Help needed after new clutch install....
Tech Contributor
Joined: May 2008
Posts: 2,843
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From: Howell Michigan
St. Jude Donor '09-'10-'11
They welded a washer onto the PP, i figured they would of taken material out of the flywheel. who knows maybe it'll work.
I'm still using the stock slave
Yes the original flywheel has drilled holes around it and looks like tungsten or mallory slugs have been pressed in a few of the holes on the stock flywheel.... So my question is, why is everyone so against putting the stock resurfaced flywheel back in? i mean as long as the gap is right why would it be bad?
I'm still using the stock slave
Yes the original flywheel has drilled holes around it and looks like tungsten or mallory slugs have been pressed in a few of the holes on the stock flywheel.... So my question is, why is everyone so against putting the stock resurfaced flywheel back in? i mean as long as the gap is right why would it be bad?
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Pilot bearing looks beautiful and needle rollers move smoothly. Hey ARKAY, to add these washers like you mentioned you surely didn't put the entire driveline back in everytime to test this did you? If not, how did you fire your C5 up without the electrical, brakes, O2 sensors back together? I mean, didn't your car get super pissed??
I'm assuming the shop that did it for me the first time (yes this happened to 2 clutches for me) used the same approach, but they had the luxury of doing it on a lift.
Last edited by ArKay99; Dec 27, 2009 at 05:32 PM.
Thread Starter
Pro
Joined: Jun 2008
Posts: 575
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From: Oskaloosa Iowa
I 100% agree with you Eric D about the stock flywheel but what about the 14 grams they added now to the PP? My thoughts are both flywheels should be 0 balance so it shouldn't matter at all? or am i wrong?
ARKAY, that makes sense but i can't get my stupid inspection cover off with the headers on.....but I'd just leave the inspection cover off till i got the vibes fixed then take the headers off to put the cover on...... thanks for the help guys, i'll let you know the out come
ARKAY, that makes sense but i can't get my stupid inspection cover off with the headers on.....but I'd just leave the inspection cover off till i got the vibes fixed then take the headers off to put the cover on...... thanks for the help guys, i'll let you know the out come
Tech Contributor
Joined: May 2008
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From: Howell Michigan
St. Jude Donor '09-'10-'11
You need to know if the weight they added was to bring the PP to zero imbalance or the new flywheel. Without knowing this you are taking a chance of having more vibration issues. Knowing the original flywheel had added mass means your engine has internal imbalance that needs to be corrected externally at the flywheel. If you find out for sure that the mass was added to correct the imbalance of the new pressure plate, then installing your original flywheel or having the new flywheel matched to the original imbalance flywheel should take care of any vibration issue.
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I agree!!
If your OEM fly wheel has weights to OFF SET it to "XYZ" grams off ZERO balance from factory zero balance to correct for some internal engine balance issues and you install a new ZERO balance fly wheel,,,, the engine will be off XYZ grams.
Have your ZERO vibration OEM flywheel balanced checked and then have your NEW flywheel off set to the OEM flywheel imbalance to retain your ZERO IMBALANCE drive train
If your OEM fly wheel has weights to OFF SET it to "XYZ" grams off ZERO balance from factory zero balance to correct for some internal engine balance issues and you install a new ZERO balance fly wheel,,,, the engine will be off XYZ grams.
Have your ZERO vibration OEM flywheel balanced checked and then have your NEW flywheel off set to the OEM flywheel imbalance to retain your ZERO IMBALANCE drive train
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If your OEM fly wheel had ZERO vibrations, you need to take the OEM fly wheel and the new flywheel to the machine shop and have the NEW flywheel OFF SET to the same off balance the OEM fly wheel is. Then you wont have a vibration. GM uses pins to finial balance the LS engines. If yours had pins and the new flywheel does not have holes for pins, the machine shop will have to remove material to off set balance it.
BC
BC
Tech Contributor
Joined: Apr 2007
Posts: 10,924
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From: Forney Texas
If your OEM fly wheel had ZERO vibrations, you need to take the OEM fly wheel and the new flywheel to the machine shop and have the NEW flywheel OFF SET to the same off balance the OEM fly wheel is. Then you wont have a vibration. GM uses pins to finial balance the LS engines. If yours had pins and the new flywheel does not have holes for pins, the machine shop will have to remove material to off set balance it.
BC
BC
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Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
From what I understand and have gathered, the pressure plate and disk, SHOULD be zero balanced.
That way,,,once the mis balance inside the reciprocating assembly inside the block is corrected by the off balanced flywheel, any pressure plate that is zero balanced can be installed and not cause an issue.
BC
That way,,,once the mis balance inside the reciprocating assembly inside the block is corrected by the off balanced flywheel, any pressure plate that is zero balanced can be installed and not cause an issue.
BC
Le Mans Master
Joined: Dec 2008
Posts: 5,414
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From: Texas
I feel your pain I had a big issue with balance on the LS6 unit I put into my car I had vibrations from 700RPM and up , I ended up using my original flywheel just had it resurfaced. and that fixed the issue... My flywheel had the added weights what a PIA!! After all troubleshooting and efforts to balance the new assembly was said and done I ended up pulling the clutch assembly 5 times 
Drifting
Joined: Sep 2008
Posts: 1,389
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From: somewhere shooting my assault rifles
I replaced my clutch assy and I balanced the flywheel/clutch to zero balance even though manufacturer said it was balanced I checked it anyway.
I did NOT put any weights back on from stock fw or match the balance to the old flywheel as this does not need to be done and I have ZERO vibration issues.
If there are vibration issues then the aftermarket assy isnt zero balanced correctly.
I did NOT put any weights back on from stock fw or match the balance to the old flywheel as this does not need to be done and I have ZERO vibration issues.
If there are vibration issues then the aftermarket assy isnt zero balanced correctly.
Last edited by Z06supercharged; Jan 2, 2010 at 12:07 AM.
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
From what I understand and have gathered, the pressure plate and disk, SHOULD be zero balanced.
That way,,,once the mis balance inside the reciprocating assembly inside the block is corrected by the off balanced flywheel, any pressure plate that is zero balanced can be installed and not cause an issue.
BC
That way,,,once the mis balance inside the reciprocating assembly inside the block is corrected by the off balanced flywheel, any pressure plate that is zero balanced can be installed and not cause an issue.
BC
Any good manufacturer of clutch assemblies should have their products balanced to zero imbalance. If your original flywheel has correction weights installed from GM, you better match this imbalance in the replacement flywheel if you want to avoid vibrations. The only exception to this is if any internal recpicating parts have also been replaced or the engine had a vibration prior to the flywheel change.
Thread Starter
Pro
Joined: Jun 2008
Posts: 575
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From: Oskaloosa Iowa
UPDATE & LAST POST - VIBES ARE FIXED!!!!!
I ended up installing the SLP flywheel and the Spec 3+ after it was balanced, iam truely blown away it was only 14 grams off but made that much of a vibration @ 1800-3000rpms.....Anyway, didn't do anything differenet on the install and its as simple as the vibes are gone now.
Now i can start on the heads and cam install.......hopefully i don't run into as much problems lol
Thanks alot for everyones help!!
I ended up installing the SLP flywheel and the Spec 3+ after it was balanced, iam truely blown away it was only 14 grams off but made that much of a vibration @ 1800-3000rpms.....Anyway, didn't do anything differenet on the install and its as simple as the vibes are gone now.
Now i can start on the heads and cam install.......hopefully i don't run into as much problems lol
Thanks alot for everyones help!!
Last edited by Ksths2; Jan 12, 2010 at 09:21 PM.
Racer
Joined: Jan 2009
Posts: 393
Likes: 14
Good stuff indeed!
I put a manual tranny on LS1 which was originally equipped with automatic. If that's not enough thrill, I took the crank pulley off without marking it's position on crank..
Now I'm putting new LS7 clutch&flywheel and ATI supercharger pulley on this engine and I'm a little nervous after reading this thread. Yesterday I didn't know too much of LS engines, now I know just too much to sleep well.
I put a manual tranny on LS1 which was originally equipped with automatic. If that's not enough thrill, I took the crank pulley off without marking it's position on crank..
Now I'm putting new LS7 clutch&flywheel and ATI supercharger pulley on this engine and I'm a little nervous after reading this thread. Yesterday I didn't know too much of LS engines, now I know just too much to sleep well.
