CTS V8-5.7L VIN P (2004)
Engine Block Heater: Service and Repair
Coolant Heater Replacement
Coolant Heater Replacement (LS6)
Removal Procedure
1. Drain the cooling system.
2. Remove the tire and wheel, if necessary.
3. Disconnect the engine coolant heater cord from the engine coolant heater.
4. Remove the engine coolant heater.
5. Important: Take care not to damage the surface of the opening in the engine block.
Clean the opening in the engine block, remove any burrs, sealing compound, or paint.
Installation Procedure
1. Important: The engine coolant heater sealing washer may be reused if not bent, scored or otherwise damaged.
Apply a 3.175 mm (0.125 inch) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine coolant heater sealing
washer.
2. Insert the engine coolant heater.
Notice: Refer to Fastener Notice in Service Precautions.
3. Tighten the engine coolant heater.
Tighten the engine coolant heater to 40 Nm (30 ft. lbs.).