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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Positive Crankcase Ventilation Valve: Testing and Inspection

PCV Valve

INSPECTION

1. PCV VALVE
1. Check that the PCV valve has no deformation, cracks or other damages.
2. Check that air is discharged from (B) when air is blown into (A).






3. Check that air does not come out from (B) when air is blown into (A).






2. OTHER INSPECTIONS
Check that the PCV hose has no cracks, damage or loose part.