Just after some opinions on this setup... My cam cover were coated with oil residue and dirty on removing my plenum. It looks to be coming from all 4 Crankcase vents, so i want to eliminate it for good along with intake and plenum oil. Deleted PCVs, 4 ports off the Intake cam covers tee'd to a catch can, then recirc'ed to the original intake pipe location. Theory is it will aid in dealing with blow by, keep the oil out of the intake and plenum, and ricirc'ing it get rid of the oil smell. Cheers Craig
^ excellent point. With what you want to do you'll have to vent the fumes to atmo otherwise you'll end up pressurizing the covers. That or put check valves in.
Going to the stock pickup points on the pre turbo side will mean you don't need the PCVs. The front camcover pickup is the stock vent from the intake cams to the turbo intake - the top pickup is drilled and tapped to avoid the smoke under heavy cornering that the stock setup is prone to.
Or you can put a breather on the catch can and avoid using the boost nipples for vacum . Like old V8 engines used to just have a breather with small filter connected to the rocker cover.
PCV's I have the rocker cover breathers (Just behind cam belt cover both sides)going to a catch can in the front bar, Then just put a cap/block off on the pre turbo tubes (ziptied for security) My pcv's are still connected . I check this after every run (Drags) any HG / Piston / Ring issue will show here first. Water / oil / both ... If your engines oil leaks/smells over the rocker covers are caused by blowby? removing the factory breathers and disconecting the PCV's will make this worse . You maybe lucky and just have leaking rocker covers .
It's what i was meaning. Using a small filter and having it vent to atmo. Not reentering the engine. Or as suggested return line back into the pre turbo pipe work.