Last week a fellow member replaced his e46 325i double vanos seals with Beisan's. I tagged along to see how it was done and it wasn't an easy job taking out all the relevant items leading to removing the double vanos and vice versa. What surprised both of us was when the engine cover was opened, the cam shalf was totally out of alignment (about 7 degree out) and sure enough, the orginal vanos seals were harden resulting the IN and OUT vanos to be loose. The complete job took about 4 hours. According to our fellow member, his car now is very responsive and powerful. Hopefully he and the rest who had replaced their vanos seals will give us their feedback and comments. I will be replacing my vanos seals tomorrow morning.