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Why does my car keeps overheating

Tiny
JENN1234
  • MEMBER
  • 1998 OLDSMOBILE ACHIEVA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
I have a 1998 oldsmobile achieva, the problem is my car keeps overheating, it already has a new water pump and thermostat, but since it kept overheating my friend took out the thermostat but now it's still overheating, and the fan comes on somtimes late when the car is already overheating, what could be the problem?
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Tuesday, January 18th, 2011 AT 8:54 PM

2 Replies

Tiny
DWB812
  • MECHANIC
  • 108 POSTS
The most likely cause is a faulty temperature switch that is not activating your fan(s) when the coolant gets hot. It is in the side of the radiator I believe but you should be able to trace the wires from the fan to it. Reinstall your thermostadt and replace the thermo switch for the fan(s) and run the engine up to operating temperature. If the fan kicks on at around 180-200 degrees F and off when the temp. Returns to normal you have found your problem. Good luck and I hope this helps.
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Saturday, March 26th, 2011 AT 2:20 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
First, replace the thermostat. Next, check to make sure the radiator is clean. I would flush it to be sure. Also, check to make sure none of the radiator hoses are collapsing when it is overheating.

If this problem only happens when you are in traffic or stopped, then I would focus on the cooling fans.
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Thursday, April 14th, 2011 AT 1:49 PM

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