Toadster

The old pulley is a bit wobbly after about 25k miles... Getting a new one from Shardul

should I add a shim or two? or will the new pulley spin true?

Rocman8

My 77mm doesn't spin true so the gap is different all around it. Mine has no shims. Others have reported the same as well.

Elhonaz

What kind of clearences are you getting with no shims?

Rocman8

Anywhere from .400 to .700

Elhonaz

whats that in mm ? near the factory spec? .35mm to .45mm?

E55amg/FD3S

Stock pulley > Aftermarket pulley. Based on my experience.

Ruthle55

You sure about that?

I think you mean .040-.070 unless you have almost a 1/2 inch gap

Toadster

link to a video showing the looseness of the pulley - you can hear it rattle against the rivents just spinning - not solid anymore

http://bit.ly/29jYzXK

Rocman8

Yes, in mm. The low end is in spec but on the upper end its way out but what can you do.

Rocman8

No, I meant what I said except in mm. Sorry I didn't specify.

Toadster

for longevity? probably

GatorMB

From photo 2 in the first post, I would not be too concerned with shimming.

The inner area of the clutch has been rubbing on the pulley in a bad way, The outer area of the clutch is not seating properly causing scoring.

The center of the clutch where the return spring rivets are shown. These are worn half way through.

Replace the clutch and pulley before they destroy the nosecone of the supercharger.
Clearence the new assembly properly as others are recommending in this post.

All Cheers, Gator