1995 Pontiac Grand Am Overheating

GMC
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HOTCAR2000
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  • 1 POST
i have a 95 pontiac grand am, that just has currently started to overheat very badly. I put water in it and as soon as I put it in, it starts to leak out very badly. While driving or sitting still long enough the car will heat past the 280 mark, which is in the highest temp. on the gauge, and the windows will fog up on the inside of the car and it will leak on the inside of the car on the passenger and driver side? I have been told that it is my heater core, but other opinions think it is the thermostat, what do you think is the problem and how can I fix it fast?
Apr 16, 2006 at 4:42 PM
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BURRBRIAN
  • ✓Experienced Mechanic
  • 158 POSTS
It seems to me that if it's leaking inside the car- passengers floorboard?-that you are looking at the heater core leaking. I am better on older vehicles but this is something that applys to just about all vehicles, regardless of the year or make. Pretty universal that if you have water on car floorboard it's heater core.
Changing can be a pain as you have to pull housings from under dash to get to core, but be patient and go piece by piece and you can get there, or shell out some bucks and let a shop have the headaches. Good luck
Apr 19, 2006 at 1:06 AM
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Suggested Repair

The interior coolant leak and fogged windows point to a leaking heater core rather than the thermostat. Replace the heater core by carefully removing the under-dash housings piece by piece, or have a shop do the job.

Conversation Summary

The owner of a 1995 Pontiac Grand Am reports severe overheating, coolant leaking as soon as it is added, the gauge going past 280, interior window fogging, and leaks on both the passenger and driver sides. They had been told it could be the heater core or the thermostat. The expert says water on the floorboard is a classic sign of a leaking heater core on nearly any vehicle and recommends replacing it, noting the under-dash work is tedious, or taking it to a shop.

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