Crankcase ventilation valve

[Ivan_ZG]

What exactly is that for, symptoms of malfunction and can it be removed and bypassed somehow? Does it affect anything?

[UrS4boy]

AAN/ABY/ADU Positive Crankcase Ventilation (PCV) System with revised diagram, PNs and

What exactly is that for, symptoms of malfunction and can it be removed and bypassed somehow? Does it affect anything?

They all affect something. Some more than others. And, in my environmental engineering opinion, should NOT be removed or bypassed.

Which one do you think it is:

AAN/ABY/ADU Positive Crankcase Ventilation (PCV) System with revised diagram, PNs and Links:
http://forums.quattroworld.com/s4s6/msgs/22506.phtml

[ColonialNomad]

What exactly is that for, symptoms of malfunction and can it be removed and bypassed somehow? Does it affect anything?

It's a useful thing.

http://www.s2forum.com/forum/showthr...=mystery+smoke

http://auto.howstuffworks.com/positi...ion-system.htm