Question about 1999 Pontiac Grand Am GT

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My 99 overheats constantly

It will overheat just out of the blue, the thermestate will suddenly raise from the middle and stall out and after a few seconds it will drop to 0. We had a mechanic look at it last summer and he replaced the thermestate but it is doing it again. Can anyone help with some info??????

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There is a bleed screw on the top front left of the engine. Start the car and add your coolant use the bleed screw until now more air comes out, just liquids. You are still over heating beacuse the is air in the system.

Posted on Jun 07, 2008

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