Alternator Belt Adjustment on Audi 100 1990

[Huw Powell]

Ten-fifteen bucks at an audi dealer for a new toothed nut/bolt and 
toothed mounting arm (ok, ten years ago?).

These alternators are notorious for being difficult to "crowbar" to 
tension the belt.

On 1/30/2013 11:04 PM, mboucher70 hotmail.com wrote:
> Fan belt for the alternator is supposedly tightened by an inner toothed nut which engages with teeth in the adjustment arm.  Tightening should be a matter of slackening the central bolt then adjusting the bolt to get the right tension, and finally, tightening back the bolt.
>
> As best I can tell the teeth on the nut are stripped.  Hard to get a good look but they seem worn, and aren’t tightening anything when turned.  Any ideas where I might get a replacement?
>
> More immediately, I’m counting on the brute force method of finding a long enough crowbar-like tool to just pry the alternator and then lock the bolts into position.  It will move...up...if I press in the middle of the belt it will move the alternator towards the slacken position, further up the adjustment arm.    But so far I haven’t been able to pry it enough in the opposite direction to get it to move further down the adjustment arm.
>
> Thanks for any suggestions,
>
> MC
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