Engine Block Heater: Service and Repair

Block Heater





Split Ring Design










V-Lock Design









Removal

All vehicles

1. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.

2. Disconnect the block heater electrical connector.

Vehicles equipped with a split ring design block heater

3. NOTE: Use a 1 1/4 in, 12-point flare nut crowfoot wrench (such as Snap-on(R) stock number AN850820B, or equivalent) to remove the block heater.
Remove the block heater.






Vehicles equipped with a V-lock design block heater

4. Remove the block heater retaining nut and the block heater, then remove the V-lock and the threaded rod.

Installation

NOTE: Install only a V-lock design block heater.

1. Clean the engine block mating surface with Motorcraft(R) Metal Surface Prep. Follow the directions on the packaging.

2. Position the block heater and finger-tighten the nut, making sure the block heater electrical connector points to the 8 o'clock position.

3. Tighten the block heater nut.
- Tighten to 3 Nm (27 lb-in).


4. NOTICE: Route the block heater power cable away from hot or rotating components, or the cable can be damaged.

Connect the electrical connector.


5. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.