10:36100k Mile Service Ram 1500 Truck 4th Gen 2008-18
1A Auto: Repair Tips & Secrets Only Mechanics Know
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THERMOSTAT
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9:14About this part
A thermostat is a temperature-controlled valve that regulates coolant flow to keep the engine at its working temperature.
It stays closed when the engine is cold so it warms up quickly, then opens to let coolant reach the radiator as the engine heats up.
The thermostat sits in the engine's coolant circuit. The correct thermostat matches the engine and its opening temperature.