Thermostat: Service and Repair

Thermostat Replacement (LE5)

Removal Procedure




1. Drain the cooling system. Refer to Draining and Filling Cooling System (LY7, LZ4, LZ9 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) Draining and Filling Cooling System (LE5 Static Fill) .
2. Reposition the radiator outlet hose clamp at the surge tank.
3. Remove the radiator outlet hose from the surge tank.




4. Reposition the radiator outlet hose clamp at the thermostat housing.
5. Remove the radiator outlet hose from the thermostat housing.
6. Remove the surge tank outlet hose from the thermostat housing.




7. Remove the thermostat housing cover bolts and cover.
8. Remove the thermostat.
9. 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.

Notice: Refer to Fastener Notice .

3. Install the thermostat housing cover bolts.

Tighten the bolts to 10 N.m (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. Install the radiator outlet hose to the surge tank.
7. Position the radiator outlet hose clamp at the surge tank.
8. Fill the cooling system. Refer to Draining and Filling Cooling System (LY7, LZ4, LZ9 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) Draining and Filling Cooling System (LE5 Static Fill) .