GMW17706

Description / Abstract: GMW17706, 1st Edition, December 2016 - Engine Ventilation System – Valve Durability Test

Purpose. This procedure describes the tests to determine the durability of ventilation valves (pressure regulator, check valve, bypass valve, etc.) in an engine ventilation system.

Applicability. The engine ventilation system valve durability test is typically used when an engine blowby system has a pressure regulator, check valve, bypass valve, etc., in the oil separator, Positive Crankcase Ventilation (PCV) tubes, PCV passages, and/or oil drain tubes.