in my humble opion pcv IS NOT IN ANY WAY USEABLE AS AIR LINE .. i was not anywhere close when mine failed ..it will fail from
the oil in your air line and from vibration and freezing temps will make it worse very very quickley... think of your insurance company in many states it isnt legal a google search will show up some real horror storys terry it doesnt show up on xray either
mine didnt just break it all broke into many sharp pcs terry