We don't mean to be the harbingers of doom, but it's unwise to keep driving if your car's engine has a malfunctioning positive crankcase ventilation (PCV) system, particularly a bad PCV valve.

hey guys welcome to PB garage today I'm going to show you how to identify a bad PCV valve on your mark 5 GTI or G that's the 2.0T FSI motor the early motor and then I'm going to show you how to ...

Positive Crankcase Ventilation—three dirty words, but do they really need to be perceived that way? In general, the PCV system has two main functions: vapor relief and liquid separation. PCV systems ...