I have a 2001 Pontiac grand prix 3.1. I have replaced the head gasket, and water pump amd I have done a radiator flush on it and it still sounds like the coolant is boiling in side of the radiator within the first 5 to 10 mins of me running the car... any suggestions?
You'll need to bleed the air out of it. There is a bleed screw on top of the thermostat housing. Open the valve with a 7 mm socket and run the engine until the thermostat opens. Continue to run the engine until only coolant comes out the little hole, then hand tighten it down. If you use a wrench, you will sheer the screw right off
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