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#1
06-05-2004, 11:13 PM
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high temp. thermostat vs. low temp. thermostat
I have a 1989 Cutlass Calais 2.5 that has been overheating. We flushed / filled the collant, replaced radiator cap, replaced thermostat. There are no leaks...just when it gets hot, water comes out the overflow. Even after all this, it still overheated. The light came on and I immediately turned AC off and the light immediately went off. I also just learned that the new thermostat is a 160 degree. For my car, there is a 195 degree, 180 degree, and 160 degree. Do I need a higher temp. thermostat? I live in Texas and it gets HOT here...I'm not sure if that's a factor when choosing a thermostat. Thank you in advance.
Amy 
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#2
06-07-2004, 11:31 PM
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Re: high temp. thermostat vs. low temp. thermostat
Usually there is a bleeder valve above the thermostat location. Make sure you open that valve while you are filling the cooling system.
You can run your vehicle and when it is at the operating temperature, try to open that valve slowly until coolant is flowing out (no more air hissing). The radiator fan should turn on normally at 220 degree and if not then probably the engine temperature switch may need to be cleaned or replaced. Check this link http://www.thirdgen.org/tech/cool8dual.pdf
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