[Vwdiesel] Alternator belt-What the ?

[LBaird119 at aol.com]

  Sounds most likely to be the misaligned dimple.  Just in case you have the 
harmonic balancer pulley (like on a Chevy or whatever), they can get soft 
or come apart so give it a good lookover.  If it's just a steel pulley then 
it's the dimple/nub.  (the dimple thing is so easy to get right that it 
didn't 
even occur to me!  Even I haven't done that one!)
    Loren