04-07-2018, 01:32 PM | #183 |
Drives: 9C1 Join Date: Mar 2016
Location: Albany NY
Posts: 22
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I cracked open an lsa to change out the coupler and found it already had a solid coupler. There was no wear on the shaft either. Did the factory start installing solid couplers at some point? Sent from my iPhone using Tapatalk Pro |
04-07-2018, 02:07 PM | #184 |
Drives: 2013 ZL1 M6 Join Date: Sep 2016
Location: CA Bay Area
Posts: 248
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First time I have seen one without ant grooves in it. Must have been on there since day one.
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Fast 850cc Injectors, ATI Balancer, 8.66 Lower Pulley, 2.55 Upper Pulley, Lingenfelter CAI, Kooks LT with cat delete pipes, Noweeds Exhaust Cutouts (extremely loud under full throttle), BTR Stage 3 Cam, BTR Platinum 660 Valve Spring Kit, TR7ix Iridium Spark Plugs, Lingenfelter Solid Isolator, 160 Degree Thermostat, Larger SC Coolant Reservoir with Hose Relocation Kit, BMR 1.25" Lowering Springs, MGW Short Throw Shifter, Racing Brake 2 piece rotors front and rear, Starkweather Performance Custom Dyno Tune on 91 Octane.
691.38 RWHP 630.35 RWTQ |
04-07-2018, 03:07 PM | #185 |
Drives: ZL1, 2013, tri-coat-red, manual Join Date: Nov 2013
Location: Michigan
Posts: 1,607
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04-07-2018, 09:31 PM | #186 |
Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011
Location: Trenton, Michigan
Posts: 7,047
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Curious, what kind of material is the solid isolator made of? Is it metal of some kind, rubber, or some other semi compliant material?
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04-08-2018, 02:48 AM | #187 |
Drives: 2012 ZL 1 #370 Join Date: Dec 2010
Location: Switzerland
Posts: 351
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Which part nr is your sc?
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04-08-2018, 06:39 AM | #188 |
Drives: 2013 ZL1 Join Date: Dec 2012
Location: Illinois
Posts: 807
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I believe they are resin
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'13 ZL1
'06 TBSS '98 TJ '87 GN |
04-08-2018, 09:04 AM | #189 |
Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011
Location: MN
Posts: 2,250
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That pics looks like the LPE solid one I installed in 2014. They since switched the OEM solid version which looks different.
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04-08-2018, 09:40 PM | #190 |
Drives: 2014 ZL-1 Join Date: Feb 2014
Location: In front of a computer.
Posts: 211
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04-08-2018, 11:41 PM | #191 |
Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011
Location: Trenton, Michigan
Posts: 7,047
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I was curious because the way I understood it was explained long ago was that the rotors themselves rattle/vibrate a certain amount during normal operation as they are rotating. The spring loaded isolator was designed to absorb some of that rotor rattle.
IF that's the reason for the spring, then going to a solid (metal of some kind) isolator would cure the isolator spring wearing the grooves in the shaft, but it would then no longer help dampen the rotor lobe rattle and it would be transmitted through the solid pulley to the drive belts/etc. Thus a solid metal isolator might not be the best solution as far as limiting the rotor rattle. If they (Eaton) modified the isolator to the spring loaded design but now with it packed with grease of some sort to help eliminate the grooving, they would have gone back to allowing the spring to help absorb the rotor rattle. HOWEVER, if the solid isolator was made out of some compliant material, then the compliant material would act as a rattle absorber by the nature of the compliant materials properties without the need for the spring. |
04-09-2018, 12:28 AM | #192 |
Drives: 2014 ZL-1 Join Date: Feb 2014
Location: In front of a computer.
Posts: 211
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The rotors do not inherently rattle. The rattle is a product of the lash between the rotor coupling gears as the experience continuous drive to coast. The spring coupler loads, and unloads in an attempt to silence what would otherwise rattle. The slack in the spring coupler actually caused as many problems as it attempted to fix by facilitating the very same rattle in many units. The groves in the shaft "themselves" are of little consequence, but the shrapnel they make has shown the ability to enter the drive rotor bearing in the front directly behind the coupler.
The solid coupler allowed rattling in several units too, but at least it did not make metal filings. I assume GM or Eaton threw a party when one of their brilliant engineers figured out that a heavy greased spring unit would make better all things. The grease would lubricate making the tension more linear with less wear to the shaft. It would help damp the spring coupler. And, it would catch the shrapnel. YEAH! Only one small problem... It is not 100%. Hence my car. It turned out to be a greased spring unit. The grease caught all the powder, but had slung outward to create a grease halo of sorts. The accumulation settled at the bottom of the bore until substantial enough to start drifting back. I'm sure operating temps helped this process. The grease actually helped all the metal make its way directly to the rotor bearing. BTW, my pilot shaft looked as bad as any of them at 11k miles. Three dealerships and GM customer service acknowledged my problem, but refused to do anything about it. While you technically void your warranty by having someone helpful repair your car, do not worry....that warranty at worth a squirt of pi$$. |
04-09-2018, 08:15 AM | #194 |
Drives: 2013 ZL1 and 2019 Ram Laramie Join Date: May 2017
Location: Milwaukee
Posts: 1,259
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04-09-2018, 09:30 AM | #195 | |
Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011
Location: Trenton, Michigan
Posts: 7,047
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Quote:
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04-09-2018, 11:23 AM | #196 |
Drives: 2014 ZL-1 Join Date: Feb 2014
Location: In front of a computer.
Posts: 211
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I'm not trying to school you as much as I'm trying to point out that the problem has not really been fixed. Not at least at the time my 14' was built. If it has been solved now, GM does not seem to be willing to help me out
BTW, transmitting it to the belt hurts nothing. If nothing else, the belt and tensioner would have the potential to help damp it further. |
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