Spark Plug: Testing and Inspection

PROCEDURE

CAUTION: Never use a wire brush for cleaning. Never attempt to adjust the electrode gap on a used spark plug. Spark plugs should be replaced every 100,000 km (60,000 miles).

1. Visually Inspect Spark Plugs.





- Check the Spark Plug for thread damage and insulator damage.
- If abnormal, replace the Spark Plug. Recommended Spark Plug:

PK20R11 for ND
BKR6EP11 for NGK





2. Inspect electrode gap.
- If the gap is greater than maximum, replace the Spark Plug.

Maximum electrode gap: 1.3 mm (0.051 in)

- Correct electrode gap of new Spark Plug.

Gap: 1.1 mm (0.043 in)

NOTE: If adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap on the used plug.





3. Clean Spark Plugs
- If the electrode has traces of wet carbon, allow it to dry and then clean with a Spark Plug cleaner.

Air pressure: Below 588 kPa (85 psi).
Duration: 20 seconds or less.

NOTE: If there are traces of oil, remove it with gasoline before using the spark plug cleaner.

4. Reinstall Spark Plugs
- Using a 16 mm plug wrench, install the Spark Plug.

Torque: 18 N.m (13 ft lb)

5. Reconnect high-tension cords To Spark Plugs.