1995 Pontiac Grand Am Overheating

HERC1218

MEMBER
1995 PONTIAC GRAND AM
4 CYL
FWD
AUTOMATIC
100,000 MILES

I have aproblem with the engine overheating within 10 minutes of starting. It had no thermostat so I am putting one in. The aotuostore parts guy said you have to bleed the lines so that there is no air in there.I can't seem to find where the bleed plug is. Also how do you know if your water pump isn't working, could that be the problem.

3 Replies

BLACKOP555

MECHANIC
10,371 POSTS

The easiest way to bleed hte lines is to jack the front end up on the vehicle and let it run till warm, then slwly add fluid into the radiator untill it is full, do this while squeezing the upper hose to "burp" all air out.

To check the water pump with the radiator cap on, and engien warm squeeze the upper radiator hose, it shoudl build up pressure and when you release your grip on the hose you should feel water flow by, if not the pump is bad and needs replacing.

Are your cooling fans turning on?

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Thursday, April 24th, 2008 AT 5:30 PM

HERC1218

MEMBER
2 POSTS

Yes they are. This grand am does not have a radiator cap, you have to fill it from the overflow resovoir.

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Friday, April 25th, 2008 AT 7:30 PM

BLACKOP555

MECHANIC
10,371 POSTS

Does the upper radiator hose build up pressure?

The bleed port shoudl be on the thermostat cap or sometims there is a port on or near the throttle body.

A quick check if there is air in your system is if both heater core hoses and upper and lower radiator hoses are hot, then there is no air.

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Friday, April 25th, 2008 AT 8:11 PM