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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: rfbegani@gmail.com
To: 'Michael Salter' <michaelsalter@gmail.com>; 'Bob Spidell' <bspidell@com=
cast.net>; 'Ahealey help' <healeys@autox.team.net>
Sent: Sat, Mar 6, 2021 3:58 pm
Subject: [Healeys] Overheating
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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
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<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. <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: rfbegani@gmail.com<br>
To: 'Michael Salter' <michaelsalter@gmail.com>; 'Bob Spidell' <bsp=
idell@comcast.net>; 'Ahealey help' <healeys@autox.team.net><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:"Arial", sans-serif;">Bob & Mike:</span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;">You both may have seen my requests o=
n 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 giv=
ing accurate readings. The thermometer gun told me that my water gaug=
e 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 h=
igh reading. 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:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", 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. 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. 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:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span 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></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> =
&nb=
sp; 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:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><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></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", 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. At idle the pump does not circulate suffi=
cient 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?</span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", 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. Both those change=
s have reduced my problem of very high overheating and resulting boiling ov=
er. In addition, when my water gauge shows 212 degrees the water temp=
erature is actually 30 degrees less or approximately 185 degrees. Als=
o, I am not boiling over and loosing coolant. Nevertheless, the engin=
e water temperature is still spiking to 210 plus degrees true when coming o=
ff highway speeds. </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", 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. 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:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", 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:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;">I still have no idea why a minority =
of our group has overheating problems. More ideas?</span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;">Regards,</span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;">Bob Begani 67 BJ8 </span></div>
<div class=3D"yiv7728791887MsoNormal"><span style=3D"font-size:14.0pt;font-=
family:"Arial", sans-serif;"> </span></div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in;">
<div class=3D"yiv7728791887MsoNormal"><br>
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</div>
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</div>
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</div>
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