GS 350 RWD V6-3.5L (2GR-FSE) (2007)
c. Check for damage to the spark plug threads and insulated area.
NOTE:
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Do not damage the iridium or platinum chip areas.
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If the spark plug is very dirty as a result of combustion, etc., replace it.
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If replacing the spark plug with a new one, do not remove the new spark plug's protective cap until immediately before installing it.
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If the spark plug is dropped, replace it.
If there is any damage, replace the spark plug.
d. Reference:
Maximum electrode gap for a used spark plug: 1.4 mm (0.055 in.)
If the gap is greater than the maximum, replace the spark plug.
Electrode gap for a new spark plug: 1.0 to 1.1 mm (0.039 to 0.043 in.)