Important: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.

1. Remove the accessary drive belt. Refer to Drive Belt Replacement - Accessory in Engine Mechanical - 6.0L.



2. Remove the radiator outlet hose.



3. Remove the water pump inlet bolts.
4. Remove the water pump inlet and thermostat from the water pump.

Notice: Refer to Fastener Notice in the Preface section.




1. Install the thermostat and water pump inlet to the water pump.
2. Install the water pump inlet bolts.

Tighten
Tighten the water pump inlet bolts to 15 N·m (11 lb ft).




3. Install the radiator outlet hose.
4. Install the accessory drive belt. Refer to Drive Belt Replacement - Accessory in Engine Mechanical - 6.0L.