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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Technician Safety Information


CATALYTIC CONVERTER OVERHEATING

Use extreme caution when working under a car that has a hot exhaust. Touching the catalytic converter or the exhaust pipe near the converter can cause severe burns, and could possibly ignite clothing, shop rags, or hair. Tests involving shorting the ignition to individual cylinders (a cylinder balance test for example) should be kept as brief as possible, with ample time given between steps to allow the catalytic converter to cool down before working on or around the exhaust system.