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The cooling of the radiator and temp spike seem to indicate an air bubble in
the system. It could get there from spot temps causing localized boiling or it
could come from a pressure leak from the combustion chamber or head gasket.
If you think you have a cracked head or bad head gasket, try pressurizing the
system and see if the pressure holds. Stant makes a tool like, there are
probably others, but buy or borrow this tool. It takes all the guess work out
of such problems. My rule of thumb is to bring it up to cap pressure and see if
it holds for at last 30 minutes (plus or minus a couple of lb is okay, but
loosing half or more in less than 30 minutes is a dead giveaway.
I would also verify that the ignition timing is not too far advanced. Not that
I ever had that problem. :-)
Note that you can also use the Stant gauge to verify "normal" system pressure -
you want to do that to make sure your cap pressure will keep the coolant from
boiling.
Good luck figuring out the problem.
Regards,Bob Lang
On Saturday, September 23, 2023 at 02:05:24 PM EDT, Anthony Parker via Fot
<fot@autox.team.net> wrote:
I'm having cooling problems.Need help being convinced that I have to do what
I don't want to do.
Brand new short block, same old head, water pump, and radiator.
Over three trials, the engine will run fine and warm up with radiator hoses and
radiator warming properly. Then the hoses and radiator will cool and coolant
temp will spike to 230+. Radiator cold with sky high coolant temps.
Two more clues, hoses seem to pressurize very quickly and when I opened the
radiator cap this morning (after cooling all night) pressurized air and coolant
shot everywhere.
No thermostat and I have confirmed three times that system is completely full
Seems I have combustion gases getting into coolant and then bubbles eventually
removing pump prime.
Don't know what else it could be.
Given the apparent direction of the leak, is there any use in trying some "stop
leak" product?
Is it time to pull the head again to look for warping or gasket leak?
I suppose it could be a cracked cylinder, but this block has been checked by
two different trusted engine machinists.
Desperately trying to get to the RunOffs,
Anthony._______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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<html><head></head><body><div class=3D"ydp59097fd5yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
<div dir=3D"ltr" data-setdir=3D"false">The cooling of the radiator =
and temp spike seem to indicate an air bubble in the system. It could get t=
here from spot temps causing localized boiling or it could come from a pres=
sure leak from the combustion chamber or head gasket.<br></div><div dir=3D"=
ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false"=
>If you think you have a cracked head or bad head gasket, try pressurizing =
the system and see if the pressure holds. Stant makes a tool like, there ar=
e probably others, but buy or borrow this tool. It takes all the guess work=
out of such problems. My rule of thumb is to bring it up to cap pressure a=
nd see if it holds for at last 30 minutes (plus or minus a couple of lb is =
okay, but loosing half or more in less than 30 minutes is a dead giveaway.<=
br></div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" =
data-setdir=3D"false">I would also verify that the ignition timing is not t=
oo far advanced. Not that I ever had that problem. :-)</div><div dir=3D"ltr=
" data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">No=
te that you can also use the Stant gauge to verify "normal" system pressure=
- you want to do that to make sure your cap pressure will keep the coolant=
from boiling.</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div d=
ir=3D"ltr" data-setdir=3D"false">Good luck figuring out the problem.</div><=
div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdi=
r=3D"false">Regards,</div><div dir=3D"ltr" data-setdir=3D"false">Bob Lang<b=
r></div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div><br></div>
=20
</div><div id=3D"ydpf09cc1feyahoo_quoted_6336859216" class=3D"ydpf0=
9cc1feyahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Saturday, September 23, 2023 at 02:05:24 PM EDT, Ant=
hony Parker via Fot <fot@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"ydpf09cc1feyiv8718614122">
=20
<div dir=3D"ltr">
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);" class=3D"ydpf09cc1feyiv8718614122elementToProof">
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0">
<span style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0=
">I'm having cooling problems.</span></div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
Need help being convinced that I have to do what I don't want to do.</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
<br>
</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
Brand new short block, same old head, water pump, and radiator.<br>
<div dir=3D"ltr" style=3D"margin:0px;"><br class=3D"ydpf09cc1feyiv871861412=
2ContentPasted0">
</div>
<div style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0"=
>Over three trials, the engine will run fine and warm up with radiator hose=
s and radiator warming properly. Then the hoses and radiator will cool and =
coolant temp will spike to 230+. Radiator cold with sky high
coolant temps.</div>
<div dir=3D"ltr" style=3D"margin:0px;"><br class=3D"ydpf09cc1feyiv871861412=
2ContentPasted0">
</div>
<div style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0"=
>Two more clues, hoses seem to pressurize very quickly and when I opened th=
e radiator cap this morning (after cooling all night) pressurized air and c=
oolant shot everywhere.</div>
<div style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0"=
><br>
</div>
<div style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0"=
><span style=3D"display:inline !important;background-color:rgb(255, 255, 25=
5);" class=3D"ydpf09cc1feyiv8718614122ContentPasted1">No thermostat and I h=
ave confirmed three times that system is completely full</span><br>
</div>
<div dir=3D"ltr" style=3D"margin:0px;"><br class=3D"ydpf09cc1feyiv871861412=
2ContentPasted0">
</div>
<div style=3D"margin:0px;" class=3D"ydpf09cc1feyiv8718614122ContentPasted0"=
>Seems I have combustion gases getting into coolant and then bubbles eventu=
ally removing pump prime.</div>
<div dir=3D"ltr" style=3D"margin:0px;"><br class=3D"ydpf09cc1feyiv871861412=
2ContentPasted0">
</div>
Don't know what else it could be.</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
<br>
</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
Given the apparent direction of the leak, is there any use in trying some "=
stop leak" product?</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
<br>
</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
Is it time to pull the head again to look for warping or gasket leak?</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
<br>
</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
I suppose it could be a cracked cylinder, but this block has been checked b=
y two different trusted engine machinists.</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
<br>
</div>
<div style=3D"font-size:15px;font-family:UI Web -apple-system, BlinkMacSyst=
emFont, Roboto, sans-serif;margin:0px;color:rgb(36, 36, 36);background-colo=
r:rgb(255, 255, 255);" class=3D"ydpf09cc1feyiv8718614122ContentPasted0 ydpf=
09cc1feyiv8718614122elementToProof">
Desperately trying to get to the RunOffs, Anthony.</div>
</div>
</div>
</div>_______________________________________________<br><a href=3D"mailto:=
fot@autox.team.net" rel=3D"nofollow" target=3D"_blank">fot@autox.team.net</=
a><br><br><a href=3D"http://www.fot-racing.com"; rel=3D"nofollow" target=3D"=
_blank">http://www.fot-racing.com</a><br><br>Donate: <a href=3D"http://www.=
team.net/donate.html" rel=3D"nofollow" target=3D"_blank">http://www.team.ne=
t/donate.html</a><br>Archive: <a href=3D"http://autox.team.net/archive"; rel=
=3D"nofollow" target=3D"_blank">http://autox.team.net/archive</a> <a href=
=3D"http://www.team.net/pipermail/fot"; rel=3D"nofollow" target=3D"_blank">h=
ttp://www.team.net/pipermail/fot</a><br>Unsubscribe/Manage: <a href=3D"http=
://autox.team.net/mailman/options/fot/robertlangtr6@yahoo.com" rel=3D"nofol=
low" target=3D"_blank">http://autox.team.net/mailman/options/fot/robertlang=
tr6@yahoo.com</a><br><br><br></div>
</div>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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