Spark Plug: Testing and Inspection

INSPECT 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 kgf/sq.cm, 85 psi)
Duration: 20 seconds or less




b. Check the spark plug for any damage on its thread and insulator.

HINT: If damaged, replace the spark plug.

Recommended spark plug:
DENSO made: SK16R11
NGK made: IFR5A11




c. Check the spark plug electrode gap.

Electrode gap: 1.0 to 1.3 mm (0.039 to 0.051 in.)