Spark Plug: Testing and Inspection

INSPECTION OF SPARK PLUGS (3S-GE) (Platinum Tipped Type)

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

1. INSPECT ELECTRODE.






a. If using a megger (insulation resistance meter):
- Measure the insulation resistance.

Correct insulation resistance: 10 M-ohms or more

- If the resistance is less than specified, clean the spark plug.






b. If not using a megger:
- Quickly race the engine to 4,000 rpm five times.
- Remove the spark plug. (See step 2)
- Visually check the spark plug.

If the electrode is dry ... OK
If the electrode is wet ... Proceed to step 3






2. REMOVE SPARK PLUGS.
- Using a plug wrench (16 mm), remove the spark plug.






3. VISUALLY INSPECT SPARK PLUGS.
- Check the spark plug for thread or insulation damage. If abnormal, replace the spark plug.

* Recommended spark plug:
ND PQ16R
NGK BCPR5EP11






4. INSPECT ELECTRODE GAP.

Maximum electrode gap: 1.3 mm (0.051 in.)

- If the gap is greater than maximum, replace the spark plug.

Correct electrode gap of new spark plug: 1.1 mm (0.043 in.)

- If adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip.






5. 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 6 kg/cm2 (85 psi, 588 kPa)
Duration: 20 seconds or less

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






6. INSTALL SPARK PLUGS.
- Using a plug wrench (16 mm), install the spark plug.

Torque: 180 kg-cm (13 ft-lb, 18 N.m)