[Z06] ATI LS7 damper failures?
10-10-2016, 09:47 PM
#21
Drifting
My bolts holding the hub together sheared.
Do a quick google search with the phrase "ati damper sheared"
You'll find a frw thread across diferent platforms with this issue
Do a quick google search with the phrase "ati damper sheared"
You'll find a frw thread across diferent platforms with this issue
10-11-2016, 10:10 AM
#22
Pro
Pro Mechanic
Who @ ATI?
Who have you been dealing with @ ATI? I have 2 Built LS7s going in their cars next week. Would like to find out if they are having issues now. I called yesterday. The guy said must be improper install.
I was a fluidamper person myself. This forum has swayed my customers into ATI requests over the years. The fluidamper can have balance issues if driven lightly. Nothing to wear out though,
I was a fluidamper person myself. This forum has swayed my customers into ATI requests over the years. The fluidamper can have balance issues if driven lightly. Nothing to wear out though,
Last edited by John B; 10-11-2016 at 10:11 AM.
10-11-2016, 10:28 AM
#23
Race Director
Who have you been dealing with @ ATI? I have 2 Built LS7s going in their cars next week. Would like to find out if they are having issues now. I called yesterday. The guy said must be improper install.
I was a fluidamper person myself. This forum has swayed my customers into ATI requests over the years. The fluidamper can have balance issues if driven lightly. Nothing to wear out though,
I was a fluidamper person myself. This forum has swayed my customers into ATI requests over the years. The fluidamper can have balance issues if driven lightly. Nothing to wear out though,
10-11-2016, 11:20 AM
#24
By driven lightly are you stating typical daily driver cars that rarely see any aggressive rpm? Would this be due to the fluid inside settling and being too thick to even out unless rpm gets cracked moderately high?
10-12-2016, 02:47 AM
#25
Supporting Vendor
Member Since: Sep 2013
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We were not aware of any ATI failures. We have had a few of them come to us with no hardware which from reading outposts post was a good thing since we used our own rated hardware.
Are the know issues with the hardware or the product itself?
Are the know issues with the hardware or the product itself?
10-12-2016, 06:41 AM
#26
Burning Brakes
What hardware did you use?
10-12-2016, 10:16 AM
#27
Race Director
See my post here: https://www.corvetteforum.com/forums...chronicle.html
10-12-2016, 11:43 AM
#28
Safety Car
Thread Starter
Dave - Was it the hub that is pressed onto the crank, or the outer shell?
By just looking at other's reports on what failed, there seems to be different components identified. It's difficult for me to determine if in fact the failure mode is the same. That in itself suggests installation, verse a single component failing from a design or manufacturing defect.
By just looking at other's reports on what failed, there seems to be different components identified. It's difficult for me to determine if in fact the failure mode is the same. That in itself suggests installation, verse a single component failing from a design or manufacturing defect.
10-12-2016, 05:26 PM
#29
Race Director
Dave - Was it the hub that is pressed onto the crank, or the outer shell?
By just looking at other's reports on what failed, there seems to be different components identified. It's difficult for me to determine if in fact the failure mode is the same. That in itself suggests installation, verse a single component failing from a design or manufacturing defect.
By just looking at other's reports on what failed, there seems to be different components identified. It's difficult for me to determine if in fact the failure mode is the same. That in itself suggests installation, verse a single component failing from a design or manufacturing defect.
05-27-2017, 09:59 PM
#31
Racer
In my case, the hub apparently was improperly heat treated. When the hub failed the heads of 7 torx bolts sheared off.
See my post here: https://www.corvetteforum.com/forums...chronicle.html
See my post here: https://www.corvetteforum.com/forums...chronicle.html
05-28-2017, 12:04 AM
#32
Race Director
05-28-2017, 11:35 AM
#33
Safety Car
Thread Starter
05-28-2017, 06:02 PM
#34
Racer
05-28-2017, 06:04 PM
#35
Racer
05-29-2017, 08:16 AM
#36
Melting Slicks
Regular size has 9 bolts also.
05-29-2017, 04:05 PM
#39
Burning Brakes
Had the same issue with sheared bolts
ATI replaced it free of charge
New pulley, we fitted all 9 taper bolts, lapped them in. Probably 85-95% full contact now
Upgraded bolts
Used loctite blue and their primer/cleaner
Print stripped all bolts to monitor them
ATI replaced it free of charge
New pulley, we fitted all 9 taper bolts, lapped them in. Probably 85-95% full contact now
Upgraded bolts
Used loctite blue and their primer/cleaner
Print stripped all bolts to monitor them
05-29-2017, 05:33 PM
#40
Lets take a look from a different angle here...
What is the difference between the LS7 having the issues that the other engines do not have...is the crank flexing that much more than the other platforms due to being much lighter and different material? We all have alt, power steering, water pump etc so it cant be accessory load causing it...
We really only rev a few hundred rpm higher on average (i know momentum is squared but still).
My only thought is that our cranks are flexing back and fourth at extreme angles that the ati bolted design can't handle when the rubber is doing its job trying to dampen it.
What is the difference between the LS7 having the issues that the other engines do not have...is the crank flexing that much more than the other platforms due to being much lighter and different material? We all have alt, power steering, water pump etc so it cant be accessory load causing it...
We really only rev a few hundred rpm higher on average (i know momentum is squared but still).
My only thought is that our cranks are flexing back and fourth at extreme angles that the ati bolted design can't handle when the rubber is doing its job trying to dampen it.