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What caused this?

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Old Jan 9, 2009 | 02:15 PM
  #1  
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Default What caused this?

Alternator/Idler bracket:

The new one is shedding small chips too.
There is no visible vibration in the pulley system/drive belt.
Thanks.
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Old Jan 9, 2009 | 02:43 PM
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Are you sure that the threads into the block are not getting stripped and making the whole bracket move a little bit?
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Old Jan 9, 2009 | 02:49 PM
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It looks like the bushing that goes between the pulley and the bracket got stuck inbetween there. Are you using a replacement pulley?
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Old Jan 9, 2009 | 05:47 PM
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i just swapped the old wheel to the new bracket.
nothing is stripped.
the shaft is shorter than is needed IMO but,
the new bracket is exactly the same as the old.
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Old Jan 9, 2009 | 09:19 PM
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I kinda had that same senario happen, the back of the pully has a backing plate and it wasn't seated correctly, yet the bolt was tightened up causing the backing plate to be partially on and off the center section. At that point the torque from the bolt bent the backing plate and it appeared to be seated correctly. The result was it rubbed like your picture and the offset pulley driver cut the serpentine belt in to two pieces and the belt flew off.
Check your bearing/pully/backing plate assembly for signs of wear.
Hope this helps ya!
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