2008 6.6L Duramax – POSITIVE CRANKCASE VENTILATION VALVE REPLACEMENT (PASSENGER SIDE) – Removal Procedure

4. Remove the positive crankcase ventilation (PC V ) cover screws.
5. Remove the PC V cover, diaphragm, and spring.
6 . Clean and inspect the cover, diaphragm and spring.
7. Discard the diaphragm if damage is found.