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

crank hub removal

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Old Mar 13, 2007 | 03:36 PM
  #16  
Dave1980's Avatar
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I forgot the middle bolt back in the day! LOL I was about to mention that to you.
Old Mar 13, 2007 | 04:06 PM
  #17  
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I just tore mine down last week to replace the timing chain and it was a PITA! I followed Shoebox's site instructions for pulling the balancer. That part was easy, but the hub took some work.

To take off the hub I got one of the pullers that will allow you to run three bolts through it, which I threaded into the three holes on the hub. The puller I rented from Autozone didn't come with the right size bolts so I had to go to Lowes to get 3 longer bolts of the same thread and pitch. the bolts didn't fit through the ears on the puller at first, but with a little work I threaded them through there and into the hub.

As far as something to push against, I read somewhere that you can use a 1/4" drive extension, so that's what I did. It will fit in the hole where the hub bolt was without mucking up the threads. Once I finally got the puller in place I had to use an impact gun on the puller to get the hub off. I then used a 2 jaw puller to pull the crank gear off, again, using the impact gun.

I did end up pulling the radiator and AC condenser out in order to make enough room for the impact. Right now I'm waiting on parts to arrive and am hoping that I'll be able to get it all back together once the parts arrive. We'll see, I guess.

Good luck to you!
Old Mar 13, 2007 | 07:13 PM
  #18  
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Originally Posted by AtlantaGAJoe
I just tore mine down last week to replace the timing chain and it was a PITA! I followed Shoebox's site instructions for pulling the balancer. That part was easy, but the hub took some work.

To take off the hub I got one of the pullers that will allow you to run three bolts through it, which I threaded into the three holes on the hub. The puller I rented from Autozone didn't come with the right size bolts so I had to go to Lowes to get 3 longer bolts of the same thread and pitch. the bolts didn't fit through the ears on the puller at first, but with a little work I threaded them through there and into the hub.


Good luck to you!

Well that is how far I am right now. I just walked in the door from work and going to start on it in a minute.
I got a propane torch along with an impact gun, and an assortment of hardened bolts. I think I have all the tools now to finally get this *** off.
Sucks that is was a PITA for you as well, but glad someone else is going through this at the same time I am.
If I get it off tonight, I will def be back on here letting you guys know how it went.
Thanks for all the replies, taking them all into consideration
Old Mar 13, 2007 | 07:26 PM
  #19  
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Yet another way that correlates a few posts here for me is going to the hardware store, getting three long 3/8" bolts (I believe that's the size. They are to be smaller than what can be threaded into the hub and small enough to go through the puller) along with bolts/washers. Also get a grade 8 bolt that is also in the 3 1/2 to 4" range which is smaller than the crank bolt.
Put the grade 8 bolt in through the crank first, put a socket on the end of the grade 8 bolt which is the same size. Put your puller on with the longer, thinner bolts along with washers making sure they are all equal distance. Zero the puller bolt (hopefully it has a pointed tip) onto the top part of the socket so it sinks into the socket (where your socket wrench fits) and start turning. It's going to take a great amount of force at first, but once the hub snaps loose it'll be much easier to pull.
I just hate using impact wrenches for things like this because so much can go wrong in a very short time.
Old Mar 13, 2007 | 08:04 PM
  #20  
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SS RRR, the impact wrench is def a last resort type of thing.
Old Mar 13, 2007 | 08:58 PM
  #21  
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WOAH, it is finally off. I am not sure what let it come off exactly. But I let the PB blaster sit over night, then just now put the torch on it for about 20 seconds, and started turning the puller, and heard a loud pop. YES, then it came off with a slight resistance.
Thanks everyone, I wasnt sure what I was going to do about this POS.

So anything I need to know about it for putting it back on? I am hoping it goes alot smoother
Old Mar 13, 2007 | 09:46 PM
  #22  
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Originally Posted by AtlantaGAJoe
I just tore mine down last week to replace the timing chain and it was a PITA! I followed Shoebox's site instructions for pulling the balancer. That part was easy, but the hub took some work.

To take off the hub I got one of the pullers that will allow you to run three bolts through it, which I threaded into the three holes on the hub. The puller I rented from Autozone didn't come with the right size bolts so I had to go to Lowes to get 3 longer bolts of the same thread and pitch. the bolts didn't fit through the ears on the puller at first, but with a little work I threaded them through there and into the hub.

As far as something to push against, I read somewhere that you can use a 1/4" drive extension, so that's what I did. It will fit in the hole where the hub bolt was without mucking up the threads. Once I finally got the puller in place I had to use an impact gun on the puller to get the hub off. I then used a 2 jaw puller to pull the crank gear off, again, using the impact gun.

I did end up pulling the radiator and AC condenser out in order to make enough room for the impact. Right now I'm waiting on parts to arrive and am hoping that I'll be able to get it all back together once the parts arrive. We'll see, I guess.

Good luck to you!
Read a recent post about a guy getting a 1/4" extension wedged in the hub bolt hole. Not much you can do when that happens, but improvise. It would advise against using the extension.
Old Mar 13, 2007 | 09:49 PM
  #23  
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Originally Posted by camzaro28
WOAH, it is finally off. I am not sure what let it come off exactly. But I let the PB blaster sit over night, then just now put the torch on it for about 20 seconds, and started turning the puller, and heard a loud pop. YES, then it came off with a slight resistance.
Thanks everyone, I wasnt sure what I was going to do about this POS.

So anything I need to know about it for putting it back on? I am hoping it goes alot smoother
For installation, use a high grade threaded rod with same nuts and washers (a big thrust washer would work best). Thread the rod all the way into the crank snout and use the nut and washer to pull the hub back on. If you taper the end of the threaded rod that screws in, there is virtually no chance of it getting stuck in the crank.
Old Mar 13, 2007 | 11:33 PM
  #24  
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oops already solved....

Last edited by ArcticWhiteZ28; Mar 13, 2007 at 11:36 PM.
Old Mar 13, 2007 | 11:39 PM
  #25  
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From: Jackstandican
Originally Posted by camzaro28
So anything I need to know about it for putting it back on? I am hoping it goes alot smoother
http://web.camaross.com/forums/showthread.php?t=494340
Old Mar 14, 2007 | 12:39 PM
  #26  
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From: Fargo,ND
Originally Posted by shoebox
For installation, use a high grade threaded rod with same nuts and washers (a big thrust washer would work best). Thread the rod all the way into the crank snout and use the nut and washer to pull the hub back on. If you taper the end of the threaded rod that screws in, there is virtually no chance of it getting stuck in the crank.

Thats what I have used. It also helps to use a little emory paper on the hub.
Old May 31, 2007 | 04:51 PM
  #27  
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im doin mine now, glad i found this post. hope i have betetr luck, lol.
Old May 31, 2007 | 07:10 PM
  #28  
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From: Roanoke VA
Originally Posted by shoebox
For installation, use a high grade threaded rod with same nuts and washers (a big thrust washer would work best). Thread the rod all the way into the crank snout and use the nut and washer to pull the hub back on. If you taper the end of the threaded rod that screws in, there is virtually no chance of it getting stuck in the crank.
7/16" - 20 x 4", threaded into the crank snout to push againsed to get the hub off the crank and what was said above to get it back on. That's what I did.
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