LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Crank Pulley

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Old Oct 5, 2006 | 04:14 PM
  #1  
z28 justin's Avatar
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From: Perrysburg, OH
Crank Pulley

Hey guys, I've been fussing over this thing for a while and am wondering how you remove the Crankshaft pulley. Everywhere I've read says to use a claw-type pulley puller, so I went out and rented one, but my pulley looks different than all the other pics I've seen too, so I took some pics.

This is the front


This is the rear


This is a bad picture of the middle



As you can see there are actually 2 pulleys on top of each other. I forgot the previous owner had put an underdrive pulley on there. The belt wraps the smaller silver one. I reached in the hole where the middle of the claw goes and felt a bolt in there. Should I remove this bolt or leave it and just use the claw to pull the pulleys off? Thanks guys, just don't want to break anything
Old Oct 5, 2006 | 04:19 PM
  #2  
Quickz1670's Avatar
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From: San Diego, Ca
Re: Crank Pulley

The bolt in the center is holding the ud in place. Remove it if you want to take it off. You should be able to take off the stock pulley. Heads up it can be a pita.
Old Oct 5, 2006 | 05:17 PM
  #3  
Injuneer's Avatar
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Re: Crank Pulley

The bolt in the center is holding the steel hub on the crankshaft. Do not remove it.

The U/D pulley is mounted by "sandwiching" it between the hub and the stock Damper/pulley, using longer versions of the 3 bolts that hold the stock pulley to the hub.

Have you tried simply removing the three bolts? The damper/pulley is not in interference fit. Its a loose fit on the hub, but sometimes requires a puller because of the large amount of rust that builds up between the hub and the damper. Your U/S pulley appears to be aluminum, so there shouldn't be a lot of rust holding everything together.

Your pulley may look different than others because the early years look like the one in your photo, the later years have a large triangular center that incoporates the "arrow"
Old Oct 5, 2006 | 05:21 PM
  #4  
shoebox's Avatar
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From: Little Rock, AR
Re: Crank Pulley

Actually, the one in my photo is the early one, too. 96-97s had the pulley with the smaller holes for using a puller on them (noted in the lower left of this diagram).
Old Oct 5, 2006 | 06:56 PM
  #5  
z28 justin's Avatar
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From: Perrysburg, OH
Re: Crank Pulley

I tried a puller from autozone but it was too small to reach the outside of the pulley. Could I use a rubber mallet on the back of pulleys to pry them loose a little?
Old Oct 5, 2006 | 07:10 PM
  #6  
Dave89IROC's Avatar
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From: Melvindale, MI, US
Re: Crank Pulley

Originally Posted by z28 justin
I tried a puller from autozone but it was too small to reach the outside of the pulley. Could I use a rubber mallet on the back of pulleys to pry them loose a little?
yes, hit on the front as well
Old Oct 5, 2006 | 10:18 PM
  #7  
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From: Little Rock, AR
Re: Crank Pulley

Originally Posted by z28 justin
I tried a puller from autozone but it was too small to reach the outside of the pulley. Could I use a rubber mallet on the back of pulleys to pry them loose a little?
You don't want to pull on the outside of the pulley, anyway. It can be easily ruined.
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