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

Ignition Cable: Service Precautions

Silicone spark plug boots form a tight seal to the spark plugs. The boot should be twisted 1/2 turn while removing. DO NOT pull on the wire to remove it from a spark plug. Pull on the boot, or use a tool designed for this purpose. Care should also be exercised when connecting a timing light or other pick-up equipment. DO NOT force anything between the boot and wiring, or through the silicone jacket. Connections should be made in parallel using an adapter.