The PCV valve acts as both a check valve and flow-limiting device to keep things going only in one direction and with the right intensity to avoid over-scavenging the crankcase, which could ...

Never replace a PCV valve simply because it ‘looks dirty.’ All used PCV valves look dirty. Below, we’ll show two ways to check the condition of your PCV valve.

What's more, while some technicians have developed a work habit of inspecting the PCV system, others never check it unless they sense an urgent need to do so. Second, blow-by gases consist of oily ...

The PCV (Positive Crankcase Ventilation) system is designed to regulate and remove fumes from the engine crankcase, and to alleviate crankcase pressure which could cause oil leaks or seal damage ...