Question about 1998 Pontiac Grand Am
Car also idles really high
I assume that you have the proper mixture and levels of coolant in your radiator and plastic overflow tank. Open your radiator cap (when the engine is cold) to make sure this is the case. If not, fill as directed by your owners manual.
If the cooling system's thermostat is bad, the hot coolant coming from your engine can not circulate to the radiator in front of the car to dissipate this heat and return to the engine colder.
The odd part you describe is that cold air blows out of the heater. If your car is overheating, you should have above average heat, since your car is running hot.
A bad water pump may also prevent coolant from circulating correctly. Usually, a bad pump will show up as a puddle of coolant underneath your car-since the bearing or seals usually wear out on the pump. However, I've seen where the internal blades or impellers of the pump have worn out due to deposits in the coolant due to infrequent replacement.
Hope this helps!
Posted on Apr 02, 2014
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Posted on Jan 02, 2017
also check to see if tube that runs your climate door is not pinched or broken. the vaccum tube that runs the climate door is behind and under the battery. i had same problem a year ago and the tube was partially cut. i fixed it by cuttinga piece of aquarium tubing and spliced it back together. one other thing.....check to see if your radiator over flow cap is tight. your cap maybe bad and or cracked this would also cause the problem.
Posted on Jan 29, 2010
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