Positive Crankcase Ventilation: Testing and Inspection

1. Remove the ventilation hose from the positive crankcase ventilation valve.
2. Remove the positive crankcase ventilation valve from the rocker cover.
3. Reinstall the positive crankcase ventilation valve at the ventilation hose.
4. Start the engine and run at idle.
5. Place a finger at the opening of the positive crankcase ventilation valve and confirm that vacuum of the intake manifold is felt.

NOTE
- At this time, the plunger in the positive crankcase ventilation valve moves forward and backward.

6. If vacuum is not felt, clean the positive crankcase ventilation valve or replace the PCV valve.