Oil Catch Can

[tooljunkie]

i saw some plans a while back,it helps keep motor oil cleaner too,it involved a little coarse steel wool to filter the oil out of the vapour,and utilized the vacum back to the engine

[culvercityclassic]

I run the vent open and do not push anything back into the motor. The can catches any excess oil that I may have added due the angle of the motor. Another factor is the pressure that builds up when spinning 8000rpm. One of my engines is vented at the valve cover and the case.