Quote:
Originally Posted by Yimmithir
Well Lube Mobile fixed the thermostat, albeit some what reluctantly. The mechanic still maintains that a cooler thermostat is the way to go. Anyway he fitted a 91 degree thermo after allegedly calling Jeep and they confirmed it was ok.
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That is complete crap! Fitting a lower thermostat will not stop over heating at all. If you are generating more heat than the radiator can control, the thermostat fully opens. Once fully open, the temperature will rise to the same point regardless of what temperature you started at. You may save a minute by having it fully open earlier, but that is all.
The stock themostat is 95* and not 91*. You are causing more wear and maybe more fuel depending of what exact temperature the ECU leans out and starts using the O2 sensor to regulate the temperature once at the 'correct' operating temperature. Did you know that you increase the wear rate 4 times by running at 160*F instead of 180*F for instance!