Coolant Heater Replacement (Diesel)

Coolant Heater Replacement (Diesel)

Removal Procedure





1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Vac N Fill) Cooling System Draining and Filling (Vac N Fill)Cooling System Draining and Filling (Static Fill Diesel) Cooling System Draining and Filling (Static Fill Diesel).

2. Remove the right front tire and wheel. Refer to Tire and Wheel Removal and Installation Service and Repair.

3. Disconnect the engine coolant heater cord.





4. Loosen the coolant heater bolt.

5. Remove the engine coolant heater from the engine block.

6. Do not score the machined surface of the hole.

7. Grasp the plug with pliers.

8. Pull the plug from the engine block.

9. Clean the core plug hole in order to remove the following substances:

* Burrs

* Compound

* Paint

* Rough spots

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 1052196 (Canadian P/N 5264008), or the equivalent.

Note:
Avoid element contact with the inside walls of the engine block.

2. Align the coolant heater element to point towards the top of the engine.

3. Tightly push the coolant heater into the engine block.





Caution:
Refer to Fastener Caution Fastener Caution.

4. Tighten the bolt on the engine coolant heater until both of the locking wings draw tightly against the inner wall of the engine block and tighten to 2 Nm (18 lb in).





Caution:
The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

5. Connect the heater cord to the coolant heater.

6. Install the right front tire and wheel. Refer to Tire and Wheel Removal and Installation Service and Repair.

7. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Vac N Fill) Cooling System Draining and Filling (Vac N Fill)Cooling System Draining and Filling (Static Fill Diesel) Cooling System Draining and Filling (Static Fill Diesel).

8. Inspect for coolant leaks.