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Old 11-26-2008, 09:53 AM   #2
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Join Date: Jun 2006
Location: VA
Posts: 3,582

1995 SL2
Default Re: '93 SL1 Heat and Engine Temp Issues

Your thermostat is probably stuck open (or missing). Thus you have full flow through the radiator at all times. The air flow through the radiator cools the coolant well below the designed operating temperature when the car is moving over around 20 MPH. (In cold winter weather it may never get above 1/8 scale.) When stopped, no air flow until the fan kicks on (just below the red mark on the temp gauge) so the car will warm up.

A working t-stat will regulate to coolant temp to around 3/8 scale ont he temp gauge, you will have good cabin heat, and improved fuel economy.


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