
A crankcase ventilation system is used to consume crankcasevapors created during the combustion process instead of ventingthem to the atmosphere.
Fresh air is supplied through a filter to the crankcase, thecrankcase mixes the fresh air with the blow-by gases and thenpassed through a positive crankcase ventilation-(PCV)orificed tube into the intake manifold.
The PCV orificed tube restricts the flow rate of the blow-bygases using an orifice-(1) located at the end of thetube. If abnormal operating conditions arise, the system isdesigned to allow excessive amounts of blow-by gases to back flowthrough the crankcase vent tube into the throttle body in order tobe consumed by normal combustion.
Engine
Adhesives, Fluids, Lubricants, and Sealers#09-03-16-002B: Dealership Service Consultant Procedure as Vehicle Comes into Service Drive for Tire Pressure Monitor (TPM) System Message, Light and...
Subject:Dealership Service Consultant Procedure as Vehicle Comes into Service Drive for TirePressure Monitor (TPM) System Message, Light and Customer InformationModels: 2006-2014 GM Passenger Cars and Light Duty TrucksAttention: The information found in this bulletin is to be used as a dealership ...