Quote:
Originally Posted by MedSailor
So I'm not an expert, but I'll throw a few things into the mix:
The thermostat's job is to restrict cooling water for a while until the engine warms up, after that it opens and allows maximal cooling. This is to speed warm up and no thermostat is designed to close off at cruising or max rpm it's function should not affect your max operating temp.
Medsailor
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The job of the thermostat is to open and close constantly to change the water flow to keep the engine at a cirtain temp.
If the engine is running hard and creating lots of heat it may open max and then close to a mim at an idle in neututral.