Navigator 4WD V8-5.4L DOHC VIN R (2001)
Engine Block Heater: Service and Repair
Block Heater
Removal and Installation
1. Drain the engine cooling system.
2. Disconnect the (A) block heater wire extension from the (B) block heater wiring and remove.
3. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension
vehicle. This can be accomplished by turning off the air suspension switch located in the RH kick panel area. Failure to do so may result
in unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations. Failure to follow
these instructions may result in personal injury.
Raise and support the vehicle.
4. Disconnect the (A) block heater wiring from the (B) block heater.
5. Remove the block heater.
1. CAUTION: Do not loosen the screw more than necessary for removal.
Loosen the screw.
2. Twist and slide the block heater to release the retainer clip and remove. Discard the retainer clip.
6. NOTE: To ease installation, coat the block heater seal and the cylinder block hole with grease.
NOTE: If equipped with air suspension, reactivate the system by turning on the air suspension switch.
