Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Spark Plug: Adjustments

NOTE: Platinum tipped spark plugs can be identified by blue lines on the ceramic. Do not reuse them by cleaning or regapping. If platinum tip gap exceeds 0.051 in (1.3 mm) replace spark plugs.

Spark Plug Gap:





Check plug gap, using a plug gap gauge, and adjust if necessary--by bending the side (ground) electrode.

Spark Plug Gap: 0.039 - 0.043 in (1.0 - 1.1 mm)