div></div></blockquote></div>
</blockquote></div>

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[email-masked]

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