Positive Crankcase Ventilation Valve: Testing and Inspection

POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [SKYACTIV-G 2.0]

Airflow Inspection

1. Disconnect the section (A) of ventilation hose shown in the figure.






2. Start the engine and verify that vacuum is applied to the end of the disconnected ventilation hose while the engine is idling.

NOTE:
- Because it is difficult to directly inspect for the PCV valve, the PCV valve is examined by inspecting for the ventilation hose airflow condition as a simple inspection. If the PCV valve is normally operating, vacuum is applied to the ventilation hose, however, if there is a malfunction in the PCV valve, positive pressure is applied to the ventilation hose because the blow-by gas is reduced from the ventilation hose to the air hose.
- Verify the ventilation hose vacuum as follows:

- When the tip of your figure is touched the end of the ventilation hose, the tip of your figure is suctioned by the hose.
- When a thin scrap of paper is contacted the end of the ventilation hose. the paper is suctioned by the hose.

3. If it can be verified that vacuum is applied to the ventilation hose, the positive crankcase ventilation (PCV valve) system can be determined to be normal.

- If positive pressure is applied to the ventilation hose, perform from step 4 to examine the PCV valve.

4. Remove the battery cover. Removal and Replacement

5. Disconnect the negative battery cable. Removal and Replacement

6. Remove the intake manifold. Service and Repair

7. Remove the PCV valve and the oil separator as a single unit. Service and Repair

8. Verify that there is no airflow when pressure is applied to port B.






- If there is airflow, replace the PCV valve and the oil separator as a single unit. Service and Repair

9. Verify that there is airflow when vacuum is applied to port B.

- If there is no airflow, replace the PCV valve and the oil separator as a single unit. Service and Repair