I had similar symptoms with noise while clutch is depressed and engine at
high revs.  The pilot bearing went.  I put in a Luk clutch kit and new
seals, which included a felt seal for the pilot bearing.

I experienced a pilot bearing failure in my previous Westy as well.

Chris S.

On Sat, Apr 12, 2008 at 10:16 PM, Matthew Snook <matt@snooksband.com> wrote:

> Occasionally, as I release the clutch pedal there is a brief sound and,
> strangely enough, a matching vibration felt in the pedal itself.  It's
> about
> the same frequency as a vacuum cleaner in pitch.  It reminds me of the
> noise
> made by an electric fan when the propeller is loose on the shaft - a
> harmonic vibration which is short lived and unpredictable.
>
> I have tried to be careful when shifting, but I don't seem to be able to
> decipher what conditions or actions of my own are responsible.  Does any
> of
> this sound familiar at all?  Is it time to rebuild the clutch, or is there
> an adjustment necessary?
>
> Thanks,
>
> Matthew Snook
> '84 1.9 Westy
>