Harmonic Balancer Fell Off Twice
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
I just noticed that, do they have a hub that I could use, honestly pulling the motor is beyond my ability and free time and I don't have the money right now to pay someone to do it.
Is there another option where the hub and damper are seperate so I can install it without pulling the motor?
Is there another option where the hub and damper are seperate so I can install it without pulling the motor?
Team Owner
Joined: Dec 2000
Posts: 27,897
Likes: 9
From: I have no tolerence for liberals and fools, but sometimes i repeat myself
CI 3-5-7-8-9 Veteran
St. Jude Donor '08
I just noticed that, do they have a hub that I could use, honestly pulling the motor is beyond my ability and free time and I don't have the money right now to pay someone to do it.
Is there another option where the hub and damper are seperate so I can install it without pulling the motor?
Is there another option where the hub and damper are seperate so I can install it without pulling the motor?
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Just talked to the guys at TPIS, sounds like I should be able to just unbolt the headers and lift the engine the few extra inches to get the clearance to get the ATI damper and hub on.
Race Director
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From: moraga ca
Race Director
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From: Slidell Louisiana
http://forums.corvetteforum.com/c4-t...b-removal.html
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
So if your crank is good to go for stock hub you may be in luck.
Oh in regards to your spacer question, yes, the ATI spacer should go in unless you have a 1996 with OBD II
Mike
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Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Oops sorry I never did mention in this post, its not a stock crank, I did a 383 build. The engine was also internally balanced and the ati damper is a neutral balance, in that case does it matter how I line it up? That could be the other problem, I don't know how the stock one was aligned with the camshaft markings as mentioned earlier and I know after the first time we put it back on I did not align any markings.
I suppose I just need to measure the diameter of the crankshaft, is there a best way to do this?
Any recommendation on the bolt for the crankshaft or should I just get another stock bolt?
If it needs to get honed anyway could I not just purchase a stock hub and damper and get that hub honed?
I suppose I just need to measure the diameter of the crankshaft, is there a best way to do this?
Any recommendation on the bolt for the crankshaft or should I just get another stock bolt?
If it needs to get honed anyway could I not just purchase a stock hub and damper and get that hub honed?
Last edited by n1kki6; Jun 16, 2009 at 09:15 PM.
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Last bit of info, the stroke is 3.750, from what I read in another post this should be able to use the stock hub. When it was tuned though the rpm's were raised a bit and the first time it came loose I was just of 6k rpm's and I bumped the rev limiter so the ati is probably still the best choice.
Race Director
Joined: Jan 2005
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From: Slidell Louisiana
Oops sorry I never did mention in this post, its not a stock crank, I did a 383 build. The engine was also internally balanced and the ati damper is a neutral balance, in that case does it matter how I line it up? That could be the other problem, I don't know how the stock one was aligned with the camshaft markings as mentioned earlier and I know after the first time we put it back on I did not align any markings.
I suppose I just need to measure the diameter of the crankshaft, is there a best way to do this?
Any recommendation on the bolt for the crankshaft or should I just get another stock bolt?
Stock replacement hub should not need honing but is unkeyed. Do you have a vibration issue ???
If it needs to get honed anyway could I not just purchase a stock hub and damper and get that hub honed?
I suppose I just need to measure the diameter of the crankshaft, is there a best way to do this?
Any recommendation on the bolt for the crankshaft or should I just get another stock bolt?
Stock replacement hub should not need honing but is unkeyed. Do you have a vibration issue ???
If it needs to get honed anyway could I not just purchase a stock hub and damper and get that hub honed?
The main reason for ATI is better highspeed damping, and keyed hub.
You can always get an aftermarket keyed hub which should fix your problem.
If your not spinning higher than stock, stock damper should be fine.
Good luck
Mike
Last edited by aboatguy; Jun 16, 2009 at 09:35 PM.
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
I knew you had aftermarket crank but since you were using stock hub and did not mention having it honed I stated that ; "So if your crank is good to go for stock hub you may be in luck"
The main reason for ATI is better highspeed damping, and keyed hub.
You can always get an aftermarket keyed hub which should fix your problem.
If your not spinning higher than stock, stock damper should be fine.
Good luck
Mike
The main reason for ATI is better highspeed damping, and keyed hub.
You can always get an aftermarket keyed hub which should fix your problem.
If your not spinning higher than stock, stock damper should be fine.
Good luck
Mike
I just want to make sure it does not happen again, I will probably start working on it tomorrow night.
I found this keyed hub.
http://www.thunderracing.com/catalog...&sid=432#P1253
otherwise it looks like ati has just a hub as well.
http://www.atiracing.com/products/da...ts/damserp.htm
Would I need to worry about the timing markings with the engine internally balanced?
Last edited by n1kki6; Jun 16, 2009 at 09:56 PM.
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Here is what happened to the stock washer, for the replacement bolt I used a grade 8 bolt but it was a bit longer so we put a couple extra washers on, again because at the time we though it was because the washer failed, should I go back to a new stock bolt.
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Race Director
Joined: Jan 2005
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From: Slidell Louisiana
Not stock washerI'd go for an aftermarket damper. ........and I'm not a keyboard commando I actually bought an ATI.
It is tight so I pulled engine
But it really doesnt take me long to pull or install engine.
However, look how close it ends up
Make sure to get a good hub bolt too.
However, my stock balancer and hub held up to many many blasts past 6800 I just did not feel good about having unkeyed hub.
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
Where would be a good place to get a good hub bolt, can I just go with a strong grade 8 like I did yesterday with some extra washers or should I buy the stock one and washer first to measure it?
Would this hub work, and could I reuse the balancer or should I buy a new one.
http://www.summitracing.com/parts/ATI-916096A/
or the one I posted earlier from thunder racing.
Would this hub work, and could I reuse the balancer or should I buy a new one.
http://www.summitracing.com/parts/ATI-916096A/
or the one I posted earlier from thunder racing.
Team Owner
Joined: Dec 2000
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From: I have no tolerence for liberals and fools, but sometimes i repeat myself
CI 3-5-7-8-9 Veteran
St. Jude Donor '08
the ATI hub fits the ATI balancer, thats it.
I'm no keyboard commando either. I had the ATI balancer on my 383 LT1 as well. I used an ARP balancer bolt. Once you change to an ATI balancer, the stock washer doesn't work. The ATI unit comes with one
I'm no keyboard commando either. I had the ATI balancer on my 383 LT1 as well. I used an ARP balancer bolt. Once you change to an ATI balancer, the stock washer doesn't work. The ATI unit comes with one
Thread Starter
Le Mans Master
Joined: Dec 2000
Posts: 8,740
Likes: 2
From: Minneapolis MN
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.
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.