There have been a couple posts of the outer portion of the PCV snapping off flush with the cover when trying to remove it.Just changed my PCV. The old one did not pass the pinch test but still had a muffled rattle after I removed it. The new one had a more pronounced rattle. Hopefully this one will be good for a long time.
Edit: in case someone plans to replace the PCV but does not have the service manual, the torque spec for the little bolt is 9 lb ft (108 lb in).