Spark Plug: Service and Repair
REMOVAL PROCEDURENOTE: This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.
1. Disconnect the ignition coil electrical connectors.
2. Carefully release the number 1 spark plug wire from the clip on the number 2-3 ignition coil.
3. Remove the 2 bolts from each ignition coil.
4. Remove the number 1 spark plug wire and the number 1-4 ignition coil from the spark plugs.
5. Remove the number 2-3 ignition coil and the number 3 spark plug wire from the spark plugs.
6. Remove the spark plugs from the cylinder head.
7. Inspect the spark plugs for electrode wear, for carbon deposits, and for damage to the insulator. Refer to Spark Plug Visual Diagnosis.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. Use one of the following types of spark plugs:
^ Denso Type K20PR-U11
^ NGK type BKR6E-11
2. Set the spark plug gap to 1.0-1.1 mm (0.039-0.043 in).
3. Install the spark plugs to the cylinder head.
Tighten
Tighten the spark plug to 28 N.m (21 lb ft).
4. Install the number 2-3 ignition coil and the number 3 spark plug wire to the spark plugs.
5. Install the number 4 spark plug wire and the number 1-4 ignition coil to the spark plugs.
6. Install the 2 bolts to each ignition coil.
7. Carefully secure the number 1 spark plug wire in the clip on the number 2-3 ignition coil.
8. Connect the ignition coil electrical connectors.