troubleshooting overheating
Thread Starter
Racer
Joined: Dec 2004
Posts: 372
Likes: 5
From: North West, Georgia
Wells thats the problem so far.
I cannot find a leak of any sort.
No combustion residue in coolant.
pulled the plugs and i see nothing that would lead me to believe im getting water leakage there...
I cannot find a leak of any sort.
No combustion residue in coolant.
pulled the plugs and i see nothing that would lead me to believe im getting water leakage there...
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
[QUOTE=bogus]gee... you need the combustion test kit. There is a test that can be run on the coolant, to determine if there is combustion by-products in the coolant. This would tell you if a head gasket is bad.
Get that test kit.
And you won't get greasy. :
Here you go:
http://jcsonlinetoolshed.com/product...052fa1950cf4e6
It will give you a definitive answer if your head gasket is bad causing exhaust gases in the coolant. That would explain your loss of coolant.
Get that test kit.
And you won't get greasy. :
Here you go:
http://jcsonlinetoolshed.com/product...052fa1950cf4e6
It will give you a definitive answer if your head gasket is bad causing exhaust gases in the coolant. That would explain your loss of coolant.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by seering
Wells thats the problem so far.
I cannot find a leak of any sort.
No combustion residue in coolant.
pulled the plugs and i see nothing that would lead me to believe im getting water leakage there...
I cannot find a leak of any sort.
No combustion residue in coolant.
pulled the plugs and i see nothing that would lead me to believe im getting water leakage there...
Given that you've been adding fresh fluid to it I don't know how accurate the combustion residue test is. I'd do a pressure test of the cooling system and/or leakdown tests of the cylinders.
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
[QUOTE=ittlfly][QUOTE=bogus]gee... you need the combustion test kit. There is a test that can be run on the coolant, to determine if there is combustion by-products in the coolant. This would tell you if a head gasket is bad.
Get that test kit.
And you won't get greasy. :
Here you go:
http://jcsonlinetoolshed.com/product...052fa1950cf4e6
It will give you a definitive answer if your head gasket is bad causing exhaust gases in the coolant. That would explain your loss of coolant. How did you determine that there was no "no combustion in the coolant"? This use of this test with the blue dye leaves no doubt one way or the other. IMHO its $30. well spent rather than throwing parts at it.
Get that test kit.
And you won't get greasy. :
Here you go:
http://jcsonlinetoolshed.com/product...052fa1950cf4e6
It will give you a definitive answer if your head gasket is bad causing exhaust gases in the coolant. That would explain your loss of coolant. How did you determine that there was no "no combustion in the coolant"? This use of this test with the blue dye leaves no doubt one way or the other. IMHO its $30. well spent rather than throwing parts at it.
Advanced
Joined: Dec 2003
Posts: 67
Likes: 0
From: Pearland Texas
Originally Posted by seering
found some REALLY odd results this morning
driving normally at 70MPH ... constant 200 degrees (about 18-2000 RPMS
pull it down into 3rd gear
and the RPMS jump to about 3k.
TEMPS start dropping and hold at around 194.
back to overdrive ... and temps slow climb back to 200 steady.
/shrug new waterpump and thermo are on the way just in case from GM parts direct...
What the heck ... replacing them 1st .. next will be a radiator from Dewitts
driving normally at 70MPH ... constant 200 degrees (about 18-2000 RPMS
pull it down into 3rd gear
and the RPMS jump to about 3k.
TEMPS start dropping and hold at around 194.
back to overdrive ... and temps slow climb back to 200 steady.
/shrug new waterpump and thermo are on the way just in case from GM parts direct...
What the heck ... replacing them 1st .. next will be a radiator from Dewitts
Jeff
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
That's not that unusual I think. I can run say at 69 mph and see temps around 196-198, bring it up to say 84 mph and the temps drop to about 192-194. I would guess that the engine is operating more efficient at the slightly higher RPM then it is a little slower. I know I get much better gas mileage too, at say 85 compared to 70.
At least have a leak test done on the system just to ensure you don't have a leak somewhere.
At least have a leak test done on the system just to ensure you don't have a leak somewhere.
Safety Car
Joined: Jan 2003
Posts: 4,902
Likes: 19
From: Tavernier Fl
Have you checked your radiator for cracks? My 96' was eating coolant and running hot some, when i finally found the leak it was a crack in the side tank of the radiator, it only leaked while the car was warming up, once it got hot it expanded and stopped.
~B~
~B~
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From: Mauldin sc
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Thread Starter
Racer
Joined: Dec 2004
Posts: 372
Likes: 5
From: North West, Georgia
used the test kit for the coolant ..
Your right thou fresh coolant could throw it off .
good news hearing the temps on rising RPMs are fairly normal.
I have found a leak finally.... I hope its all i need for now ..
The ring under the surge cap tank ... where the metal meets plastic.
I can turn that by hand a bit .. and there definately some leakage coming form there.
Im thinking thermo stuck .. heated it up real good ... the added heat opens that space up to allow lots of coolant out when under high temps and pressure.
Idle in the garage with cool temp and low pressure it doesnt leak however .. i gave it a good run home, when almost home blocked off part the radiator so i could get temps around 220 solid and found more than a drip ... less than a stream coming out.
for now ill use the new thermo and save the new pump on whatever rebuild/repalcement i finally decided on ... something 400hp+ im thinking before the years out
Your right thou fresh coolant could throw it off .
good news hearing the temps on rising RPMs are fairly normal.
I have found a leak finally.... I hope its all i need for now ..
The ring under the surge cap tank ... where the metal meets plastic.
I can turn that by hand a bit .. and there definately some leakage coming form there.
Im thinking thermo stuck .. heated it up real good ... the added heat opens that space up to allow lots of coolant out when under high temps and pressure.
Idle in the garage with cool temp and low pressure it doesnt leak however .. i gave it a good run home, when almost home blocked off part the radiator so i could get temps around 220 solid and found more than a drip ... less than a stream coming out.
for now ill use the new thermo and save the new pump on whatever rebuild/repalcement i finally decided on ... something 400hp+ im thinking before the years out
