Mechanics

OVERHEATING

1998 Pontiac Grand Prix • 170,000 miles

What could be the problem to my car overheating, I did a pressure test and the pressure held up. I heard that others have had problems with the intake manifold but I do not know if mine has that problem. What should I try or check?
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Charlie1229
June 28, 2012.




Did you check/test the thermostat-if not do it and also check the water pump if its pumping coolant thruout the egnine if okay-get a chemical tester and check for combustion leak

Tiny
Rasmataz
Jun 28, 2012.
The thermostat seems to be working, how do I check the water pump?

Tiny
Charlie1229
Jun 28, 2012.
If the t-stat is working, flush the system and also, make sure there are no collapsed hoses.

What all hoses do I have to look for besides the ones going to, and coming from, the radiator?
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Tiny
Charlie1229
Jul 4, 2012.
Also I think I have a coolant leak and thats why it is overheating, but I have no idea where it could be coming from since the pressure test held up

Tiny
Charlie1229
Jul 4, 2012.
What motor do you have

Tiny
Mikederouin88
Jul 4, 2012.
I have the 3.8 but not the super charged

Tiny
Charlie1229
Jul 4, 2012.
There are two plastic elbows by the tension pulley that commonly leak on that motor you can buy them off the help isle at any parts store.

Tiny
Mikederouin88
Jul 4, 2012.
Are they by each other because I've changed one of them before but I do not know where the other one is

Tiny
Charlie1229
Jul 4, 2012.
They are right by each other. When u buy them they should come together. And when they leak it burns off the monifold before it hits the ground.

Tiny
Mikederouin88
Jul 4, 2012.

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