Thermostat: Service and Repair

Engine Coolant Thermostat Replacement (LE5/LE9)

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (GE 47716) (Cooling System Draining and Filling (GE 47716)).
2. Reposition the radiator outlet hose clamp at the thermostat cover.
3. Remove the radiator outlet hose from the thermostat cover.




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

Installation Procedure




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

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the thermostat cover bolts and tighten to 10 Nm (89 lb in).




4. Install the radiator outlet hose to the thermostat cover.
5. Position the radiator outlet hose clamp at the thermostat cover.
6. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (GE 47716) (Cooling System Draining and Filling (GE 47716)).