id0112q30030d4
Purpose, Function
Construction
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Operation
1.When the engine coolant temperature is low, the thermostat valve closes and engine coolant circulates without passing through the radiator.
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2.When the engine coolant temperature is 86.5—89.5 °C {188—193 °F}, the thermostat valve starts to open and the engine coolant passed through the radiator flows to the engine.
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