Notice: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.

Important: Remove any water and debris from the spark plug holes before spark plug removal with compressed air.

1. Remove the ignition coils. Refer to Ignition Coil Replacement.
2. Remove the spark plugs.
3. Inspect the spark plugs. Refer to Spark Plug Inspection.

Important: DO NOT coat the spark plugs with anti seize compound. Over torquing could occur and damage to the cylinder head threads may result.

1. Check the gap on the spark plug(s), using around wire type spark plug gap gage. Refer to Ignition System Specifications.
2. Install the spark plugs.

Tighten
Tighten the plugs to 20 N·m (15 lb ft).

3. Install the ignition coils. Refer to Ignition Coil Replacement.