Spark Plug: Service and Repair

REMOVAL PROCEDURE
1. Remove the spark plug wires.
2. Loosen each spark plug one or two turns. Most spark plug are best removed from wheel wells.
3. Brush or air blast away any dirt from around the spark plugs.






4. Remove the spark plugs one at a time and place each plug in a tray marked with the corresponding cylinder numbers.

INSTALLATION PROCEDURE
1. Properly position each spark plug washer.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Inspect each spark plug gap. Adjust each plug as needed.

Specification
Spark plug gap: 1.524 mm (0.060 in).






3. Install the spark plugs one at a time with the corresponding cylinder numbers.

Tighten
^ For (IRON Head-all Subsequent Installations) tighten the spark plugs to 15 N.m (11 lb ft).
^ For new iron heads tighten the spark plugs to 30 N.m (22 lb ft).

4. Install the spark plug wires.