Overheating 1999 Pontiac Sunfire

Asked by Nov 17, 2012 at 08:47 PM about the 1999 Pontiac Sunfire

Question type: Maintenance & Repair

I have an overheating problem with my 1999 Pontiac Sunfire with a 2200 engine.  I have changed the water pump, radiator cap and thermostat. My oil looks good and there is no coolant burn off smell when the car is   running.  Any ideas on what could be causing this issue.

9 Answers


Only things I can think of is 1. bleed the air out of the system if there is a coolant bleeder. 2. coolant system flush 3. that cooling system additive that makes it work better - Water Wetter is the name. Good luck

8 of 8 people found this helpful.

When does it over heat? When it's sitting still or while its driving or both.

7 of 7 people found this helpful.

Take off the coolant cap smell inside, does it have an exhaust smell

7 of 7 people found this helpful.

May be cooling fan, if its not turning on, can u run it down the highway and its ok but as soon as u stop at a stop light it will heat up. If that happens ur fan is not operating

4 of 4 people found this helpful.

And if it runs fine while sitting still and overheats while driving then you ran something over and it broke the front air dam.

3 of 3 people found this helpful.

how do you check transmission fluid in a 1999 pontiac sunfire

13 of 13 people found this helpful.

@mrjkg http://www.cargurus.com/ Cars/Discussion-t2254_ds476437 ......delete the spaces

1 of 1 people found this helpful.

how much scale and corrosion is in the radiator? maybe a good radiator cleaning or replacement is in order......

2 of 2 people found this helpful.

how to I check if power is going to fan, is there a fuse associated with power to fan

13 of 13 people found this helpful.

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