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 Hose, Breather Pipe And Valve:

1. Check the crankcase ventilation hoses and connections for leaks, cracks, or clogging.
2. Start the engine and let it idle.

PCV Testing:

3. Lightly pinch the PCV hose between the PCV valve and intake manifold. There should be a clicking sound from the PCV valve. If there is no sound, replace the valve and re-test.