Question about 1995 Pontiac Grand Am

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Response to high running temp. And my problem is my heater core.

I have a 1995 grand am and the temp runs a little higher than normal, it also runs cooler when I turn on the a/c. I took it in to my mechanic to remove the thermastate because, I have had cars before that ran hot or over-heated and removing the thermastate always worked. No more running hot. Anyway, he said that the termastate was already removed. It must of been removed before I bought it. Then he said that it was ok to drive it running at that temp as long as it didn't over heat. Also that if he put a thermastate in, it would most likely run hotter or over-heat a lot, and thats why the previous owner removed it in the first place.
Try running your car without a thermastate and see if it helps.
An on going problem I've been having with my grand am is, the Heater Core keeps going out every 2 to 3 years. Mechanic says it has a factory defect that keeps shorting it out. I bought it in 2000 and it just went out again. This is the 4th time. If anyone has had this problem and knows an answer on how to fix it to last longer, please let me know. It cost btw 300.00 to 500.00 to fix. The labor is a lot. You have to take the whole dash out. Thanx

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It seem that the root of your problem maybe caused by by radiator the heat exchange maybe restricted by dirty fins or corroded passages with in the radiator. This is proven when your temp goes down when your a/c is on. the airflow increases when the a/c fan is on. also make sure your fan turns on high when engine is hot. The heater core problem maybe caused by the removal of thermostat. the thermostat control the flow of cooling water and by removing it it forces more pressure to the heater core thus causing it to fail prematurely. you really need to fix the high temp problem, removing the thermostat will just contribute to more problem not to mention a slow warm up of the the engine (delayed heater reaction) and may contribute to high emmision discharge. The radiator usually cost around $150.00 + 1 hour of labor a lot cheaper than $300 - $500 bill to replace the heater core.

Posted on Oct 04, 2009


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