We are not losing collant but it overheats what is causing the problem. Is there a problem with this vehicle. 2005 Montana VS6

Asked by Nov 28, 2016 at 06:27 PM about the Pontiac Montana SV6

Question type: Maintenance & Repair

I have replace thermostate flushed the collant still have the problem.

4 Answers

76,545

Make sure the cooling fans work. If the radiator is really dirty it will still overheat even if everything else is good. Try a back flush kit. I think Prestone makes one.

825

Flush and drain fill with good antifreeze

68,255

Water pump,

15

My experience was that the gaskets were bad and had to be replaced. After having them replaced, problem has disappeared and have put another 100,000 miles with no overheating.

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