Coolant Heater Replacement L18

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



3. Remove the engine block heater from the engine block.

1. Apply thread sealant GM P/N 12346004 or equivalent to the threads of the engine block heater.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the engine block heater to the engine block.

Tighten
Tighten the engine block heater to 60 N·m (44 lb ft).




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