Quote Originally Posted by Jon K
All of the guides on my 92 were plastic
According to the ETK the main chain guide (the ETK calls it tensioner) is aluminum I think (part number 11311726503)
http://www.realoem.com/bmw/showparts...85&hg=11&fg=25

After 9/94, the main chain guide is a different part number (11311703717). With it a different tensioner (#15).
http://www.realoem.com/bmw/showparts...85&hg=11&fg=25

But I can't argue with what you see. I am interested in what tensioner you have (the cylinder bolted to the outside to adjust chain teneion). Does it have a bolt outside so you can adjust chain tension? For 9/94 and later, the chain tension is no longer adjustable.