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Thread: Crank pulley bolt

  1. #1
    Join Date
    Jan 2008
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    Malvern, AR
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    Crank pulley bolt

    Do I need a longer crank pulley bolt when i do my cam swap? If so where can I find one?
    99 GMC 5.3 RCSS, K&N, E-Fans, Headman Shorties, Built 4L60E, 220/220 .581/.581 112, 80mmm TB, Nelson Tuned

  2. #2
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    Nov 2003
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    Denton Texas
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    Nope
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
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    Not longer....but if you go GM bolt you need a new one. It's one time use, torque to yield.

  4. #4
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    Yep. I new factory crank bolt its like $4.00
    DANIEL CAMMED SS 13.46 @ 98.17-- 8.58 @ 80.31

    2003 Silverado SS / LQ9 6.0L / Wheatley 93 Octane Tune / 224/228 .581 .588 110lsa / Patriot Gold Dual Springs / Comp Hardened Push Rods / Circle D 3800 stall / Pacesetter LT's / 4:10 Gears / Transgo HD-2 Shift Kit / K & N Cold Air Intake / Corvette Servo / Aeroforce Interceptor / Autometer Narrorband(Wideband on the way) / Mobile 1 Synthetic / Single Chamber Flows with X Pipe / Cats Delete with Cutouts


  5. #5
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    Jun 2008
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    Ft worth tx
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    Do you need a new/longer bolt when you put in a new harmoninc balancer pulley? Sorry to jack the thread!
    2004 Gmc VHO (LQ9), AEM cai, perma cool e-fans, aero turbine 3535,obx lt's,undedrive pulley w/overdrive alt pulley, lingenfelter 160 t-stat, zippy tune, taylor 10.4mm wires, tb bypass, Transgo HD-2 c, corvette servos, sonnax accumulator piston's,2600 stall,30,000 trans cooler lowered 1.5"/2", boss 313 22's on 285/45's, rollpan,shaved tailgate w/ss spoiler, painted interior, 2 solo l7 12's,custom fiberglass box,Pioneer F-900 Navi,SSS gauges,billet shiter and pedals,hid's (low's and fogs).

  6. #6
    Join Date
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    That was the OP's question. The pulley is part of the balancer...and requires a new bolt every time it's removed. You'll also need an installer and a torque angle wrench to reinstall it.

  7. #7
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    Installer? Propane torch to heat the snout up works fine to get it started on and then wrench it the rest of the way on with the old bolt. Torque angle can be guestimated if you know that 360 degrees is a full turn and 180 degrees is one-half. Hopefully he can figure that out. Follow the GM torque procedure for tightening the bolt.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  8. #8
    Join Date
    May 2006
    Location
    Waco TX
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    Quote Originally Posted by RedHeartbeat View Post
    Installer? Propane torch to heat the snout up works fine to get it started on and then wrench it the rest of the way on with the old bolt. Torque angle can be guestimated if you know that 360 degrees is a full turn and 180 degrees is one-half. Hopefully he can figure that out. Follow the GM torque procedure for tightening the bolt.
    I always use a torch
    DANIEL CAMMED SS 13.46 @ 98.17-- 8.58 @ 80.31

    2003 Silverado SS / LQ9 6.0L / Wheatley 93 Octane Tune / 224/228 .581 .588 110lsa / Patriot Gold Dual Springs / Comp Hardened Push Rods / Circle D 3800 stall / Pacesetter LT's / 4:10 Gears / Transgo HD-2 Shift Kit / K & N Cold Air Intake / Corvette Servo / Aeroforce Interceptor / Autometer Narrorband(Wideband on the way) / Mobile 1 Synthetic / Single Chamber Flows with X Pipe / Cats Delete with Cutouts


  9. #9
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    Cool. Use what you have, just make sure it's on ALL the way BEFORE the torque sequence is done with the new bolt.

  10. #10
    Join Date
    Jun 2008
    Location
    Ft worth tx
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    Sorry I did'nt explain my situation correctly, I know you need a new bolt, and I know what the harmonic balancer is part of, but I am putting in underdrive pulleys and need to know if you need a longer bolt.
    2004 Gmc VHO (LQ9), AEM cai, perma cool e-fans, aero turbine 3535,obx lt's,undedrive pulley w/overdrive alt pulley, lingenfelter 160 t-stat, zippy tune, taylor 10.4mm wires, tb bypass, Transgo HD-2 c, corvette servos, sonnax accumulator piston's,2600 stall,30,000 trans cooler lowered 1.5"/2", boss 313 22's on 285/45's, rollpan,shaved tailgate w/ss spoiler, painted interior, 2 solo l7 12's,custom fiberglass box,Pioneer F-900 Navi,SSS gauges,billet shiter and pedals,hid's (low's and fogs).

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