Thanks Turbo Bimmer...I will look into that since i feel the chain when i rev so im a little concerned but also a factor is that on this board and so far i have not seen any one replace these rails on the I6 mainly on the V8s but i will look into replacing the hydraulic tensioner. on a side note the rattle has been located but not the exact cause. the link is to another thread were i was askin for possible rattle but i have definitly found its location just not whats causing it exactly.

http://www.xoutpost.com/bmw-sav-foru...ing-sound.html