I just installed a TOR exhaust on my 2001 daytona 955i and i've noticed this small rattling noise when its idling and during low RPMs. I remember reading about someone who thought this was a spark plug knocking, but someone corrected them in saying that it was the cam chain tensioner. So if that's the case, is this an easy fix? How much should i expect to pay at a dealer?
or is this something completely different?
or is this something completely different?