Coolant gauge fluctuates

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  #1  
Old 02-16-07, 03:51 PM
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Unhappy Coolant gauge fluctuates

2001 Jeep Cherokee Sport, 6 cylinder in line 4.0 liter with a/c
Today I noticed that when at idle, the idle speed would increase, and the needle in the coolant gauge would drop down to about 100 degrees. Once the car was moving forward, it would go back to the same spot as always about 200 degrees.

Is it the radiator cap? thermostat, a sensor or the gauge the most likely culprit and how simple is it to repair. Any help is greatly appreciated.
Franco
 
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  #2  
Old 02-16-07, 04:05 PM
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it sounds like the termostat is bad the temp sounds fine but therm could going bad

Originally Posted by Franco Portera View Post
2001 Jeep Cherokee Sport, 6 cylinder in line 4.0 liter with a/c
Today I noticed that when at idle, the idle speed would increase, and the needle in the coolant gauge would drop down to about 100 degrees. Once the car was moving forward, it would go back to the same spot as always about 200 degrees.

Is it the radiator cap? thermostat, a sensor or the gauge the most likely culprit and how simple is it to repair. Any help is greatly appreciated.
Franco
change the thermostat that could be your problem
 
  #3  
Old 02-16-07, 04:34 PM
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Yes, sounds like a thermostat problem. A 10-15 fix and around $6.
 
  #4  
Old 02-16-07, 08:42 PM
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I dunno fella............Thermostat stuck closed would overheat ALL the time........Stuck open would run cooler at speed with air over the radiator????........To have a 100 deg difference.............cooler when standing still and at idle would make me think problems electrical????.........Factory dashboard gauges are not known for their accuracy
 
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