The job of the Positive Crankcase Ventilation (PCV) system is to remove blow-by gases from the crankcase by vacuum and recirculate them via the intake manifold to be burned in the engine.

Crankcase ventilation is almost provided in all automotive engines. ... During high speed, intake manifold vacuum is low and so spring loaded valve is forced away from its seat which allows ...

Venting your V-8 engine is an important way to cure crankshaft pressure, and we take you step by step through the process.

A significant part of these on-road emissions used to come from the crankcase — up to 30%, according to a 1962 study — but thanks to changes in engine design, that's no longer true.

Vahid Golkarfard, Ramanathan Subramaniam, Jonathan Broughton, Andrew King, Benjamin Mullins, Comparative Performance of 12 Crankcase Oil Mist Separators, SAE International Journal of Engines, Vol. 12, ...

The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...