WHAT'S WRONG WITH MY COOLING SYSTEM?
2003 Pontiac Grand Am • 297,000 miles
Ok, the car started pushing coolant out of the overflow. Also boiling in the rad. Coolant seemed to be circulating so not the water pump. No coolant in the oil and no oil in the coolant and no white smoke. Not the head gasket. So, Had a mechanic replace the thermostat. He has 30 yrs experience so not backwards. Car is still overheating but not pushing out coolant. What's the problem? Car is an 03 grand am gt.
Cooling fans operating?
Yes, fans are working. It's got the 3.4 as well. This really has me confused. I'm thinking maybe blockage but I'm not sure. Everything seems to be doing what its supposed to but it just overheats. Oh..and from cold, it heats up quickly.
Suspect radiator blockage when hot feel radiator any cool spots?
Yes. blowing cold air.
Oops misread the reply. haven't really felt the rad but last night when it overheated all the supports on top seemed cold.
Does top hose get hard and feel hot? hjas radiator cap been tested to hold pressure? bottom hosewarm and not collapsed?
No, top hose is not really hot or hard. Rad cap seems ok. may try a new one. not sure about bottom hose.
Was Air bleed valve opened when filling?
No. could it be so simple as air lock?
Yes if air bleed valve was not opened
June 8, 2012.
June 8, 2012.
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