Quote:
Originally Posted by TheRealSy90
You need a thermostat to allow the coolant in the radiator time to actually cool down.
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It's actually opposite. By not running a thermostat, there's nothing to keep the engine running at optimum temp. This would be really noticeable on cold days when the coolant is flowing through the radiator unrestricted, the engine may actually never reach op temp. Basically the thermostat keeps the engine running at op temp, opening as needed.