Cleaning and Inspection

SPARK PLUG IDENTIFICATION
- Three unique styles of platinum-enhanced spark plugs are produced. Each style is distinguished by the part number suffix letters.
- The suffix letter P indicates the center electrode is enhanced with platinum.
- The suffix letter PG indicate the ground (side) electrode is enhanced with platinum.
- The suffix letters PP indicate double platinum enhancement on both the ground (side) and the center electrode.

NOTE
If any spark plug needs to be removed for examination, each spark plug removed must be reinstalled in the same cylinder. If any spark plug needs to be replaced, use only spark plugs with the service part number suffix letters PP as shown on the engine decal.


SPARK PLUG TO CYLINDER IDENTIFICATION
- Cylinders No.1, No.2 and No.3 have a PG suffix.
- Cylinders No.4, No.5 and No.6 have a P suffix.

- Clean spark plugs as necessary using a professional spark plug cleaner. Inspect the firing tip. Replace spark plugs if they are worn or damaged.