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Major Balancer Wobble AFTER Install

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Old Apr 3, 2024 | 08:51 AM
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Default Major Balancer Wobble AFTER Install

Okay so, rundown of what I just did over the last week. Got my A&A secondary drive in for the car, this comes with a 10% OD IW balancer, spent around 3 days installing everything and checking over all the measurements to make sure nothing was wrong. The balancer seated and had the correct spec gap (.985"), then was torqued down to 130ftlbs (per IW instructions) with red loctite. I put everything back together, fired the car up and it instantly threw the supercharger belt towards the motor 2 ribs and tried ripping it up. Realigned everything thinking I maybe didn't check if it was on the ribs before I started it and had a buddy watch as I started the car this time. He noticed a pretty major wobble in the balancer and obviously the belt walked off again. Any reason this would happen if the balancer was seated and torqued to the correct specs? Very frustrating.

I've already begun tearing it back down so I'll hopefully be able to see what went wrong later today but just wanted to see if anyone had any ideas before I get off school.

Last edited by rykerwolf; Apr 3, 2024 at 09:05 AM.
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Old Apr 3, 2024 | 12:42 PM
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Originally Posted by rykerwolf
Okay so, rundown of what I just did over the last week. Got my A&A secondary drive in for the car, this comes with a 10% OD IW balancer, spent around 3 days installing everything and checking over all the measurements to make sure nothing was wrong. The balancer seated and had the correct spec gap (.985"), then was torqued down to 130ftlbs (per IW instructions) with red loctite. I put everything back together, fired the car up and it instantly threw the supercharger belt towards the motor 2 ribs and tried ripping it up. Realigned everything thinking I maybe didn't check if it was on the ribs before I started it and had a buddy watch as I started the car this time. He noticed a pretty major wobble in the balancer and obviously the belt walked off again. Any reason this would happen if the balancer was seated and torqued to the correct specs? Very frustrating.

I've already begun tearing it back down so I'll hopefully be able to see what went wrong later today but just wanted to see if anyone had any ideas before I get off school.
Just a wild *** guess, but if everything else on the install was correct, could be that the new balancer was not manufactured correctly, i.e. the bore was not concentric to the rim.
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Old Apr 11, 2024 | 10:28 AM
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I thought balancer bolt torque is 235-250 depending on what fastener is used.
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Old Apr 11, 2024 | 03:08 PM
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Originally Posted by rc51racer
I thought balancer bolt torque is 235-250 depending on what fastener is used.
With OE fasteners/balancer this is true. Innovators provides a bolt and washer with the 130lbft requirement though.

Incase anyone was wondering, the key on my crank had gotten misaligned and destroyed the keyway in the balancer causing it to wobble. Ruined my oil pump and brand new balancer. A little bit upset but it is what it is.
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Old Apr 11, 2024 | 07:29 PM
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Ouch, but thanks for sharing.
Just in case anyone runs across this, my new dayco stock type balancer did not seat properly until like 240 FtLbs, then it popped and looked fully seated.
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