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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Positive Crankcase Ventilation: Testing and Inspection






CRANKCASE VENTILATION SYSTEM INSPECTION
1. Remove the rocker cover side of the PCV valve hose.
2. Start the engine and run at idle.
3. Place a finger at the opening of the PCV valve, and confirm that vacuum of the intake manifold is felt.

NOTE: At this time, the plunger in the PCV valve moves forward and backward.

4. If vacuum is not felt, replace the PCV valve.