I have been reading this forum for awhile and noticed alot of threads about the famous VANOS seals problem. I decided to purchase the seals from Biesen Systems but before I replaced them I used my Autoenginuity software and recorded the VANOS Actual and Reference positons before and after the seals replacement. What I found was a dramatic change between the before and after data. I have included the files for everyone to see the difference in the data. By the way this was done on a 2001 330i with about 95000 miles and 2000 miles from when i replaced the seals. PS you may have to zoom in to see the numbers better!
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