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

Localized Testing (Spot Testing)

Localized testing may be done either using water or air.

Localized Testing (Spot Testing):




1. Begin the test at the base of the suspected area and continue up slowly until the leak is located.

Water Hose Test:




2. Pinpoint the leak area before any repair is made. Random repair may only temporarily restrict water entry and make future diagnosis and repair more difficult.
3. Continue localized testing in the same general area in order to confirm that all of the leaks have been located.