Thermostat: Service and Repair

Thermostat - 3.5L GTDI













Removal and Installation

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

2. Remove the Air Cleaner (ACL) outlet pipe.

3. NOTICE: Cover the accessory drive belts to prevent coolant contamination of the belts.
Completely cover the accessory drive belts with waterproof plastic.


4. If installing a new coolant connector, release the clamp and disconnect the lower radiator hose.

5. Remove the bolts and detach the coolant inlet connector.
- To install, tighten to 10 Nm (89 lb-in).


6. Remove the thermostat and the O-ring seal.
- Discard the O-ring seal.


7. To install, reverse the removal procedure.
- Install a new O-ring seal and lubricate it with clean engine coolant.


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