Originally Posted by mr ilia
Valve cover vent plugs to the bottom of throttle body.
I know but the oil vapor makes a mess of the intake valves and manifold, I doubt it's good for combustion either. I might build something like this http://www.valvoline.com/car-care/au.../pht20040301cc
E30 Stuff For Sale: Clutch Fan and Shroud, 4 Pack Ignition Coils, ATE 750il MC (New), Offset Trailing Arm Bushings, m42 Valve Cover (Clean), M10 Engine Mounts (New), M42 Injectors,