We call these gasses ‘blow-by’ and eventually pressure will build up, which is called ‘crankcase pressure’. If you have been wondering what a PCV valve is, how it works, how to replace it ...

The CCV filter allows these excess gases to vent and in turn reduces the pressure buildup, while ensuring contaminants don't gum up the crankcase. Without a means to siphon off pressure within the ...

Separating the crankcase from the intake manifold, which is a source of varying air pressure, the PCV valve maintains the optimal level of vacuum in the crankcase to extract the products of blow ...