Grand Prix V8-5.3L (2007)
Thermostat Housing: Service and Repair
Engine Coolant Thermostat Housing Replacement (RPO LS4)
Tools Required
J 38185 Hose Clamp Pliers
Removal Procedure
1. Partially drain the cooling system.
2. Use the J 38185 in order to reposition the hose clamp from the water outlet housing.
3. Remove the radiator inlet hose from the water outlet housing.
4. Remove the water outlet housing bolts (302).
5. Remove the water outlet housing (303) and O-ring seal (304).
6. Remove the thermostat (305).
7. Clean and inspect the water outlet housing O-ring seal mating surfaces.
Installation Procedure
Notice: DO NOT use cooling system seal tabs, or similar compounds, unless otherwise instructed. The use of cooling system seal tabs, or similar
compounds, may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine
overheating and/or damage to the cooling system or the engine components/assembly.
