Name that Sound...

Discussion in 'Modifications & DIY how-to' started by lostinthewoods, Feb 23, 2011.

  1. lostinthewoods

    lostinthewoods Frisco Tx Baller

  2. Matt

    Matt Think before you post Staff Member Supporting Member

    sounds like it's coming from the alternator/pulley/belt area. do the belts feel loose?
     
  3. lostinthewoods

    lostinthewoods Frisco Tx Baller

    belts feel fine. Just put new belts on and had them adjusted.
     
  4. integroid

    integroid Supporting Member

    Have you done a timing belt service? If so, did you replace all of the idler pulleys? If not, I would take the cover off and see if you can find the noice behind the cover somewhere. Also, taking off one belt at a time could help you diagnose if it is coming from one of the acc. belts.
     
  5. lostinthewoods

    lostinthewoods Frisco Tx Baller

    I have not done a timing belt yet. Thats what I am worried it may be.
     
  6. integroid

    integroid Supporting Member

    Yeah, you dont want one of those pulleys to lock up on you and throw the timing belt off. ANDY@killshot or any of the other forum sponsors can probably help you out.
     
  7. lostinthewoods

    lostinthewoods Frisco Tx Baller

    I agree they could help me out if they were located in Texas :)
     
  8. integroid

    integroid Supporting Member

    Well at least I tried to support our vendors:)
     
  9. Mike@TTR

    Mike@TTR Active Member

    Could also be the ac belt tensioner. I had one go out on me and nearly took out the timing cover in the process. Try squirting it with wd40 and if it quiets up, replace it! The wd will not make it better and it will eventually seize. Napa has replacements pretty cheap.
     
  10. Allpro Subaru

    Allpro Subaru Registered Vendor Supporting Member

    Agree with Mike on AC tensioner.
     
  11. lostinthewoods

    lostinthewoods Frisco Tx Baller

    i sprayed down the ac belt tensioner. No Dice. Still there.
    I may break down and take it to the stealership , blah.
     
  12. stimanmark

    stimanmark Member

    my ac pump tensioner bearing was going out and was making the same kinda noise. I replaced mine with a all metal pulley from rockauto and no more noise (stupid oe plastic)
     
  13. do the STis have that little plastic eyelet that holds the tensioner pulley for the alternator? I had a similar noise and mine was broken and ended up wearing the pulley on the bracket that holds it. It was prob checked when the belts were put on, just a thought a though.
     
  14. lostinthewoods

    lostinthewoods Frisco Tx Baller

    It was that pulley. I replaced it and va vooom the sound was gone.
     

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