Spark Plug: Testing and Inspection

SPARK PLUG

NOTE:
- Never use a wire brush for cleaning.
- Never attempt to adjust the electrode gap on used spark plug.
- Spark plug should be replaced every 192,000 km (120,000 miles).







a. Clean the spark plugs.

Air pressure: Below 588 kPa (6.0 kg/sq.cm, 85 psi)
Duration: 20 seconds or less







b. Check the spark plug for thread damage and insulator damage.

HINT: If abnormal, replace the spark plug.

Recommended spark plug:
SK20R11 (DENSO made)
IFR6A11 (NGK made)







c. Check the spark plug electrode gap.

Electrode gap: 1.1 mm (0.043 in.)