Engine Coolant Thermostat Replacement LZ4

1. Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement .
2. Remove wire harness clamp from thermostat housing stud (1).



3. Remove the thermostat housing bolt (1) and nut (2).
4. Remove the thermostat housing (3).
5. Remove the thermostat.

1. Install the thermostat with housing (3).

1.1.	Install a new gasket.

1.2.	Position the thermostat with the housing.

1.3.	Apply thread sealant PST 565® to the bolt threads.

Notice: Refer to Fastener Notice in the Preface section.

1.4.	Install the housing bolt (2) and nut (1).

Tighten
Tighten the thermostat housing nut and bolt to 10 N·m (89 lb in).




2. Install the wire harness clamp to the thermostat housing stud (1).
3. Install the radiator outlet hose. Refer to Radiator Outlet Hose Replacement .

Engine Coolant Thermostat Replacement LY7

1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the radiator outlet hose from the thermostat housing.
3. Remove the heater inlet and outlet hoses.
4. Remove the surge tank outlet hose.
5. Remove the thermostat housing bolts (1).
6. Remove the housing.
7. Remove the thermostat (2) and discard the thermostat gasket.

1. Install the thermostat (2) with a NEW thermostat gasket.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the thermostat housing bolts (1).

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

3. Install the surge tank outlet hose.
4. Install the heater inlet and outlet hoses.
5. Install the radiator outlet hose to the thermostat housing.
6. Fill the cooling system. Refer to Cooling System Draining and Filling .

Engine Coolant Thermostat Replacement LAT

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Reposition the radiator outlet hose clamp at the thermostat cover.
3. Remove the radiator outlet hose from the thermostat cover.
4. Remove the battery tray. Refer to Battery Tray Replacement .



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

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

Notice: Refer to Fastener Notice in the Preface section.

3. Install the thermostat cover bolts.

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




4. Install the battery tray. Refer to Battery Tray Replacement .
5. Install the radiator outlet hose to the thermostat cover.
6. Position the radiator outlet hose clamp at the thermostat cover.
7. Fill the cooling system. Refer to Cooling System Draining and Filling .