Crankcase ventilation directly to atmosphere?

[Kingtal0n]

Originally Posted by hobbs

Uh huh...

Not only did all of nissans highport DET motors come with an inline air/oil separator, lowport DET motors have them build into the valve cover and USDM DE motors have the same air/oil separator. Regardless if they are plumbed back into the pan or left to collect and be drained by the user they still serve the same purpose and they are all catch cans.

Catch cans are always a good idea on motors that experience higher than OEM boost levels and capping a valve cover vent is never a good idea. A well thought out PCV/catch can setup will go a long way.

The oil doesnt sit in a can, waiting for the operator to empty it out every so often, the way aftermarket cans are intended to be used. Big difference between hands free operation and aftermarket toilet bowls. You are simply calling the oil pan a "catch can" what difference does it make if the oil breifly passes through a hose or object? Thats like saying my valvecover is a catch can, because the oil briefly passes through it.

hey guys my turbocharger oil feed is a catch can because the oil breifly passes through it.