[A4] clutch noise

[Peter Kirby]

There seems to be a ticking or rattling sound that is related to
engine RPM coming from my A4's clutch when the car is hot (it is
completely quiet when the car is cold).  At first I thought it was a
heat shield on the exhaust but it is clearly engine speed related:
noticeable at idle and increasing loudness and frequency with
increasing engine RPM.

If I press the clutch in, the noise is louder.

Other than the noise the clutch feels 100% normal: no slipping, no
chatter, smooth engagement.

Any thoughts on what this noise could be?  I saw on the SJM site that
earlier Audis (200TQ) had a service bulletin out for rattling of the
clutch disk.

Thanks in advance.

Peter
2001 1.8T A4 (123000 km, original clutch)

-- 
ps my peterk at nrs.mcgill.ca account will be dead soon.  Please make
sure to use my 4pkirby at gmail.com address in the future.