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Alternator bearings Bad?

Discussion in 'General Chevy & GM Tech Questions' started by Pikey, Aug 13, 2012.

  1. Pikey

    Pikey Moderator Staff Member ROTM Winner 1000 Posts

    Hi. Recently on a road trip I noticed that I was getting this whining noise whenever my foot was on the gas. I thought it was the tac stepper motor going bad. The noise is getting louder daily. I think that my alternator bearings may be bad. I took the belt off and spun everything by hand. The only thing that sounded bad was the alt. Here is a video of it. I am sorry that it is not the best sound quality. Please let me know your thoughts. Thanks

  2. RayVoy

    RayVoy Active Member 1000 Posts

    Hard to tell. but from here it sounds ok.

    Usually, the idler pulley is the bearing to go, followed by the tensioner bearing.
  3. Pikey

    Pikey Moderator Staff Member ROTM Winner 1000 Posts

    I replaced the alternator today and the whine is gone. They sounded pretty crunchy!
  4. RayVoy

    RayVoy Active Member 1000 Posts

    trying to find the "thumbs up" smiley, but not there.

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