Thermostat: Service and Repair

Engine Coolant Thermostat Replacement (LZ4) (3.5L)

Removal Procedure




1. Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement (LAT) (Service and Repair)Radiator Outlet Hose Replacement (LY7) (Service and Repair)Radiator Outlet Hose Replacement (LZ4) (Service and Repair)Radiator Outlet Hose Replacement (LE5) (Service and Repair)Radiator Outlet Hose Replacement (HP5) (Service and Repair).
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.

Installation Procedure





Caution: Refer to Fastener Caution (Fastener Caution).

1. Install the thermostat with housing (3).

1. Install a new gasket.
2. Position the thermostat with the housing.
3. Apply thread sealant PST 565(R) to the bolt threads.
4. Install the housing bolt (2) and nut (1) and tighten to 10 Nm (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 (LAT) (Service and Repair)Radiator Outlet Hose Replacement (LY7) (Service and Repair)Radiator Outlet Hose Replacement (LZ4) (Service and Repair)Radiator Outlet Hose Replacement (LE5) (Service and Repair)Radiator Outlet Hose Replacement (HP5) (Service and Repair).