This is an '81 Scirocco. There are 3 bolts that attach the pulley free-spinner (or whatever it's called) to the compressor body. I haven't had a belt on the AC for decades, but somehow those 3 bolts have vibrated loose and all three are gone, leaving the pulley thingy vibrating loudly and threatening to cut a wire. Does anyone know what size these bolts are? They were clearly very short - no more than 12mm long. The diameter is in between an M6 and M8. They have what looks like a 1.25 thread pitch like an M8. I can screw in a coarse thread 1/2" american standard bolt, but it's a bit loose and I'd be afraid to tighten it much.
thx, nf