Main Accessory Pulley Removal

Discussion in 'General Motoring' started by Joe C, Jun 14, 2006.

  1. Joe C

    Joe C Guest

    Help! I'm trying to replace the head gasket on a 1996 Saturn (1.9 Litre) and
    I can't seem to get the bolt off the main accessory pulley (bolted to the
    crankshaft). Can anyone tell me if it is a standard thread pattern (clockwise
    to tighten) or, if it is reverse threaded (clockwise to loosen)?

    We've used a significant amount of torque in the counter-clockwise direction
    to try to loosen it, but so far, no luck. Any help would be greatly
    Joe C, Jun 14, 2006
  2. Joe C

    BläBlä Guest

    Typical CCW to loosen. You need to apply heat to the bolts outer edge as
    it probably has lock tight on the bolts face.

    Cant really see it here as its angled wrong.
    BläBlä, Jun 15, 2006
  3. Joe C

    NapalmHeart Guest

    I used an air impact to remove this bolt.

    NapalmHeart, Jun 15, 2006
  4. Joe C

    Scott Guest

    Same here.

    Scott, Jun 15, 2006
  5. Thank you very much for your help. With a little luck, I'll get this tihing
    off without breaking it! Thanks again!
    Joe C via, Jun 15, 2006
  6. Joe C

    Lane Guest

    An average impact has never worked for me on this bolt. I use a 2' breaker
    bar, along with another bar wedged through the pulley spoke and resting on
    the edge of the oil pan (where it meets the block) to keep the pulley from
    turning. That busts it free nice and easy.

    Lane [ lane (at) ]
    Lane, Jun 16, 2006
  7. Joe C

    Wordsworth Guest

    I'm sure that some (many) here will say that I'm insane, but this is
    how I've dealt with this exact situation on several different

    Get a 1/2 in. drive breaker bar (I really advise against using a
    ratchet or anything less than 1/2 inch drive) and a 6-point socket
    that snugly fits the crankshaft bolt (again, avoid using a 12-point

    Support the vehicle securely on jack stands, or if possible, on its

    Place the socket/breaker bar on the crankshaft bolt so the the handle
    points in about the 4 or 5 o'clock position and brace it against
    either the floor or a sturdy part of the frame/engine cradle.

    Disable the ignition (unplug the coil-pack, pull fuses, whatever)
    The important thing here is that you do NOT want the engine to start.

    Have your friends/loved ones/pets stay clear of the engine and tap
    (read: TAP!!) the key to the start position for a split second.
    You're not trying to turn the engine (much), you just want to break
    the bolt loose).

    Check out your results... You should now be able to remove the bolt
    with little effort.

    Some will no doubt tell you "this is nuts." However, I've used this
    technique on many different engines and never had a problem.

    One caveat: don't try this on a Hondo 4 cylinder as they crank

    Good luck.

    Wordsworth, Jun 17, 2006
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