I'm in the process of installing this alternator now. Got the old one out and am prepping the new one. I need to switch the pulley out though, mine is only a single belt pulley. I got the pulley off the old alternator, but the nut on the new alternator pulley is larger then what I have available. Anyone know if it's a 1" socket or of it's metric?

Mine came with a double pulley so I didn't have to deal with the nut, which has to be metric IMO since it's a Bosch. Did you buy from the same seller I did?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

mine were all 22mm 1" would be a scosh bigger than 25

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

It was a 24mm nut.