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

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CVSCO & CCEVS


1. Check vacuum hoses for correct routing and valve installation. Check engine coolant level.
2. With valve installed, disconnect molded connector from valve and connect a 1/8 inch inside diameter hose to bottom port of valve.
3. With radiator top tank warm approximately 75° F, blow through hose.
4. If it is not possible to blow through the hose, replace valve.
5. Start engine and allow it to reach normal operating temperature. Connect a hand operated vacuum pump to bottom port of valve and apply 10 inches Hg vacuum to the valve. If vacuum drops more than 1 inch in 15 seconds, replace valve.