Thermostat: Service and Repair

Engine Coolant Thermostat Replacement

Removal Procedure

1. If equipped with an automatic transmission, remove the exhaust manifold. Refer to Exhaust Manifold Removal Service and Repair.
2. Drain the cooling system. Refer to Cooling System Draining and Filling Service and Repair.






3. Remove the thermostat housing to water pump feed pipe bolts.






4. Remove the thermostat housing to water pump feed pipe.






5. Remove the thermostat.

Installation Procedure






1. Install the thermostat.






2. Install the thermostat housing to water pump feed pipe.






Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the thermostat housing to water pump feed pipe bolt.

Tighten
Tighten the thermostat housing to water pump feed pipe bolt to 10 Nm (89 lb in).

4. If equipped with an automatic transmission, install the exhaust manifold. Refer to Exhaust Manifold Removal Service and Repair.
5. Fill the cooling system. Refer to Cooling System Draining and Filling Service and Repair.