31686045 Thermostat housing for 2016 VOLVO V40 S60 V60 V70 S90 OEM 31686046

Description

A thermostat is a valve that controls the flow of coolant. When the engine is cold started, the coolant temperature is low. At this time, the thermostat closes the coolant flow channel to the radiator, so that the coolant flows directly into the engine cylinder block or cylinder head water jacket through the inlet of the pump, and the coolant temperature rises rapidly. If no thermostat is installed, the coolant with low temperature will return to the engine after cooling by the radiator, and the temperature of the coolant will not rise for a long time, and the engine will run at low temperature for a long time. At the same time, the warm air system in the carriage, the coolant heating intake pipe, and the carburetor preheating system can not play a role for a long time.

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