Thermostat: Service and Repair

Engine Coolant Thermostat Replacement

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling Cooling System Draining and Filling.
2. Reposition the radiator outlet hose clamp at the thermostat housing.
3. Remove the radiator outlet hose from the thermostat housing.




4. Remove the thermostat housing cover bolts and cover.
5. Remove the thermostat.
6. Remove and discard the thermostat housing O-ring seal.

Installation Procedure




1. Install a NEW thermostat housing cover O-ring seal.
2. Install the thermostat.

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the thermostat housing cover bolts.

Tighten the bolts to 10 Nm (89 lb in).




4. Install the radiator outlet hose to the thermostat housing.
5. Position the radiator outlet hose clamp at the thermostat housing.
6. Fill the cooling system. Refer to Cooling System Draining and Filling Cooling System Draining and Filling.