Spark Plug: Service and Repair

REMOVAL
1. Disconnect ignition wires from spark plugs.
2. Loosen spark plugs one-quarter 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. If any spark plug is removed and re-installed, it must be installed in the same cylinder from which it was removed. 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 replaced, use only spark plugs with part number AWSF-32PP as listed on the vehicle emission calibration identification 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. Follow removal procedure in reverse order.
2. Tighten spark plugs to 10-20 Nm (80-180 lb-in).