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To change the thermostat on a 2000 Infiniti Q45, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the upper radiator hose from the thermostat housing, then unbolt the housing to access the thermostat. Replace the old thermostat with the new one, ensuring the gasket is properly aligned, reassemble the housing, and reconnect the radiator hose. Finally, refill the cooling system with the appropriate coolant and reconnect the battery.

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1w ago

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