johnymd
Club Member
I've been looking at what to do with regard to these 2 breathers. If the L-series is of a similar design to other engines then I would assume the rocker cover breather is an inlet and the one on the side of the block is the outlet. Modern engines use this air flow method to assist in returning oil from the head back to the sump which sounds like the right thing to do. So is the answer just to put a small filter on the rocker cover and feed the lower vent to the intake system? at the intake balance tube? I've pulled the carbs and all the hoses off my latest 240z and want to simplify what I put back on but do it right/better. I remember some time ago there was a thread about the benefits of forced crankcase evacuation and this is what I'm trying to do.