Engine Coolant Thermostat Replacement LX9

Tools Required

J 38185 Hose Clamp Pliers

1. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.5L.
2. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
3. Use the J 38185 in order to reposition the hose clamp from the water outlet housing.
4. Remove the radiator inlet hose from the water outlet housing.



5. Remove the water outlet housing bolts.



6. Remove the water outlet housing.



7. Remove the thermostat.
8. Clean and inspect the water outlet housing gasket mating surfaces.

1. Install the thermostat.



2. Install the water outlet housing.

Notice: Refer to Fastener Notice in the Preface section.




3. Install the water outlet housing bolts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

4. Install the radiator inlet hose to the water outlet housing.
5. Use the J 38185 in order to reposition and install the hose clamp to the water outlet housing.
6. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.5L.
7. Fill the cooling system. Refer to Cooling System Draining and Filling .

Engine Coolant Thermostat Replacement LZ9

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
3. 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 bolt/stud.
6. Remove the thermostat housing and gasket.
7. Remove the thermostat.
8. Clean the gasket surfaces.

1. Install a NEW thermostat.
2. Position a NEW gasket and the thermostat housing to the engine block.

Notice: Refer to Fastener Notice in the Preface section.

3. Install the thermostat housing bolt/stud.

Tighten
Tighten the bolt/stud 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 air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
7. Fill the cooling system. Refer to Cooling System Draining and Filling .
8. Inspect the system for leaks.

Engine Coolant Thermostat Replacement L61

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
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. Proceed to step 11.



6. Remove the thermostat housing cover bolts and cover.
7. Remove the thermostat.
8. Remove and discard the thermostat housing O-ring seal.

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

Notice: Refer to Fastener Notice in the Preface section.

3. Install the thermostat housing cover bolts.

Tighten
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 Cooling System Draining and Filling .