2001 Pontiac Sunfire engine runs hot

Tiny
JUDYF
  • MEMBER
  • 2001 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 12,500 MILES
Over a month ago my car started to run hot. My mechanic replaced the thermostat and still ran hot. Then I brought it to the ponitac dealer and they said that it could be the head gasket. I took it back to my mechanic and he stated that it was hard to believe since the car hasn't lost any fluid. So he replaced the water pump and radiator. Car still ran very hot. 5 days ago a new head gasket was put in and still to my mechanics dismay the car ran very hot once again. So what else could it be? Any suggestions would be appreciated. This is a very good running car even when the car is pinned on hot. Thank You
Tuesday, July 29th, 2008 AT 10:31 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the radiator for clogging and water pump is it pumping? Oil is it milky colored?

One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad.
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Wednesday, July 30th, 2008 AT 11:33 PM

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