1999 Pontiac Grand Am Car Overheating over 90C

Tiny
PBARNABY
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Car is Overheating and leaking coolant - as well coolant bubbling up - how do I fix the problem
Thursday, July 24th, 2008 AT 12:30 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Could be a thermostat or the cooling fans. Check the thermostat by holding the thermostat hose and see if you feel coolant flowing and the hose would get hot after the thermostat opens, if the hose remains cold the thermostat is bad.
The cooling fans should come on at 210 degrees or so, if not check the fans by removing the connector and applying 12V to the fans, if they come on then the fan switch or relay is bad.
This engine is equipped with aluminum heads so do not let it overheat or you can warp the heads or blow a head gasket.
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Saturday, July 26th, 2008 AT 6:37 AM

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