Spark Plug: Service and Repair
REMOVAL1. Disconnect ignition wires from spark plugs.
2. Loosen spark plugs a 1/4 turn and remove dirt or foreign material from spark plug areas of cylinder heads with compressed air.
3. Remove spark plugs.
NOTE: Three different styles of Platinum enhanced spark plugs are produced for this engine. Each plug has a different part number, and use. AWSF-32P spark plugs have a platinum enhanced center electrode and are used in cylinders 5, 6, 7, and 8. AWSF-32PG spark plugs have a platinum enhanced ground (side) electrode, and are used in cylinders 1, 2, 3, and 4. If any spark plug is removed and re-installed, it MUST be installed in the same cylinder from which it was removed. If any spark plug is replaced, use only spark plugs with part number AWSF-32PP (as listed on the VECI label). This replacement spark plug has double platinum enhancement on both the center and ground electrode and may be used in all eight cylinders.
4. Check and adjust spark plug gap.
NOTE: Refer to the Spark Plug Inspection Chart to determine the condition of the spark plugs.
INSTALLATION
1. To install, reverse Removal procedures.
2. Tighten spark plugs to 9-20 Nm (7-15 ft lb).