Spark Plug: Service and Repair
REMOVAL1. Disconnect the battery ground cable.
NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the adaptive strategy.
Spark Plug Wire Boot Removal:
2. Remove the distributor-to-spark plug wires from the spark plugs using Spark Plug Boot Puller D79P-6666-A or equivalent.
3. Loosen the spark plugs with a suitable deep well socket, then blow any loose dirt out of the spark plug wells using compressed air.
4. Remove the spark plugs.
INSTALLATION
1. Install the spark plugs into the cylinder head. Tighten to 20-30 Nm (15-22 lb ft).
2. Whenever a distributor-to-spark plug wire is removed for any reason from the spark plug or distributor cap, or a new distributor-to-spark plug wire is installed, Silicone Dielectric Compound D7AZ-19A331-A (Motorcraft WA-10) or equivalent meeting Ford specification ESE-M1C171-A must be applied to the distributor-to-spark plug wire boot before the distributor-to-spark plug wire is connected. Using a small, clean tool, coat entire interior surface of the boot with Silicone Dielectric Compound D7AZ-19A331-A (Motorcraft WA-10) or equivalent meeting Ford specification ESE-M1C171-A.
NOTE: The distributor-to-spark plug wires are of differing lengths and are numbered to prevent incorrect connection. If in doubt, refer to the distributor cap and the firing order, 1-3-4-2, reading counterclockwise.
3. Connect the distributor-to-spark plug wires, pushing the connector and boot tightly onto each spark plug.
4. Connect the battery ground cable.