The oil vapour emission control is achieved by means of a separator (1) (a function performed by the tappet cover) which collects the vapours released by the crankcase through the pipe (2).The temperature difference between the separator and the oil vapours causes partial condensation.The condensed vapours are sent to the crankcase via the pipe (3).The vapours that are not condensed are sent, via the pipe (4), to the turbocharger air intake hose.
