2004 Chevy impala 3.4, I'm having over heating problems, it has a new water pump, radiator and thermostat. I've bleed all the air out of the system the only time it overheats is when its being driven.

Asked by Jul 14, 2015 at 11:33 AM about the 2004 Chevrolet Impala Base

Question type: Maintenance & Repair

stays at normal running temp at idle for
extended periods of time, water pump is
working all hoses get hot thermostat is
opening and closing

1 Answer


Once you're absolutely certain that you have all the air out of the cooling system if it still overheats it's probably going to be the head gasket. Have the cooling system pressure tested to be sure. These engines are notorious for head gasket failure. HTH. -Jim

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