Positive Crankcase Ventilation: Testing and Inspection

Crankcase Ventilation System Inspection/Diagnosis

Description

A crankcase ventilation system is used to consume crankcase vapors in the combustion process, instead of venting them into the atmosphere. Fresh filtered air from the intake duct is supplied to the crankcase, mixed with blow-by gasses, and the passed through a calibrated orifice into the intake manifold.