The Purpose of a PCV Valve
Friday, September 6, 2013 | Labels: a, of, pcv, purpose, the, valve | |
The positive crankcase ventilation valve, PCV for short, is an "L"-shaped mechanical component found in vehicles that assists in returning gasses from the engines crankcase, where gasoline is used.
Significance
The PCV valve is just one part of the PCV system, which uses both optimal gasoline performance and is better for the environment. Instead of allowing fumes from the gasoline to ventilate into the atmosphere, the PCV valve sends the gasses back into the combustion chamber to be used again as additional fuel.
Location
The location of the PCV valve within a vehicle brand and model varies with each company. For the 1997 Nissan Altima, the PCV valve is under the hood of the vehicle, in the upper engine area, found mounted in the intake manifold. Most vehicles follow the same PCV placement by the engine, but exact specifications can alternate.
Appearance
The PCV valve is most commonly part plastic and part metal. The valve has two parts: a vacuum on one end that suctions gasses back to the intake manifold, and a metal sphere inside the valve corner, aiding in efficient transfer of gasses.
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