Engine Block Heater: Service and Repair

REMOVAL
1. Disconnect negative battery cable from battery.
2. Drain coolant from radiator and cylinder block. Refer to Draining Cooling System.





Fig. 55

3. Remove power cord from block heater.
4. Loosen screw at center of block heater. Remove heater assembly and O-ring seal.


INSTALLATION
1. Thoroughly clean cylinder block core hole and block heater seat.
2. (all except 4.7L Engine). Position O-ring seal on heater then insert block heater assembly with element loop pointing down.





Fig. 56

3. 4.7L Engine Only, Insert block heater assembly with element loop pointing upward (12 O'clock).
4. With block heater fully seated, tighten center screw to 2 Nm (17 in. lbs.) torque.
5. Fill cooling system with recommended coolant. Refer to Filling Cooling System.
6. Start and warm the engine. Check for leaks.