How do you replace thermostat on jaguar xj8?

To replace the thermostat on a Jaguar XJ8, first ensure the engine is cool and disconnect the battery. Drain the coolant and remove the necessary components to access the thermostat housing, typically located near the engine block. Take out the old thermostat and gasket, clean the mating surfaces, and install the new thermostat with a new gasket. Finally, reassemble everything, refill the coolant, and check for leaks before starting the engine.