Positive Crankcase Ventilation: Testing and Inspection

Crankcase Ventilation System Inspection/Description





A crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. The air cleaner supplies fresh air (1) through a filter to the crankcase.





The crankcase mixes the fresh air with blow-by gases. This mixture then passes through an orifice in the cylinder head gasket and to a pipe located in the intake manifold.

The crankcase ventilation system has no serviceable components so no maintenance of the system is required.