That double alt pulley might also be the same as on a Mercedes Turbodiesel 81-85. I have essentially the same Bosch alt on mine and I have swapped pulleys around on some of them.
fatmobile, did you do the grinding of the AC bracket installed in the engine or removed? I really like what you did going to 1/2 belt with the double pulley. Did that eliminate belt stretch, squealing, and frequent belt tension adjustment? What length belt is needed and does the belt flop or is it steady?
...BTW your Bieber avatar is awesome.-Malone
Looks like you need to remove 3/8th inch of material off the alternator mounting material (toward center of engine) provided you have the same shaft/pulley length.....according to my measurements here at home. I like this as I have several of these nice Motorolas which need a job AND you can easily switch back to the original at any time with no permanently cobbled-up components.
yeah, sometimes I am a turd blossom. It was easy enough for me so it must be ok for everyone else too.
The 3/8" removed was because of the pulley alignment not for adjustment. The way I put the turnbuckle on I think it is just as stout as the stock arm. Lasted 40,000 miles *with my old GTI belt that had at least 45 thousand on the belt* and I never adjusted it one time...I think it did ok.
Clarification: the 3/8 inch material comes out of the front hemisphere aluminum of the alternator.