Engine Coolant Thermostat Replacement (LZ4)

Engine Coolant Thermostat Replacement

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill-LY7, LZE, LZ4) Cooling System Draining and FillingCooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716).
2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement 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.

Installation Procedure




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

Caution: Refer to Fastener Caution Fastener Caution.

3. Install the thermostat housing bolt/stud and tighten to 10 Nm (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 Air Cleaner Outlet Duct Replacement.
7. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill-LY7, LZE, LZ4) Cooling System Draining and FillingCooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (GE 47716).
8. Inspect the system for leaks.