[Vwdiesel] Clutch Thumping

[Will Taygan]

My first thought was CV joint, or something hitting the shaft. Thwap
thwap thwap.  

Clutch seems to work fine, no shudder, no slip.  I can feel the sound in
the car easily. Not a grind or a whine.

Sound seems to be coming from the middle under the engine.

Goes away when the clutch is depressed.

Seems like inner CV joints wouldn't be affected but clutch being
depresses.

Thump gets quieter and is silent at higher speeds, but is significant at
lower speeds.

At idle the shuffley?? sound is gone though (sounded like something was
loose rather than a grind or whine).  I'm not sure how the clutch goes
together, but I'm wondering if there is something in there, or a bad
bearing or spring?  I was wondering if a spring could be hitting
something, and then get pushed out of the way at higher speeds? - I've
never had it apart so I'm not sure what to imagine.

Thanks,

Will.


On Fri, 2009-02-06 at 11:09 -0500, LBaird119 at aol.com wrote:
> Any way to describe it better?  Something dragging and something 
> thumping are way different sounds.  My first thoughts, from a 
> thumping, would be a bad motor or tranny mount, but the shifter 
> should bounce with the sound if that's the case.  Something thumping 
> in the clutch could inded either make something you could feel in the 
> shifter or the pedal, if you hold your foot lightly on it when it does it.
>   Dry CV joints or a bad one CAN thump, seems more likely to be an 
> inner doing that.  Bad lower ball joint...  
>   A dragging sound would be a lot different though.  Cover plate 
> over the flywheel, something in a brake disk, something dropped in 
> the timing inspection hole, spring fall apart out of the clutch disk...
>   Try to isolate where and what it is, a little better if you can.  :-)
>     Loren
>