no the idea of the catch can is that the oil that comes through the pcv valve is 'caught' in teh cannister... if your piston rings aren't sealing, then gases from teh combustion chamber are 'blowing by'. This builds pressure in the crank case and it needs to be vented somewhere or it'll cause heaps of problems. the gases go through the PCV and sometimes take a bit of oil with it
Bookmarks