Coolant Heater Replacement (L18)

Coolant Heater Replacement (L18)

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling Cooling System Draining and Filling.
2. Disconnect the heater cord from the coolant heater.
3. Remove the engine coolant heater from the engine block.

Installation Procedure




1. Coat the O-ring seal and the cleaned surface of the plug opening with water resistant high-temperature grease lubricant GM P/N 12346004 or the equivalent.

Notice: Refer to Fastener Notice in Cautions and Notices.

2. Install the coolant heater.

Tighten the engine coolant heater to 50 Nm (40 lb ft).

3. Connect the heater cord to the coolant heater.
4. Fill the cooling system. Refer to Cooling System Draining and Filling Cooling System Draining and Filling.