2004 pontiac grand prix

Asked by Mar 10, 2018 at 10:25 AM about the 2004 Pontiac Grand Prix

Question type: Maintenance & Repair

I replaced the thermostat and water pump
on my 2004 pontiac grand prix (non
supercharged) and its still over heating.
What do i do next?

1 Answer


Bleed the trapped air out of the cooling system. There is a bleeder valve near the thermostat housing. It also seems to help having the car parked facing uphill while you do that, or maybe up on ramps. As long as there's air in the system you will have overheating problems.

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