Just wondering what are some common systems of a PCV system that is needing change? I don't really have any symptoms yet but what are some common symptoms? Thanks

 

 

It's often the case that the PCV system isn't checked until the pressure its failure causes in the crankcase starts pushing oil past seals. A simple check involves removing the dipstick while the car's running: if smoke starts coming out, a clogged PCV system is a very likely cause.