Car is overheating

70

Asked by Jan 05, 2016 at 08:14 PM about the 2003 Pontiac Grand Am GT

Question type: Maintenance & Repair

Can stop the car from overheating
change water pump change
thermostat still overheating

1 Answer

10

If our car is a V-6 the overheating can be caused by faulty lower intake manifold gaskets. GM used plastic and rubber LIM gaskets on these engines and after a while the plastic gets brittle and breaks allowing coolant to go into the engine. This is not nearly as severe as a blown head gasket, but it's not easy or cheap to change. I have done it in around 12 hours using new Fel-Pro gaskets. Now the car runs very well. This is a very common problem with GM V-6's

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