34K, chain tensioner still noisy

[Andren Appelquest <andren@xxxxxxxxxx>]

The chain tensioning components of the oil pressure chain tensioning 
(2002 R1150RT) system are getting louder. It's not just at startup but 
lasts the entire ride (50-600 mi) and changes volume as a function of no 
correlatible variable that I can see. Is there an age or symptom which 
would signal that it's time to replace a component? Moreover, I wonder 
how much of the rattling and noise might be elsewhere in the overall 
valve lift system, e.g. push rods. I check the valve clearances 
frequently and keep them at 0.006" and 0.013" intake/exhaust. The local 
BMW wrenches say the engine racket is normal, but they also agree that 
my bike is more clattery than their other clients' bikes. On most 
occasions those wrenches are less than clever. Any ideas?
Andy in Seabrook