Subject: [Mgs] Overheating MGB GT

From: Michael MacLean <[email-masked]>
Date: Sun, 25 Oct 2020 02:16:52 +0000 (UTC)

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I have been having problems with my MGB GT running hot.=C2=A0 To start out =
with the simplest things first, I removed the radiator cap and found what y=
ou see in the picture.=C2=A0 Add to that it is a 7 psi cap.=C2=A0 My car is=
 a 1969 which requires a 10 psi cap.=C2=A0 After running out two tanks of g=
as it took half a 50/50 mix antifreeze container to fill the system back up=
.=C2=A0 Checking the timing is next.Mike MacLean1969 MGB GT with a 1967 eng=
ine.1960 Bugeye 1275 w/Datsun 5 Speed1956 BN2 Lemans

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<html><head></head><body><div class=3D"ydp3bb4de78yahoo-style-wrap" style=
=3D"font-family: times new roman, new york, times, serif; font-size: 16px;"=
><div id=3D"ydp3bb4de78yiv2637017514">I have been having problems with my M=
GB GT running hot.&nbsp; To start out with the simplest things first, I rem=
oved the radiator cap and found what you see in the picture.&nbsp; Add to t=
hat it is a 7 psi cap.&nbsp; My car is a 1969 which requires a 10 psi cap.&=
nbsp; After running out two tanks of gas it took half a 50/50 mix antifreez=
e container to fill the system back up.&nbsp; Checking the timing is next.<=
div id=3D"ydp3bb4de78yiv2637017514yMail_cursorElementTracker_1603577190625"=
>Mike MacLean</div><div id=3D"ydp3bb4de78yiv2637017514yMail_cursorElementTr=
acker_1603577199685">1969 MGB GT with a 1967 engine.</div><div id=3D"ydp3bb=
4de78yiv2637017514yMail_cursorElementTracker_1603577240007">1960 Bugeye 127=
5 w/Datsun 5 Speed</div><div id=3D"ydp3bb4de78yiv2637017514yMail_cursorElem=
entTracker_1603577269376">1956 BN2 Lemans<br><br><div id=3D"ydp3bb4de78yiv2=
637017514ymail_android_signature"><a id=3D"ydp3bb4de78yiv2637017514ymail_an=
droid_signature_link" href=3D"https://go.onelink.me/107872968?pid=3DInProdu=
ct&amp;c=3DGlobal_Internal_YGrowth_AndroidEmailSig__AndroidUsers&amp;af_wl=
=3Dym&amp;af_sub1=3DInternal&amp;af_sub2=3DGlobal_YGrowth&amp;af_sub3=3DEma=
ilSignature" rel=3D"nofollow" target=3D"_blank">Sent from AT&amp;T Yahoo Ma=
il on Android</a></div></div></div></div></body></html>
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_______________________________________________

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

Unsubscribe: http://autox.team.net/mailman/options/mgs/[email-masked]

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From: "PaulHunt73" <[email-masked]>
Date: Sun, 25 Oct 2020 09:05:09 -0000 rqGRpK7GLvr23iAouE7tGdVO0+q2wIFmZxUTPV4b71w+pTM0d5xXk2ZIhoKtkXXaDH9gqd6SKeLWO911+MOVaix7/j0kWPjVybs=

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Unless you were really driving it hard the 7lb cap wouldn't have been a =
problem - if it IS holding 7lb, although the correct cap would be =
better.

If it took half a gallon to top it back up it must have been half empty. =
 The sludge could have been because insufficient coolant was boiling, =
but the question is where the coolant went since you last checked the =
level.  Either you have a coolant leak, or maybe a headgasket leak which =
is boiling it out.

In my experience the temp gauge rarely shows a problem when you are =
losing coolant from a system leak, unlike when the engine really is =
running hot and boiling coolant out that way, in which case I'd expect =
to see signs of that brown staining round the outlet from the rad over =
flow port or hose.  Head gasket leaks can result in significant temp =
gauge oscillation.

Timing?  I have my doubts.

PaulH.

  ----- Original Message -----=20
  I have been having problems with my MGB GT running hot.  To start out =
with the simplest things first, I removed the radiator cap and found =
what you see in the picture.  Add to that it is a 7 psi cap.  My car is =
a 1969 which requires a 10 psi cap.  After running out two tanks of gas =
it took half a 50/50 mix antifreeze container to fill the system back =
up.  Checking the timing is next.
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=EF=BB=BF<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Dutf-8" http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23588">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>Unless you were really driving it hard the 7lb cap =
wouldn't=20
have been a problem - if it&nbsp;IS holding 7lb, although the correct =
cap would=20
be better.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>If it took half a gallon to top it back up&nbsp;it =
must have=20
been&nbsp;half empty.&nbsp; The sludge could have been because =
insufficient=20
coolant was boiling, but the question is where the coolant went since =
you last=20
checked the level.&nbsp; Either you have a coolant leak, or maybe a =
headgasket=20
leak which is boiling it out.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>In my experience the temp gauge rarely shows a =
problem when=20
you are losing coolant from a system leak, unlike when the engine really =
is=20
running hot and boiling coolant out that way, in which case I'd expect =
to see=20
signs of that brown staining round the outlet from the rad over flow =
port or=20
hose.&nbsp; Head gasket leaks can result in significant temp gauge=20
oscillation.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Timing?&nbsp; I have my doubts.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 16px"=20
  class=3Dydp3bb4de78yahoo-style-wrap>
  <DIV id=3Dydp3bb4de78yiv2637017514>I have been having problems with my =
MGB GT=20
  running hot.&nbsp; To start out with the simplest things first, I =
removed the=20
  radiator cap and found what you see in the picture.&nbsp; Add to that =
it is a=20
  7 psi cap.&nbsp; My car is a 1969 which requires a 10 psi cap.&nbsp; =
After=20
  running out two tanks of gas it took half a 50/50 mix antifreeze =
container to=20
  fill the system back up.&nbsp; Checking the timing is=20
next.</DIV></DIV></BLOCKQUOTE></BODY></HTML>

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[email-masked]

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From: Robert's New iPad <[email-masked]>
Date: Sun, 25 Oct 2020 07:14:28 -0400

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    Is it known to be running hot because the gauge or a thermometer says so=
?=20
    In two tanks or running, assume 500 miles, the loss of two quarts is exc=
essive, but you should not be boiling off that much even if the cap is rated=
 below 10 psi. =20
   The look of that cap suggests corrosion and dirt in the engine and radiat=
or.  Has the antifreeze protection been maintained in the last few years, th=
e AF being changed every other year?
   You might consider driving around with the cap loose until engine is full=
y warmed, then putting a kitchen thermometer into the water.  Also, an infra=
-red thermometer used on the thermostat housing and in a pattern around the r=
adiator will tell you something. =20
    =46rom look of the cap, I suspect that there is sediment in the system a=
nd that radiator is partly blocked. Do this testing then we can evaluate the=
 problem better.
Bob

> On Oct 24, 2020, at 10:16 PM, Michael MacLean <[email-masked]> wr=
ote:
>=20
> I have been having problems with my MGB GT running hot.  To start out with=
 the simplest things first, I removed the radiator cap and found what you se=
e in the picture.  Add to that it is a 7 psi cap.  My car is a 1969 which re=
quires a 10 psi cap.  After running out two tanks of gas it took half a 50/5=
0 mix antifreeze container to fill the system back up.  Checking the timing i=
s next.
> Mike MacLean
> 1969 MGB GT with a 1967 engine.
> 1960 Bugeye 1275 w/Datsun 5 Speed
> 1956 BN2 Lemans
>=20
> <Rad Cap.jpg>
>=20
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.75
>=20
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/[email-masked]

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">&nb=
sp; &nbsp; Is it known to be running hot because the gauge or a thermometer s=
ays so?&nbsp;</div><div dir=3D"ltr">&nbsp; &nbsp; In two tanks or running, a=
ssume 500 miles, the loss of two quarts is excessive, but you should not be b=
oiling off that much even if the cap is rated below 10 psi. &nbsp;</div><div=
 dir=3D"ltr">&nbsp; &nbsp;The look of that cap suggests corrosion and dirt i=
n the engine and radiator. &nbsp;Has the antifreeze protection been maintain=
ed in the last few years, the AF being changed every other year?</div><div d=
ir=3D"ltr">&nbsp; &nbsp;You might consider driving around with the cap loose=
 until engine is fully warmed, then putting a kitchen thermometer into the w=
ater. &nbsp;Also, an infra-red thermometer used on the thermostat housing an=
d in a pattern around the radiator will tell you something. &nbsp;</div><div=
 dir=3D"ltr">&nbsp; &nbsp; =46rom look of the cap, I suspect that there is s=
ediment in the system and that radiator is partly blocked. Do this testing t=
hen we can evaluate the problem better.</div><div dir=3D"ltr">Bob</div><div d=
ir=3D"ltr"><br></div><div dir=3D"ltr"><br>On Oct 24, 2020, at 10:16 PM, Mich=
ael MacLean &lt;<a href=3D"mailto:[email-masked]">rrengineer.mike@a=
tt.net</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><div dir=3D"ltr=
"><div class=3D"ydp3bb4de78yahoo-style-wrap" style=3D"font-family: times new=
 roman, new york, times, serif; font-size: 16px;"><div id=3D"ydp3bb4de78yiv2=
637017514">I have been having problems with my MGB GT running hot.&nbsp; To s=
tart out with the simplest things first, I removed the radiator cap and foun=
d what you see in the picture.&nbsp; Add to that it is a 7 psi cap.&nbsp; My=
 car is a 1969 which requires a 10 psi cap.&nbsp; After running out two tank=
s of gas it took half a 50/50 mix antifreeze container to fill the system ba=
ck up.&nbsp; Checking the timing is next.<div id=3D"ydp3bb4de78yiv2637017514=
yMail_cursorElementTracker_1603577190625">Mike MacLean</div><div id=3D"ydp3b=
b4de78yiv2637017514yMail_cursorElementTracker_1603577199685">1969 MGB GT wit=
h a 1967 engine.</div><div id=3D"ydp3bb4de78yiv2637017514yMail_cursorElement=
Tracker_1603577240007">1960 Bugeye 1275 w/Datsun 5 Speed</div><div id=3D"ydp=
3bb4de78yiv2637017514yMail_cursorElementTracker_1603577269376">1956 BN2 Lema=
ns<br><br><div id=3D"ydp3bb4de78yiv2637017514ymail_android_signature"><a id=3D=
"ydp3bb4de78yiv2637017514ymail_android_signature_link" href=3D"https://go.on=
elink.me/107872968?pid=3DInProduct&amp;c=3DGlobal_Internal_YGrowth_AndroidEm=
ailSig__AndroidUsers&amp;af_wl=3Dym&amp;af_sub1=3DInternal&amp;af_sub2=3DGlo=
bal_YGrowth&amp;af_sub3=3DEmailSignature" rel=3D"nofollow" target=3D"_blank"=
>Sent from AT&amp;T Yahoo Mail on Android</a></div></div></div></div></div><=
/blockquote><blockquote type=3D"cite"><div dir=3D"ltr">&lt;Rad Cap.jpg&gt;</=
div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr">&lt;Prestone.jpg=
&gt;</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>____=
___________________________________________</span><br><span></span><br><span=
><a href=3D"mailto:[email-masked]">[email-masked]</a></span><br><spa=
n>Donate: <a href=3D"http://www.team.net/donate.html">http://www.team.net/do=
nate.html</a></span><br><span>Suggested annual donation &nbsp;$12.75</span><=
br><span></span><br><span>Archive: <a href=3D"http://www.team.net/pipermail/=
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archive">http://autox.team.net/archive</a></span><br><span></span><br><span>=
Unsubscribe: <a href=3D"http://autox.team.net/mailman/options/mgs/mgbobh@gma=
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><br></div></blockquote></body></html>=

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[email-masked]

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---

From: Charley Robinson <[email-masked]>
Date: Sun, 25 Oct 2020 06:49:34 -0500

If there ever was a candidate for a cooling system flush, you have it.

CR

[email-masked]

---

From: Dan DiBiase <[email-masked]>
Date: Sun, 25 Oct 2020 09:22:15 -0400

--===============1943434553495882660==

--000000000000e55e9905b27eb513

" From look of the cap, I suspect that there is sediment in the system and
that radiator is partly blocked. Do this testing then we can evaluate the
problem better. "

That was my first thought as well.

Dan D
'76B, '65B
Central NJ USA
http://dandibiase.cbintouch.com/

On Sun, Oct 25, 2020 at 7:16 AM Robert's New iPad <[email-masked]> wrote:

>     Is it known to be running hot because the gauge or a thermometer says
> so?
>     In two tanks or running, assume 500 miles, the loss of two quarts is
> excessive, but you should not be boiling off that much even if the cap is
> rated below 10 psi.
>    The look of that cap suggests corrosion and dirt in the engine and
> radiator.  Has the antifreeze protection been maintained in the last few
> years, the AF being changed every other year?
>    You might consider driving around with the cap loose until engine is
> fully warmed, then putting a kitchen thermometer into the water.  Also, an
> infra-red thermometer used on the thermostat housing and in a pattern
> around the radiator will tell you something.
>     From look of the cap, I suspect that there is sediment in the system
> and that radiator is partly blocked. Do this testing then we can evaluate
> the problem better.
> Bob
>
>
> On Oct 24, 2020, at 10:16 PM, Michael MacLean <[email-masked]>
> wrote:
>
> I have been having problems with my MGB GT running hot.  To start out with
> the simplest things first, I removed the radiator cap and found what you
> see in the picture.  Add to that it is a 7 psi cap.  My car is a 1969 which
> requires a 10 psi cap.  After running out two tanks of gas it took half a
> 50/50 mix antifreeze container to fill the system back up.  Checking the
> timing is next.
> Mike MacLean
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> <Rad Cap.jpg>
>
>
> Unsubscribe:
> http://autox.team.net/mailman/options/mgs/[email-masked]
>

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<div dir=3D"ltr">&quot;

>From look of the cap, I suspect that there is sediment in the system and th=
at radiator is partly blocked. Do this testing then we can evaluate the pro=
blem better.=C2=A0&quot;<div><br></div><div>That was my first=C2=A0thought =
as well.=C2=A0</div><div><br></div><div>Dan D</div><div>&#39;76B, &#39;65B<=
/div><div>Central NJ USA<br clear=3D"all"><div><div dir=3D"ltr" class=3D"gm=
ail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><a href=
=3D"http://dandibiase.cbintouch.com/" target=3D"_blank">http://dandibiase.c=
bintouch.com/</a></div></div></div><br></div></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Oct 25, 2020 at 7:16 A=
M Robert&#39;s New iPad &lt;<a href=3D"mailto:[email-masked]">mgbobh@gmai=
l.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">=C2=A0 =C2=
=A0 Is it known to be running hot because the gauge or a thermometer says s=
o?=C2=A0</div><div dir=3D"ltr">=C2=A0 =C2=A0 In two tanks or running, assum=
e 500 miles, the loss of two quarts is excessive, but you should not be boi=
ling off that much even if the cap is rated below 10 psi. =C2=A0</div><div =
dir=3D"ltr">=C2=A0 =C2=A0The look of that cap suggests corrosion and dirt i=
n the engine and radiator.=C2=A0 Has the antifreeze protection been maintai=
ned in the last few years, the AF being changed every other year?</div><div=
 dir=3D"ltr">=C2=A0 =C2=A0You might consider driving around with the cap lo=
ose until engine is fully warmed, then putting a kitchen thermometer into t=
he water.=C2=A0 Also, an infra-red thermometer used on the thermostat housi=
ng and in a pattern around the radiator will tell you something. =C2=A0</di=
v><div dir=3D"ltr">=C2=A0 =C2=A0 From look of the cap, I suspect that there=
 is sediment in the system and that radiator is partly blocked. Do this tes=
ting then we can evaluate the problem better.</div><div dir=3D"ltr">Bob</di=
v><div dir=3D"ltr"><br></div><div dir=3D"ltr"><br>On Oct 24, 2020, at 10:16=
 PM, Michael MacLean &lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank">[email-masked]</a>&gt; wrote:<br><br></div><blockquote=
 type=3D"cite"><div dir=3D"ltr"><div style=3D"font-family:&quot;times new r=
oman&quot;,&quot;new york&quot;,times,serif;font-size:16px"><div id=3D"gmai=
l-m_-2231687197726795306ydp3bb4de78yiv2637017514">I have been having proble=
ms with my MGB GT running hot.=C2=A0 To start out with the simplest things =
first, I removed the radiator cap and found what you see in the picture.=C2=
=A0 Add to that it is a 7 psi cap.=C2=A0 My car is a 1969 which requires a =
10 psi cap.=C2=A0 After running out two tanks of gas it took half a 50/50 m=
ix antifreeze container to fill the system back up.=C2=A0 Checking the timi=
ng is next.<div id=3D"gmail-m_-2231687197726795306ydp3bb4de78yiv2637017514y=
Mail_cursorElementTracker_1603577190625">Mike MacLean</div><div id=3D"gmail=
-m_-2231687197726795306ydp3bb4de78yiv2637017514yMail_cursorElementTracker_1=
603577199685">1969 MGB GT with a 1967 engine.</div><div id=3D"gmail-m_-2231=
687197726795306ydp3bb4de78yiv2637017514yMail_cursorElementTracker_160357724=
0007">1960 Bugeye 1275 w/Datsun 5 Speed</div><div id=3D"gmail-m_-2231687197=
726795306ydp3bb4de78yiv2637017514yMail_cursorElementTracker_1603577269376">=
1956 BN2 Lemans<br><br><div id=3D"gmail-m_-2231687197726795306ydp3bb4de78yi=
v2637017514ymail_android_signature"><a id=3D"gmail-m_-2231687197726795306yd=
p3bb4de78yiv2637017514ymail_android_signature_link" href=3D"https://go.onel=
ink.me/107872968?pid=3DInProduct&amp;c=3DGlobal_Internal_YGrowth_AndroidEma=
ilSig__AndroidUsers&amp;af_wl=3Dym&amp;af_sub1=3DInternal&amp;af_sub2=3DGlo=
bal_YGrowth&amp;af_sub3=3DEmailSignature" rel=3D"nofollow" target=3D"_blank=
">Sent from AT&amp;T Yahoo Mail on Android</a></div></div></div></div></div=
></blockquote><blockquote type=3D"cite"><div dir=3D"ltr">&lt;Rad Cap.jpg&gt=
;</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr">&lt;Prestone=
.jpg&gt;</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span=
>_______________________________________________</span><br><span></span><br=
><span><a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
am.net</a></span><br><span>Donate: <a href=3D"http://www.team.net/donate.ht=
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_______________________________<br>
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From: Barney Gaylord <[email-masked]>
Date: Sun, 25 Oct 2020 13:03:42 -0400

Last time I saw soft scum that color in a radiator it had oil in the 
coolant, so it might be a head gasket problem.

At 10:16 PM 10/24/2020, Michael MacLean wrote:
>I have been having problems with my MGB GT running hot.  To start 
>out with the simplest things first, I removed the radiator cap and 
>found what you see in the picture.  Add to that it is a 7 psi 
>cap.  My car is a 1969 which requires a 10 psi cap.  After running 
>out two tanks of gas it took half a 50/50 mix antifreeze container 
>to fill the system back up.  Checking the timing is next.
>Mike MacLean
>....
>Attachment: Rad Cap.jpg

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