Now here is a trick if you need to use a spacer inside the fan pulley. Put a dab of silicone between the spacer (or spacers if you need more than one) and let it set up before tring to insall because it can be difficult to line up all the holes in the spacers, pulley, fan etc. Just don't use too much as you don't want to creat a "wobble" in the pulley etc.
I used super glue. Too many pieces to handle with only 2 hands. Set up everything on a spare water pump on the bench. Bolted up firmly for about 15 minutes to let the super glue set. Unbolted, then installed. Worked perfectly.
I'm a hobbyist. Not a professional. Don't be hatin'!
