1991 Buick Enine Temperature Unstable

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  #1  
Old 10-06-03, 09:28 AM
mitchtripp
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1991 Buick Enine Temperature Unstable

Hello,

I have a 1991 Buick Park Avenue that has a temperature
problem

I have replaced the thermostat, temperature sensor(unit
that sends information to the computer) and have flushed
the radiator. When replacing the thermstat the internal
parts of the block looked very clean. The temperature
always stayed at a constant 140 degrees before noticing
any problems. Now it will get to over 220 degrees while
driving in normal city traffic. I also loosened the tension
on the belt and turned the water pump to verify it turned
freely.

I went on the interstate yesterday and it stayed at about
110 degrees. As soon as I got off it started rising to over
200 degrees again. If I turn the heater on it drops back
to around 140 degrees.

The last think I will do is replace the radiator cap.

Does anyone have any other suggestions?

Thanks,



Mitch Tripp, Chesapeake, Va.
 
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  #2  
Old 10-06-03, 09:38 AM
Joe_F
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Could have an air pocket....could have gotten a defective stat.

Also may be a perfectly normal condition. Never trust the dash gauge, they are not accurate. Drop by any Autozone and have them put the car on a scanner and read the actual coolant temperature through a scanner and tell us what they are finding if you don't have your own scanner.
 
  #3  
Old 10-06-03, 09:44 AM
Member
Join Date: Aug 2003
Location: Barre,Vermont
Posts: 472
I AM NOT REALLY HEARING ANYTHING THAT IS A PROBLEM HERE.
MAKE SURE THE COOLING FAN COMES ON WHEN THAT GAUGE GETS UP THERE....
 
  #4  
Old 10-06-03, 10:26 AM
darrell McCoy
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I believe the norm thermostat for this unit is 195 Deg. The 110 or 140 you mention puzzles me. 220 is not that extreme anymore. Maybe a tad more in stop and go traffic. Actually with the temps you stated, sounds like the thermostat still is not right.
 
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