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Author Topic:   Shimming Crank Pulley
Rook78
Dirt Maniac

Total posts: 106
posted March 17, 2005 10:22 AM  
I purchased one to one pulleys and the new pulleys do not line up. I was told "a lot of guys use washers as shims". Is this safe?
One problem I noticed in doing this is the center aluminum piece that keeps the dampner and pulley allinged is ineffective using washers. There is a gap now that allows it to kind of just slop around in the hole.

Suggestions please and as usual THANKS!
ROOK



NJantz
Dirt Forum Champ
Total posts: 755
posted March 17, 2005 11:44 AM  
I've shimmed my crank pulley off the face of the balancer with washers. So far no problems. I didn't experience any "slop" with mine tho.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted March 17, 2005 12:16 PM  
I've had to press the flange on the water pump back further to fix alignment problems before. I would be leary of introducing runout into the crank pulley by using washers.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 17, 2005 12:23 PM  
I agree with wfoondirt. You need to have the crank pulley centered in the dampner so I would adjsut the water pump pulley if you can. Otherwise there are shim kits available that should solve the problem and still allow you to use the centering piece. Check Moroso's website or maybe speedway might have them.

Rook78
Dirt Maniac

Total posts: 106
posted March 17, 2005 12:45 PM  
Thanks guys. I have looked at the shim kits in Speedway, they are triangular and I would have the same problem. Here is what I came up with let me know what you think.

I took some sheet metal, same thickness as washers. Used a hole saw and cut it to the same diameter as the backside of the pulley. I then used a hole saw to cut a hole in the center same diameter as the allignment piece that the bolt goes thru. Then drilled the three bolt holes for the pulley bolts. Seems to fit perfect and holds everything nice and tight.

But...b4 I put this all together I want to make sure that will work o.k. whataya think??

ROOK

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted March 17, 2005 12:55 PM  
sounds like it should work. Thats pretty much like the shims I have. They are round instead of the triangles. As long as the centering piece registers both the shim and the pully to center them then they should work fine.

Rook78
Dirt Maniac

Total posts: 106
posted March 17, 2005 03:02 PM  
Appreciate the help as always.

Thanks!

2nd2none
Dirt Forum Champ
Total posts: 755
posted March 17, 2005 06:26 PM  
southwest speed sells crank pully shims that work a he!! of a lot better than washers do!

NJantz
Dirt Forum Champ
Total posts: 755
posted March 18, 2005 05:55 AM  
I do have a piece (pump mandrel) that the pulley centers up with the crank on. lol forgot that part. you definitely need something.

Dman
Dirt Freak

Total posts: 270
posted March 18, 2005 07:08 AM  
I use Southwest Speed's pulley shims.Never a problem. Centering is handled fine by the three bolts.

dirtywrench13
Dirt Freak

Total posts: 324
posted March 19, 2005 06:48 AM  
i'd get the water pump thats shorter, then shim the upper pulley out to match.

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