Nissan 21200-1KC0A Thermostat Assembly

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The removal of the 1.2 litre petrol engine's thermostat involves locating it, draining the cooling system, removing the inlet manifold, disconnecting hoses and wiring, and recovering the sealing ring. For the 1.6 litre petrol engines, the process includes draining the system, disconnecting the radiator hose, removing the housing, and recovering the sealing ring. Diesel engines require removing the air cleaner assembly and vacuum pump, disconnecting wiring and hoses, and lifting the thermostat and seal. Testing involves checking if the thermostat opens in boiling water and closes as it cools. Replace if faulty. Refitting requires renewing all disturbed seals and gaskets. The cooling system should be refilled.