GX 470 V8-4.7L (2UZ-FE) (2004)
c. Check the spark plug for thread damage and insulator damage.
If abnormal, replace the spark plug.
d. Check the spark plug electrode gap.
Maximum electrode gap for used spark plug: 1.3 mm (0.051 in.)
If the gap is greater than maximum, replace the spark plug.
Correct electrode gap for new spark plug: 1.0 - 1.1 mm (0.039 - 0.043 in.)
e. Clean the spark plugs.
If the electrode has traces of wet carbon, allow it to dry and than clean with a spark plug cleaner.
Air pressure: Blow 588 kPa (6 kgf/sq.cm, 85 psi)
Duration: 20 seconds or less
HINT: If there are traces of oil, remove is with gasoline before using the spark plug cleaner.