In regards to the sound, my first thought would be throw out bearing.

Have a listen while in neutral. Depress the pedal, then let it up. If
you hear the sound while pedal down, and/or while on it's way up, this
*may* mean TOB.

The other alternative could be something related to the input shaft. I
would imagine that if that were the case, the sound would be happening
with clutch pedal up. I recall this happening on an old Volvo of mine.
Warming it up in the morning, it made a horrid racket until I pushed
the clutch pedal down which disengaged the clutch thus stopping the
input shaft stopped turning. Turned out to be the input shaft
bearing(s).

Neil.

Neil.

On 4/12/08, 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
>

--
Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"

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