Nissan 21200-EN00A Thermostat Assembly

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To replace the water control valve, you need to remove the battery and, if necessary, the air filter housing. Disconnect the hoses from the coolant outlet and detach the hoses from the heater pipe. Then, remove the fasteners and detach the water control valve housing. Remove the water control valve, install a new sealing ring onto it, and insert it into the housing. Install the housing with a new gasket and bolts. Finally, refill the cooling system and check for leaks and proper water valve operation.