[Z06] ATI harmonic balancer
07-29-2018, 02:14 AM
#2
Drifting
No.
07-29-2018, 08:52 AM
#4
Team Owner
07-29-2018, 02:14 PM
#7
I didnt the 1st time and it spun off. Keyed and locktited the bolt and no issues since. Given how much work it is, id do it the 1st time and not risk it
07-29-2018, 06:58 PM
#8
Melting Slicks
I have installed a few on NA cars that did not have keyed cranks. They were all within the suggested crank diameter spec that comes with the balancer. If you are outside of that spec on the small side, I would pin it. I haven't had it happen but have heard of them spinning on the crank. I'm guessing it was due to being too loose.
Oh, and use an ARP bolt. Toss the lube in the trash and use red loctite.
Last edited by User Omega; 07-29-2018 at 07:01 PM.
08-07-2018, 11:11 AM
#10
If you use red locktite on the bolt how much harder is it to remove it in the future? Has anyone ever used green locktite on the damper? Green is for bearing an sleeve retention.
Last edited by jimbob8915; 08-07-2018 at 11:17 AM.
08-07-2018, 03:59 PM
#11
Drifting
I have installed a few on NA cars that did not have keyed cranks. They were all within the suggested crank diameter spec that comes with the balancer. If you are outside of that spec on the small side, I would pin it. I haven't had it happen but have heard of them spinning on the crank. I'm guessing it was due to being too loose.
Oh, and use an ARP bolt. Toss the lube in the trash and use red loctite.
Oh, and use an ARP bolt. Toss the lube in the trash and use red loctite.
http://www.atiracing.com/instruction...LS7-Damper.pdf
Last edited by BigVette427; 08-07-2018 at 04:04 PM.
08-07-2018, 05:41 PM
#12
Le Mans Master
i just got back home with a loaner torque wrench from o'reillys that goes to 250 ft lbs. the hub is on with the pin in place and just need to finish the torque sequence. the balancer will be re-bolted to the hub shortly.
only needing a torgue wrench that goes to 250 ft lbs once every 4-6 years i cannot justify purchasing, too many $$ for a good one.
only needing a torgue wrench that goes to 250 ft lbs once every 4-6 years i cannot justify purchasing, too many $$ for a good one.
08-07-2018, 06:56 PM
#13
Melting Slicks
I think the problem most people have is getting a torque wrench that goes out to 235 ft.lbs., and accurately torquing the bolt, as ARP calls for. ATI says to use 262 red loctite with an ARP bolt, on top of 230 ft/lbs, but that isn't what ARP says. That, and I'm assuming ATI has remedied their LS7 balancer issues.
The bolt is harder to break loose and has some resistance as you come out with it. *Before reinstalling you will need to clean the bolt and the crank threads.
08-08-2018, 08:05 AM
#15
This is certainly the problem...people not having the tools for the job. The difference between 230 and 235 is rounding error...as for the lube ATI bases their suggestion on exact application but ARP does it based on the size of the bolt for proper loading.
I think the problem most people have is getting a torque wrench that goes out to 235 ft.lbs., and accurately torquing the bolt, as ARP calls for. ATI says to use 262 red loctite with an ARP bolt, on top of 230 ft/lbs, but that isn't what ARP says. That, and I'm assuming ATI has remedied their LS7 balancer issues.
http://www.atiracing.com/instruction...LS7-Damper.pdf
http://www.atiracing.com/instruction...LS7-Damper.pdf
08-08-2018, 10:21 AM
#16
No way I'd use red locktite on a damper bolt. Maybe blue, but not red. I used neither with the ARP bolt three different times on this engine now, and every time I removed the damper, it was as tight as the day I installed it.
Kinda silly to not pin the ATI when installing it. The pin kit is stupid expensive for what it is, but you might find one used for a lot less.
SnapOn has a second line of torque wrenches that are reasonably priced (CDI), and very high quality. No reason to not have a 1/4, 3/8, and 1/2 drives in the tool box.
Kinda silly to not pin the ATI when installing it. The pin kit is stupid expensive for what it is, but you might find one used for a lot less.
SnapOn has a second line of torque wrenches that are reasonably priced (CDI), and very high quality. No reason to not have a 1/4, 3/8, and 1/2 drives in the tool box.
08-08-2018, 04:55 PM
#17
Le Mans Master
most 1/2" torque wrenches only go to 150 ft lbs which is 99% of everything to be torqued on an automobile. i only need a 250 wrench for the balancer and the c4 rear bearings.
