Spark Plug: Testing and Inspection

NOTICE:
^ 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. REMOVE HIGH - TENSION CORDS FROM THE SPARK PLUGS.
2. INSPECT ELECTRODE USING A MEGGER.
- Using a megger (insulation resistance meter), measure the insulation resistance.

Insulation resistance: 10 M Ohms or more

- If the resistance is less than specified, proceed to step 4.




3. REMOVE SPARK PLUGS USING A 16 MM PLUG WRENCH.
4. VISUALLY INSPECT SPARK PLUGS.
- Check the spark plug for thread damage and insulator damage.
- If abnormal. replace the spark plug.

Recommended Spark Plugs:
GPK20R11 for ND
BKR6EP11 for NGK

5. CLEAN SPARK PLUGS USING A SPARK PLUG CLEANER.
- If the electrode has traces of wet carbon, allow it to dry and then clean with a spark plug cleaner.
- If there are traces of oil, remove it with gasoline before using the spark plug cleaner.




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

6. INSPECT ELECTRODE GAP.
- If needed, correct the 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.

7. INSTALL SPARK PLUGS.



- Using a 16 mm plug wrench, install the spark plug.

Torque: 18 Nm (13 ft.lb)

8. RE-INSTALL HIGH-TENSION CORDS.