Every engine has some sort of crankcase breathing system. The internal combustion process creates pressure, some of which makes its way past the piston rings-along with fuel vapors-and into the ...

A properly functioning PCV system will expel the gases from the crankcase faster than the engine produces them. ... Tuning Issues, and Proper Crankcase Ventilation. HOT ROD Staff Writer May 25, 2018.

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.

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace ...

Spiracle CFS systems reduce blow-by emissions generated from an open crankcase vent and prevent fouling of turbochargers or intercoolers in CCV systems. Also reduce in-cab fumes and draft tube ...

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.