Spark Plug Inspection
Reference: SPARK PLUG REMOVAL AND INSTALLATION
NOTE:
The iridium spark plug has a slender center electrode that is made of a material sensitive to mechanical forces. It may be damaged easily if handled carelessly. Do not touch the center electrode of an iridium spark plug. Avoid cleaning it or adjusting its electrode gap.
Check spark plug for:
- Electrode wear
- Carbon deposits
- Insulator damage
If any abnormality is found for nickel spark plugs, adjust air gap, clean with spark plug cleaner or replace them with specified new plugs.
For iridium spark plugs, replace them with specified new plugs.
Spark plug air gap "a"
Standard: 1.0 - 1.1 mm (0.039 - 0.043 in.)
Spark plug type
Non-EVAP-leak-check model: DENSO K16HPR-U11 (Nickel)
EVAP-leak-check model: NGK SILFR6A11 (Iridium)