Engine Block Heater: Service and Repair

Removal Procedure
1. Drain the coolant. Refer to Draining and Filling Cooling System.
2. Remove the heat shield from the exhaust manifold.





3. If necessary, remove the engine block core plug (2).
Use a hammer and a punch or a screwdriver to knock the core plug loose and to one side within the engine block. Remove the core plug with pliers.
4. Disconnect the electrical cord connector from the engine coolant heater.
5. Remove the screw from each end of the heater element retaining bracket.





6. Remove the bracket and the engine coolant heater from the engine block.
7. Inspect the hole in the block for smoothness. Remove any burrs or rough spots.

Installation Procedure
1. Apply a coat of petroleum jelly to the heater opening and the O-ring.

Notice: The block heater element must not touch the engine block inner wall in the installed position or damage to the engine block and the block heater could result.





2. Insert the engine coolant heater into the hole in the engine block (2).





3. Install the engine coolant heater retainer bracket over the engine coolant heater, with the bent tabs facing the engine.

Notice: Refer to Fastener Notice in Service Precautions.

4. Tighten the engine cooler heater screws.
^ Tighten the engine coolant heater screws to 14 Nm (10 ft. lbs.).
5. Install the heat shield to the exhaust manifold.
6. Connect the electrical cord connector to the engine coolant heater.

Caution: A block heater electrical cord that is damaged creates a shock hazard, and must be replaced.

Notice: 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.

Important: Do not secure the block heater cord to the brake, fuel or vacuum lines. The cord and the tie straps could chafe the lines and lead to corrosion on the lines.

7. Route and secure the cord.
8. Fill the cooling system. Refer to Draining and Filling Cooling System.
9. Inspect the cooling system for leaks.