PCV Breather Filter - help

[azca]

What's a PVC Breather Filter and do I need to replace it?

PCV Breather Filter: The PCV breather filter assures only clean, filtered air is drawn in through the PCV breather. A clogged breather filter prevents the PCV from siphoning away the blowby gases and moisture created by engine combustion, resulting in oil breakdown and sludge buildup. The PCV breather filter should be replaced every 30,000 miles; however, yearly replacements are a good preventive measure.

[Couverman98682]

Where is it on the M42 motor? Anybody?

[Sergey]

I don't think such a thing exists on M42 motor.

Regards,
Sergey.

[ClubSport]

Sergey's right, there isn't one on an M42. And the PCV is called a PRV by BMW. Looks kind of like a hockey puck, with a hose going in the bottom and one in the side. Recirculates crankcase gases into the intake to be burned.