why does it seem like my car is making an overheating noise but thermostat gauge doesnt show hot

Asked by Sep 25, 2016 at 03:20 PM about the 1988 Pontiac Sunbird GT Turbo Convertible

Question type: Maintenance & Repair

my car sounds like it is overheating by making a bubbling noise when i shut it
off, but the thermostat guage does not show overheating

3 Answers

20

It's getting to hot probably losing the additives in the antifreeze causing it to boil . I would suggest having the coolant system flushed

98,445

The gauge maybe faulty, you might want to install a manual gauge temporarily just too make sure, the other thing is it could be a blown headgasket, it is making too much cooling system pressure and it is venting and that is causing your sound.

17,765

Head gasket failure, exhaust gas exiting out into the cooling system, Replace head gasket, get it pressure checked for cracks and if good have it resurfaced and use new gaskets.

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