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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Positive Crankcase Ventilation: Testing and Inspection

PCV Testing:

1. Warm engine to operating temperature and run at idle.
2. Disconnect PCV valve with ventilation hose.
3. Block valve opening and verify vacuum is felt.
4. Remove valve. Blow through port A and verify air exits port B.
5. Blow through port B and verify no air flow from port A.
6. If not as specified, replace valve.
7. Always inspect hoses and replace as needed.