Impala V6-3.5L (2008)
Thermostat Housing: Service and Repair
Engine Coolant Thermostat Housing Replacement (RPOs LZE, LZ4, LZG) (3.5L, 3.9L)
Removal Procedure
1. Drain the cooling system. Refer to Cooling System Draining and Filling (9C1, 9C3 Static Fill) (See: Service and Repair)Cooling System Draining
and Filling (LZE, LZ4, LZG, 9C1, 9C3, GE47716 Fill) (See: Service and Repair)Cooling System Draining and Filling (LZE, LZ4, LZG, Static
Fill) (See: Service and Repair) .
2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement or 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 (3.5L shown, 3.9L similar).
5. Remove the thermostat housing bolt/stud.
6. Remove the thermostat housing and gasket.
7. Clean the gasket surfaces.