Operation CHARM: Car repair manuals for everyone.
Home >> Lincoln >> 1998 >> Navigator 4WD V8-5.4L SOHC VIN L >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Spark Plug >> Service and Repair
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Spark Plug: Service and Repair

REMOVAL
1. Remove the ignition coil.







2. Remove the spark plugs.

NOTE: Remove any foreign debris from the spark plug wells with compressed air.







3. Inspect the spark plugs.

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.







2. Adjust the spark plug gap as required.







3. Install the spark plugs.
4. Connect the spark plug wires.
pro multis · About Operation CHARM