As part of my Driveline Overhaul Project I rebuilt my M52 engine. While I was at it I decided to rebuild my all-original VANOS using the Beisan Systems Seal Kit and Anti-Rattle Kit.
This video shows almost the entire process and should help you tackle the VANOS rebuild. HOWEVER, this video is NOT a substitute for the full instructions provided by Beisan.
The two Beisan kits were $60, which is an order of magnitude lower cost than a brand new VANOS from BMW. In short, these kits are a great deal.
For more information about my driveline overhaul process check my blog:
www.dvatp.com/bmw/e36