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1991 Pontiac Lemans car is overheating

Tiny
JENNI420
  • MEMBER
  • 1991 PONTIAC LEMANS
  • 89,000 MILES
I just replaced the timing belt, water pump, and thermostat, and it will overheat out of nowhere, usually when it is cool out. It will go for days or weeks without doing it. It has also overheated when we are sitting in a drive thru or when the motor is idling
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Friday, September 6th, 2013 AT 6:35 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
First check if the radiator fan is turning on when the engine gets hot. If it is, consider having your mechanic do a chemical test at the radiator to check for a leaking cylinder head gasket. Since the problem doesn't act up all the time, that test must be done while the overheating is occurring to be accurate.
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Friday, September 6th, 2013 AT 7:53 PM

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