[Vwdiesel] Alternator belt-What the ?

[Shawn Wright]

On 19 Feb 2005 at 14:37, Libbybapa at wmconnect.com <Libbybapa at wmconnect.com> wrote:

> There should be four allen head bolts holding the pulley onto the crank 
> timing gear.  The pulley just slips over the center crank bolt, so messing with the 
> center crank bolt will do nothing to adress the pulley.  There is a nub on 
> the timing gear, between two of the allen thread holes.  That nub fits into a 
> hole or notch in the pulley to assure that it only goes on one way.  If the 
> pulley is installed rotated, so the nub doesn't go in the cutout, you guessed it, 
> it will seem tight, but wobble really nicely.  Kinda makes me wonder why the 
> nub business in the first place, but it may keep the rotational stress off the 
> bolts.  I imagine you need to take off the allen bolts and install the pulley 
> with the correct orientation.  On the alternator there are three bolts to 
> loosen.  The one in the slide area for obvious adjustment, the one through the 
> pivot of the alt, and the one for the pivot of the bracket arm.  Tighten them 
> snug enough to still let the alt move.  Then while yanking up on the alternator, 
> tighten the one in the slider slot.  Relax, and tighten the other two.  Do 
> that after adressing the crank pulley. :-)

Andrew's probably right - that nub was my first thought too. But while you're 
there, check the torque on the big bolt also. Check it by tightening, not 
loosening! Chances are you won't be able to budge it, but double check 
anyway, someone may have used it to rotate the engine while timing, and 
loosened it. This bolt coming loose means big $$ if the tbelt jumps off...

Shawn Wright
http://zuiko.sls.bc.ca/~swright
'85 Jetta TD (retired)
'85 Jetta D 
'88 Westy 2.1L
'82 Diesel Westy