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

Pulling crank hub off.

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Old 01-10-2004, 02:54 PM
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Pulling crank hub off.

I got a puller yesterday to pull the balancer hub off, but it's not budging at all. I even broke a few threads on one bolt, nut flew off.

So I went to bigger bolts and nothing is happening. Yes the bolt is out of the hub. I would of put more force on it this time, but it felt like another bolt was gonna snap. And this is a borrowed kit from AutoZone. :blah:
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Old 01-10-2004, 02:56 PM
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You removed the big one from the center right?
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Old 01-10-2004, 02:57 PM
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Gently heat it (be careful) and apply pulling pressure with the puller. Then tap it with a heavy hammer lightly, from all sides. That should work.

Greg
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Old 01-10-2004, 03:02 PM
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You have to thread in a bolt like the hub bolt you pulled out but about twice the length and push against that. if you dont push against a bolt then you will never get that hub off.
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Old 01-10-2004, 03:07 PM
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Originally posted by turbo_Z
You have to thread in a bolt like the hub bolt you pulled out but about twice the length and push against that. if you dont push against a bolt then you will never get that hub off.
Can I put the stock one back in just a little bit and start it like that?
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Old 01-10-2004, 04:19 PM
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Originally posted by ibanez6rg
Can I put the stock one back in just a little bit and start it like that?
i tried that, came off but now i have a fugged up bolt and crank threads
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Old 01-10-2004, 05:10 PM
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you can tap the threads and straighten them out, or at least I was able to, I still used a three clawed puller to get the hub off and you really just need to get a longer bolt that will bottom out that you can push on.
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Old 01-10-2004, 05:34 PM
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Originally posted by nov194
you can tap the threads and straighten them out, or at least I was able to, I still used a three clawed puller to get the hub off and you really just need to get a longer bolt that will bottom out that you can push on.
Yea, I'll just go grab a longer bolt tomorrow. I don't feel like screwing anything up. Is it 7/16-20?
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Old 01-10-2004, 05:59 PM
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you leave the harmonic balancer on it and put the stock bolt in like 2 to 3 threads then put the harmonic balancer puller on it and press it off using the bolt then tap around the balancer lightly when you cant go anymore, then it should be able to pull off
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Old 01-10-2004, 06:32 PM
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Originally posted by nitropatch
you leave the harmonic balancer on it and put the stock bolt in like 2 to 3 threads then put the harmonic balancer puller on it and press it off using the bolt then tap around the balancer lightly when you cant go anymore, then it should be able to pull off
The balancer is already off, so I borrowed a puller from AutoZone to get the hub off.
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Old 01-10-2004, 09:57 PM
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I dont' remember for sure actually, take the stock bolt with you to a hardware store and get a smaller one that is sevaral inches long
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Old 01-10-2004, 10:53 PM
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I used a small piece of steel. (smaller than the diameter of the bolt. I did this as to not damage any of the threads on my crank. I then used a 3 prong puller with a socket pressed onto the end of the puller so that it would keep the steel rod from sliding off the end of the puller as I tightend it up. Pulled it off with no problems and threads look perfect. Hope this makes sense. kinda hard to explain. if ya get a small piece of steel and insert it you will see what I mean.

Mike
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Old 01-10-2004, 11:02 PM
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I just did this and found this page Thank God before I messed up the threads ... puller
Now if I could only figure out how to put the hub back on .. lol
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Old 01-10-2004, 11:10 PM
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1- the bolt you put in the crank snout should be thinner than the crank bolt itself, so as not to thread into the crank, but just bottom out at the end. about 6 inches long is a good length. buy the strogest grade bolt you could find (grade 8 or so), cause trust me, if it bends in there, itll be a pita to get out. the one i had used was grade 5 or so, one bent inside, and the other worked, so........

2-KEY to getting it to sldie off, is to have it setup to pull as straight as possible. i suppose you understand this. itll come off smoooooooooth as butter if its straight

hth
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Old 01-11-2004, 01:45 AM
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i went and baught a stock crank bolt for my car ($2.15) grade 9 and pulled it off with it and my threads are fine but everyone has different ways of doing things i guess.
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