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Old 01-21-2009, 06:10 AM
CrazyHorst CrazyHorst is offline
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Re: grand prix overheating

It also sounds to me like you have blown out a headgasket from the combustion chamber into the water jacket.

This will boil the coolant internally (~800 psi peak cylinder pressure vs. 50 psi maximum pressure in the water jacket).

Also keep in mind a 3100 has iron block and aluminum heads which tend to "scrub" the head gasket into failure (over a long period of time) due to the different expansion rates of the metals.
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