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Matt Taylor (not verified)    January 11, 2024 - 1:58PM

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Your engine can overheat if it gets stuck closed. It controls the flow of coolant to and from the engine. When your car first starts up it's supposed to be closed to allow the coolant to heat up to get your engine up to operating temperature. When it's up to temperature, it will open and allow the coolant to circulate through the radiator to cool your engine.

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