See Figures 1 and 2
The Crankcase Ventilation (CCV) System performs the same function as the conventional PCV system, but without the use of a vacuum controlled valve. When in operation, fresh air enters the engine through an inlet and is mixed with crankcase vapors. Manifold vacuum draws the vapor/air mixture through a fixed size orifice and into the intake manifold. The vapors are then burned off during combustion.
There is no servicing to the CCV system unless one of the components gets clogged or fails.