Internal crankcase ventilation system with easily accessible PCV valve

摘要

An engine crankcase ventilation system has internal crankcase vapor recirculation passages including a cavity in a valve cover arranged for push-in mounting of a PCV valve in the vapor flow path and a screw cap closing the cavity through which the PCV valve is installed or removed. The screw cap preferably includes finger-like abutments to maintain the PCV valve in position against the differential pressure of crankcase vapors across the valve.