Expedition 4WD V8-281 4.6L SOHC (1998)
Spark Plug: Service and Repair
REMOVAL
CAUTION: Spark plug wires must be connected to the proper ignition coil terminal and spark plug. Mark the spark plug wire locations.
NOTE: Use compressed air to remove any debris from the spark plug well before removing the spark plugs.
1. Grasp the spark plug boot firmly and use a twisting, pulling motion to disconnect the spark plug wires from the spark plugs.
2. Remove the spark plugs.
NOTE: Remove any foreign debris from the spark plug wells with compressed air.
3. Inspect the spark plug.
INSTALLATION
1. Apply Silicone Brake Caliper Grease and Dielectric Compound D7AZ-19A331-A or equivalent meeting Ford specification ESE-M1C171-A to the
inside of the spark plug wire boots.