How do you replace 2000 jaguar xj8 thermostat?

To replace the thermostat on a 2000 Jaguar XJ8, begin by ensuring the engine is cool and then disconnect the negative battery terminal. Drain the coolant from the radiator, and remove the upper radiator hose to access the thermostat housing. Unbolt the thermostat housing, remove the old thermostat, and clean the mating surfaces before installing the new thermostat with a new gasket. Reassemble the housing, reconnect the hose, refill the coolant, and reconnect the battery.