Positive Crankcase Ventilation Valve: Testing and Inspection

PCV Valve Inspection

1. Remove PCV valve referring to PCV Valve Removal and Installation
2. Connect PCV valve to hose and install plug to cylinder head cover hole.
3. Run engine at idle.
4. Place your finger over end of PCV valve (1) to check for vacuum.
If there is no vacuum, check for clogged valve. Replace as necessary.






5. After checking vacuum, stop engine and remove PCV valve (1).
Shake valve and listen for rattle of check needle inside the valve. If valve does not rattle, replace PCV valve.






6. After checking, remove plug and install PCV valve.
7. Install engine cover.