C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Harmonic Balancer Fell Off Twice

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Old Jun 17, 2009 | 09:43 AM
  #41  
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Originally Posted by n1kki6
Sounds good. I will get it tore down first and then decide what I am gonna do. Does the pioneer billet steel one work with the stock balancer?

Thanks for all of the help to everyone as well. I can do the work even if it takes a bit of time. I didn't have the car for 2.5 years so I am just a bit anxious. My problems come in with knowing what parts and why to buy and use, but the disassembly and re-assembly I will be fine with.
the ATI is most expensive, but it is the best PERIOD. I have no personal experience with the pioneer so I won't comment.
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Old Jun 17, 2009 | 12:36 PM
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I have a feeling this is a crank snout problem more than a dampner hub problem. Hopefully the ATI will fit a little snugger.
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Old Jun 17, 2009 | 12:41 PM
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The crankshaft that is in is not keyed, can I still use the ati?

I am guessing when I did my opti a few years ago and pulled that hub once and then with it off again for the rebuild didn't help, my stupid self probably put that crappy washer on that bolt too. Still learning.
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Old Jun 17, 2009 | 01:53 PM
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Originally Posted by n1kki6
The crankshaft that is in is not keyed, can I still use the ati?

I am guessing when I did my opti a few years ago and pulled that hub once and then with it off again for the rebuild didn't help, my stupid self probably put that crappy washer on that bolt too. Still learning.
i am sure there is a keyway in that crankshaft, you just need to look. there isn't a key in it, but the slot should be there
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Old Jun 18, 2009 | 10:44 AM
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I haven't had a chance to pull my hub yet, but I called my friend the built the engine and I guess the new crank is not slotted for a key, what options does that leave me with? I am wondering if that stock hub i had on their just did not work because it had been on and off a couple times?
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Old Jun 18, 2009 | 11:00 AM
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I've pulled my crank hub more times than I can remember (sounds like a personal issue huh), and it had no ill effect on the fit. I have a feeling that your aftermarket crank has a slightly undersized snout.
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Old Jun 18, 2009 | 11:39 AM
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just FYI...

even though there is no hub key for alignment, this is the desired relationship between the crankshaft gear, Hub and pully/balancer :



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Old Jun 18, 2009 | 12:43 PM
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What exactly are my options, should my new crankshaft be using this gear so I can use a key. Im gonna start work on it tonight.
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Old Jun 18, 2009 | 01:03 PM
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Im home for lunch so i didn't have alot of time to examine, but I just pulled the camber brace and got thcrank bolt out, and can get the hub to seemingly fall of the snout, if I try to get it back on, its very loose but obviously not tightened, but shouldn't it be hard to even press onto the snout? or would it be loose when it just resting on the end? Tonight I will tear it down more and try to get some pics.
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Old Jun 20, 2009 | 09:43 AM
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Originally Posted by n1kki6
Im home for lunch so i didn't have alot of time to examine, but I just pulled the camber brace and got thcrank bolt out, and can get the hub to seemingly fall of the snout, if I try to get it back on, its very loose but obviously not tightened, but shouldn't it be hard to even press onto the snout? or would it be loose when it just resting on the end? Tonight I will tear it down more and try to get some pics.
Hub should be a press fit.

Should not move one or off by hand.
Originally Posted by vetteman9368
i am sure there is a keyway in that crankshaft, you just need to look. there isn't a key in it, but the slot should be there



As for your crank being unkeyed......LTX uses late SBC crank shaft so the crank should be keyed.......hell even the stock cranks are keyed.
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Old Jun 20, 2009 | 09:50 AM
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Originally Posted by STL94LT1
I have a feeling this is a crank snout problem more than a dampner hub problem. Hopefully the ATI will fit a little snugger.
The crank snout needs to be checked and measured. Hopefully it's a hub problem.

Mike
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Old Jun 20, 2009 | 10:44 AM
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Originally Posted by n1kki6
Im home for lunch so i didn't have alot of time to examine, but I just pulled the camber brace and got thcrank bolt out, and can get the hub to seemingly fall of the snout, if I try to get it back on, its very loose but obviously not tightened, but shouldn't it be hard to even press onto the snout? or would it be loose when it just resting on the end? Tonight I will tear it down more and try to get some pics.
your hub is likely cracked. mine was too once it ran loose for a few minutes
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Old Jun 22, 2009 | 07:21 PM
  #53  
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I still haven't had a chance to get it all the way off. Unbolting the headers still did not give enough clearance so it looks like I would have to pull the engine to use the ATI. My mechanic measured the snout and the press should have been fine. I decided to just order another stock hub, bolt and washer since mine was bent.

The second time I put it on i used a bit longer grade 8 bolt and three washers and they bent too. I am hoping the problem is just a bad hub and using the incorrect washer. If not then its going to have to be a winter project.
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Old Jun 22, 2009 | 08:47 PM
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Originally Posted by n1kki6
I still haven't had a chance to get it all the way off. Unbolting the headers still did not give enough clearance so it looks like I would have to pull the engine to use the ATI. My mechanic measured the snout and the press should have been fine. I decided to just order another stock hub, bolt and washer since mine was bent.

The second time I put it on i used a bit longer grade 8 bolt and three washers and they bent too. I am hoping the problem is just a bad hub and using the incorrect washer. If not then its going to have to be a winter project.
Unbolting headers won't help with clearance since engine will come out with headers attached.


I installed an ATI hub with engine in car.
So I don't know if I could get ATI damper onto the hub in car.
I used the allthread and nuts used to install this seal to install hub

However, I thought it needed to go in further so I pulled the engine (I was wrong)

But pulling engine is a snap.



I believe if I were in your position, I'd take the hub to my machinist and have him check it for cracks, abnormal wear etc.....and if it checked out satisfactorily, I'd pull the engine since something else would have to be wrong.

I am certain that if I was in your situation, the only way I'd install stock hub without pulling engine and checking things out is if my machinist cut a key way in it to help lock it in place......
However, I've experienced what happens when things don't get completely checked out and I've learned that it is cheaper in the long run to check things out even when the pros are telling you everything is fine.......

Last edited by aboatguy; Jun 23, 2009 at 08:08 PM.
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Old Jun 22, 2009 | 09:54 PM
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I unbolted the headers from the heads. I haven't paid the hub yet, so I will probably work on it a bit tomorrow night and get the hub out.
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Old Jun 22, 2009 | 11:05 PM
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Edit. Reread the thread and found my answers.

Last edited by n1kki6; Jun 23, 2009 at 11:06 AM.
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Old Jun 23, 2009 | 04:12 PM
  #57  
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I give up with this damn car. Im ready to sell it as it sits. I wanted to get it running before getting rid of it but this is crazy. Guess I will call around and see who can check it out because I don't have the patience for this thing.

Edit: Just called TPIS, I think I am just going to have them check it out and get the ATI put in. I am already so deep into this things whats another $800.

Last edited by n1kki6; Jun 23, 2009 at 04:40 PM.
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Old Jun 23, 2009 | 05:33 PM
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Originally Posted by n1kki6
I am already so deep into this things whats another $800.
that's the spirit!

I just installed a new/rebuilt motor a week or so ago and just yesterday the tranny went ka-boom......my ol' girl is down at the local mom & pop custom tranny shop today getting all new guts shoved into the case for an estimated $,$$$
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Old Jun 23, 2009 | 07:31 PM
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Originally Posted by engle1147
that's the spirit!

I just installed a new/rebuilt motor a week or so ago and just yesterday the tranny went ka-boom......my ol' girl is down at the local mom & pop custom tranny shop today getting all new guts shoved into the case for an estimated $,$$$
I would rather just bring it in and get it done right, I like to work on my cars, and its not that I am not able to probably do it, but screw it, gotta pay to play, its worth the money so I don't have to do it myself. Looking at it I am sure I can get the engine out without problems but I just don't want to deal with it right now.
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Old Jul 26, 2009 | 01:08 PM
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All taken care of, they cleaned the snout up and keyed the hub, press is fine. Oil pressure is holding so I hopeing the mains are good.
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