Thermostat: Service and Repair

Thermostat and Thermostat Housing













Removal and Installation

1. Drain the engine cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.

2. If servicing the thermostat housing, disconnect the upper radiator hose from the thermostat housing.

3. Remove the 2 bolts, the thermostat housing and the thermostat. Discard the O-ring seal.
- Inspect the mating surfaces. Clean the sealing surfaces with metal surface prep and silicone gasket remover. Follow the directions on the packaging.

- If necessary, install a new thermostat with the spring facing down.

- Install a new O-ring seal.

- NOTE: Make sure the thermostat housing is seated evenly by hand tightening the 2 thermostat housing bolts prior to final tightening.

To install, tighten to 10 Nm (89 lb-in).

4. To install, reverse the removal procedure.

5. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.