Voyager L4-153 2.5L SOHC Turbo (1989)
and a hose connected from the crankcase inlet air filter to the valve cover.
Crankcase vapors and piston blow-by are removed from the engine by manifold vacuum. These gases are drawn through the PCV hose and into the
intake plenum, they mix with the calibrated air/fuel mixture, and get burned and expelled with the exhaust gases. No fresh air enters the crankcase with
this system.