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)

Or, hide this message: temporarily or permanently

Spark Plug: Service Precautions

WARNING: The tapered seat plugs for this application are torque-critical! It is imperative that 17.6 Nm ± 2 (13 ± 2 ft. lbs.) is NOT exceeded!