I did this last year, and it was a piece of cake. I had only owned the car for about a month and had never done any work on it, but it still only took 6 or so hours. I'm sure if you already know your way around the engine it could take much less. The scariest part of the whole thing was taking out the reverse-threaded vanos bolts. I ran "righty-tighty lefty-loosie, now the opposite" through my head about a million times before I put pressure on them, but they came right out. If you follow the instructions you won't have to touch the timing at all.
Last edited by ryansteel87; 07-08-2012 at 10:15 AM.