Spark Plug: Service and Repair

REMOVAL and INSTALLATION
1. Disconnect ignition wires from spark plugs.
2. Loosen spark plugs 1/4 turn and use compressed air to remove any dirt or foreign material from spark plug areas of cylinder heads (6049).
3. Remove spark plugs.

NOTE: Three different styles of platinum-enhanced spark plugs are produced for the 4.6L (4V) engine. Each spark plug has a different part number and use. AWSF-32E spark plugs have a platinum-enhanced center electrode and are used in cylinders 5, 6, 7 and 8. AWSF-32EG 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. When any spark plug is replaced, use only spark plugs with part number AWSF-32EE (as listed on the Vehicle Emission Control Information [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. Inspect and, if necessary, replace spark plugs. Check and adjust spark plug gap.
5. To install, reverse Removal procedure. Tighten spark plugs to 9-20 Nm (7-15 lb ft).