RE: your vanos issue is with the $h|t seal BMW uses in there. check the FAQ for the techincal thread on Roadfly about it.
Been there, time to bring that thread back to life? LOL
1999 BMW 528i sports pkg. 5-speed, rear lip spoiler, removed phone, Aspheric mirror, new M5 dead pedal, home made clutch stop, removed intake muffler, clear side and rear lights, Nein CDV, full cooling system overall, Beisan VANOS seals.
Best mod to date: removed seat clip.