Where is the PCV valve on a Silverado?
Harmful vapor is drawn out of the crankcase to the intake manifold and fresh air is drawn into the crankcase. The flow or circulation within the system is controlled by the PCV Valve.
Is there a PCV valve in a Toyota 5.3?
Parts guy said the 5.3 had two sections of tubing, but no PCV valve. I bought one piece of tubing and he ordered the other. He had printed out the schematic showing the tubing and he gave it to me. I just now looked at the tubing I purchased (driver’s side) and it is just a hollow tube.
What is the function of a PCV valve?
The closed system is very effective as an air pollution control device. The most critical instrument in the PCV system is the flow control valve, commonly and heretofore referred to as the PCV Valve. The purpose of the valve is to meter the flow of the vapor from the crankcase to the intake manifold.
How does the PCV system work in a crankcase?
The PCV system accomplishes this by using manifold vacuum to draw vapor from the crankcase into the intake manifold. Vapor is then carried with the fuel/air mixture into the combustion chambers where it is finally burned. Thus, PCV is effective as both a crankcase ventilation system and as a pollution control device.
Harmful vapor is drawn out of the crankcase to the intake manifold and fresh air is drawn into the crankcase. The flow or circulation within the system is controlled by the PCV Valve.
When to replace the PCV valve on a GM Truck?
Remove the PCV valve and inspect the hose going to the intake manifold for signs of excessive oil being present. If excessive oil is present in the PCV hose, replace the PCV valve (Type 948C) (2) with a new-style fixed orifice PCV valve, GM P/N 12572717 (1).
Are there moving parts in a PCV valve?
Important: The new style fixed orifice PCV valve contains no moving parts, and does not rattle when shaken. If the vehicle has an orifice style PCV valve, investigate other causes for high oil consumption. Parts are currently available from GMSPO.
Where do I Find my PCV valve number?
Inspect the vehicle for installation of a fixed orifice PCV valve, refer to Corporate Bulletin Number 01-06-01-029B for PCV valve identification. Vehicles undergoing this throttle body procedure MUST use a Fixed Orifice PCV Valve, P/N 12572717. Clean throttle body bore and throttle valve plate of carbon using a shop rag and an appropriate cleaner.