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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Localized Testing (Spot Testing)



Localized Testing (Spot Testing)

Important: Pinpoint the leak area before making any repair. Do not perform random repairs. Random repairs temporarily restrict water entry and make future diagnosis and repair more difficult.



Perform the localized testing with either water or air. Begin testing at the base of the suspected area. Continue testing the suspected area until you locate the leak.


Continue the localized testing in the same general area in order to locate all possible leaks.