Thermostat: Service and Repair

Engine Coolant Thermostat Replacement (LD8)

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure




1. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement (Service and Repair).
2. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (Vac-N-Fill) (Service and Repair).
3. Using the J 38185 , reposition the radiator outlet hose clamp at the thermostat housing.
4. Remove the radiator outlet hose from the thermostat housing.




5. Remove the thermostat housing bolts.




6. Remove the thermostat housing, thermostat, and gasket from the water pump housing.
7. Discard the old thermostat housing gasket.

Installation Procedure




1. Install a NEW thermostat housing gasket into the water pump housing.
2. Install the thermostat into the water pump housing.
3. Install the thermostat housing.





Notice: Refer to Fastener Notice (Fastener Notice).

4. Install the thermostat housing bolts.

Tighten the bolts to 10 N.m (89 lb in).




5. Install the radiator outlet hose to the thermostat housing.
6. Using the J 38185 , position the radiator outlet hose clamp at the thermostat housing.
7. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (Vac-N-Fill) (Service and Repair).
8. Install the air cleaner. Refer to Air Cleaner Assembly Replacement (Service and Repair).