98 sunfire overheating

10

Asked by Billy Jan 25, 2018 at 07:12 PM about the 1998 Pontiac Sunfire 4 Dr SE Sedan

Question type: Maintenance & Repair

I have a 98 sunfire that started overheating when I
bought it. Figured out pretty easily that it was the
radiator fan not turning on. But, 6 months later here
we are and the radiator fan IS working. So I noticed
something weird about it though. First it random,
some days this car runs like a dream and stays in
the middle all day. Other days, when in park and
idling it looks like the picture. Second  it started
acting up today. So I got it home and sat in park
watching the heat slowly rise. Then when it was
just at this point in the picture I shifted the car into
drive, and  the heat dropped by about 10 to15
degrees.

3 Answers
475

dredlang876 answered 6 years ago

By only putting the car in drive (D not moving)the temp decreased, I think you might need a fan timer module but please get a second opinion.

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10

Billy answered 6 years ago

All suggestions are appreciated. I will keep everyone updated with a solution or things that I've tried. I do not know when I will be able to work on it though (money, time, etc.)

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26,815

taver91 answered 6 years ago

You may want to check your thermostat. It might be failing to open or, if it has been replaced, it may be opening at a higher than recommended temp.

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