Concerned about used ATI balancer (pics)
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Concerned about used ATI balancer (pics)
I bought a barely used ATI balancer for my 383 LT1, and I'm looking for opinions on what I got.
1st, there are grooves inside of the hub that are deep enough to feel as I run my finger around it:
2nd, the hub has some dents and dings. I don't know if this happed installing or uninstalling the outer ring, or pulling the hub off the crank:
I have only taken the balancer out of the box and cleaned the grease off of it. This is how I received it. What is your opinion? Should it be used as is?
1st, there are grooves inside of the hub that are deep enough to feel as I run my finger around it:
2nd, the hub has some dents and dings. I don't know if this happed installing or uninstalling the outer ring, or pulling the hub off the crank:
I have only taken the balancer out of the box and cleaned the grease off of it. This is how I received it. What is your opinion? Should it be used as is?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
ATI dampers typically need to be honed to fit the crank. It looks like someone tried to force the balancer on, resulting in the galling. I would presume they resorted to whacking it on with a hammer. Check the od of the crank and check the id of the balancer. I would guess a .001 fit is needed, but verify with ATI.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
From what I can see there's no damage in any critical areas. But there is definitely evidence of it having been handled by an incompetent.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
ATI dampers typically need to be honed to fit the crank. It looks like someone tried to force the balancer on, resulting in the galling. I would presume they resorted to whacking it on with a hammer. Check the od of the crank and check the id of the balancer. I would guess a .001 fit is needed, but verify with ATI.
And ALWAYS, they should be installed using THE PROPER TOOL.
PS that one aint pretty, but it should be just fine. Take it to the machine shop with the crank/motor. they'll know what to do with it.
Racer
Joined: Sep 2005
Posts: 271
Likes: 0
From: New Freedom PA
Agreed...Seems all the aftermarket ones we see need machining. ATI, Fluidampr, etc. We even used an off brand fluid filled balancer ONCE, because of application issues (only thing available for it) and it needed machining on the ID as well as the OD being .015 off center!!
And ALWAYS, they should be installed using THE PROPER TOOL.
PS that one aint pretty, but it should be just fine. Take it to the machine shop with the crank/motor. they'll know what to do with it.
And ALWAYS, they should be installed using THE PROPER TOOL.
PS that one aint pretty, but it should be just fine. Take it to the machine shop with the crank/motor. they'll know what to do with it.
Team Owner
Joined: Dec 2000
Posts: 27,897
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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
it was not wacked on with a hammer it was installed with a modified (shortened) Moroso Installer. When I installed the inner hub it was put in hot water first and went right on. This is the normal procedure that I use unless there is a serious difference in crankshaft size. In which case I hone the hub ( i have a flex hone sized for this ). Any scratches in it must have been upon removal. I have several of these balancers(SBC, BBC, SBF) and all have minor scratches on the inside. It has never been an issue in 10 years.
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