Also known as PCV, and commonly associated with a PCV Valve. What is it? A method the engine on your car uses to ensure there is no excessive pressure build-up in your crank case (By allowing it to vent when needed); And also (More important for pollution control) - Redirects that vented gas back into the air-intake system to be burned off as combustion during normal engine operation. The PCV Valve is just a little (usually plastic) one-way vent tube. It allows the engine to release pressure, but does not allow the engine to "Pull" or "Inhale" for lack of a better word, through the same valve. If the engine could not vent excess gas, it would cause all kinds of problems, from stalling to moisture-contaminted oil. If one were to remove the PCV valve, the excess gas would be released into the open air, more causing pollution. The engine it self will continue to run without the PCV valve installed, but there are some down-stream issues with this; Namely the ability for moisture and other pollutants & particulates to re-enter the engine's crank case and mess things up.
open crankcase ventilation and closed crankcase ventilation.
In pre-PCV (Positive Crankcase Ventilation) vehicles, that was a term for the crankcase ventilation pipe.
positive crankcase ventilation
To find the positive crankcase ventilation valve, look on the right bank of the engine. The valve is located beneath the intake manifold.
Be sure the PCV (Positive Crankcase Ventilation) system is in good working order.
PCV is positive crankcase ventilation
The positive crankcase ventilation valve on a 2002 Mercury Cougar is located on top of the engine; in the valve cover. It removes harmful fumes from the engine.
Do you mean PCV ? - ( Positive Crankcase Ventilation ) valve
Positive Crankcase Ventilation Answer 2: The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by scavenging crankcase vapors. It does this by circulating fresh air from the air cleaner through the crankcase, where it mixes with blow-by gases and is then rerouted through a PCV valve to the intake manifold. - Haynes Repair Manual #36071
No, the crankcase ventilation systems employed on diesels are not PCV (Positive Crankcase Ventilation) systems. They are CCV (Closed Crankcase Ventilation) systems. Diesels do not produce sufficient vacuum for a PCV system. They use only a crankcase breather which is vented to the filtered side of the intake ducting. The engine can "breathe" both in and out via the breather cap. The round black thing on the TDI valve cover is a breather cap.
The Motorcraft EV-152 is a PCV valve ( Positive Crankcase Ventilation ) valve
Its called a PCV Positive crankcase ventilation. Its the little gadget that plugs into the top of the valve cover. Pull it out and it will rattle. That means its good.