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weird pully noise on a chevy

Discussion in 'Truck & Equipment Repair' started by Sealer People, Jan 30, 2012.

  1. Sealer People

    Sealer People Senior Member
    Messages: 210

    HI everyone, thanks in advance for any replies.

    Ive got a 1996 chevy 2500, diesel, 6.5 turbo, 4x4.

    one of the pullies holding the serpentine belt pops in and out, almost like on a clutch system it appears. Automatically, its not wobbling at all.

    Problem is, its doing it all the time & its starting to make alot of noise when popping in and out. Some sort of friction like, or grinding noise, clicking as its going in & out.

    This pully is located on the passenger side of the motor, its the lower pully, Id say about 8 inches in diameter.
    As it pulls back & forth, the serpentine belts stays straight in position.

    What Im worried about is the noise.

    Anyone know what this could be & if its a problem, expensive fix etc.

    Thanks again!
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,395

    pics??? that would be best....
  3. Idler pully sounds like.
  4. leolkfrm

    leolkfrm PlowSite.com Addict
    Messages: 1,980

    replace it...before it pops out for good and leaves you broke down....check the rest while the belt is off

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,362

    Clutch on the compressor for the A/C, turn off the defroster and it should stop cycling.
  6. Snowzilla

    Snowzilla Senior Member
    from Iowa
    Messages: 397

    Running defrost on some vehicles may even cycle the a/c compressor. The a/c clutch bearing, clutch, or complete reman.compressor w/clutch are available at most any auto parts store. Ranging from $30, $100, $200 in order mentioned. However, replacing the entire compressor would require an a/c vacuum/recharge. Since replacing just the clutch or bearing may require specialized tools you may be best off hiring done.