Thermostat 186F but engine at 210F?
#3
Moving to a lower temp T stat just slows down how quick your motor reaches full operating temp, then places more cooling burden on the radiator. Modern GM vehicles were designed to run at a sweet spot of 195-215F (depending upon model) for emissions efficiency as well.
#4
Update...
Recently the 160F thermostat was installed with new GM coolant. During normal driving the engine temp was less than 180F. As soon the A/C was on, the engine temp goes to 197F sometimes 200F. But when the A/C was turn off it return to the 180F range.
Recently the 160F thermostat was installed with new GM coolant. During normal driving the engine temp was less than 180F. As soon the A/C was on, the engine temp goes to 197F sometimes 200F. But when the A/C was turn off it return to the 180F range.
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