liamgtturbo
Member +
what is a pcv valve and what exactly does it do. i think i need one becuase the car seems to put out alout of white smoke now and again, in traffic and idling. thanks
As an engine runs, gases from the cylinders leak past the piston's sealing rings into the crankcase (containing the crankshaft and other parts). This leaked gas is sometimes referred to as "blow by" because the pressure within the cylinders "blows" them "by" the piston rings. These gases include compounds harmful to an engine, particularly hydrocarbons (unburned fuel), as well as carbon dioxide and water vapor. If allowed to remain in the crankcase, or become too concentrated, the harmful compounds will condense out of the air within the crankcase and form corrosive acids and sludge on the engine's interior surfaces. This can harm the engine as it tends to clog small inner passages, causing overheating, poor lubrication, and high emissions levels. To keep the crankcase air as clean as possible, some sort of ventilation system must be present.
http://en.wikipedia.org/wiki/PCV_valve
Its located between the Inlet manifold and the rocker cover, only costs about £20 to replace too.Stopped my old car smoking like a bastard when idle, as i suspected it was turbo seals...
Part numbers:
90480-18006 = PCV valve Grommet
12204-10040 = PCV valve
Worth a shot surely?
Dave