I would be interested to know where the 140-170 figure came from. Usually, the manufacturers don't really specify, just that it should run "at about coolant temperature. This 140 to 170 number seems to be unrealistic considering the way the cooler works. But, engineers often provide unrealistic figures. I am going to get in on a thermostat.
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2007 GS 450h-Active Stabilizer/Radar cruise
1994 L Blue 3.70 VTD
ASE Master Automobile
ASE Advanced Level Specialist
Toyota Master Diagnostic Technician (former life)
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