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Old 07-31-2014, 03:12 PM   #7
JFP in PA
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Join Date: Feb 2005
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The OEM thermostat in the M96 starts to open at 186F, and typically is not fully open until nearly 210F. The dash gauge is typically way off, indicating around 180 or so when the actual coolant temp (read by a Porsche specific scan tool or an after market temp gauge) is commonly around 205-215F at steady state. Along with the dash gauge being nearly useless, the data you get from the AC panel is a often close second in inaccuracy.

With the oil usually running at least 10-15 degrees hotter than the coolant (steady state cruising, start pushing the car, or running it on a very hot day and the oil can get even hotter).
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