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Torque?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 78Jimmyish, Sep 22, 2001.

  1. 78Jimmyish

    78Jimmyish 1/2 ton status

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    What's 120 foot pounds feel like? I don't have a torque wrench and the u-bolts are supposed to get tightened to 120 foot pounds. I've got a 3' breaker bar and I tightened them till I could just about lean on the bar. Good enough?
     
  2. jarheadk5

    jarheadk5 1/2 ton status

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    Find a friend with a torque wrench. Check your local auto parts stores. Go to an equipment rental place. Buy a cheap one (NOT a beam-type! Mine cost $25, goes up to 150ft/lbs, and is accurate enough for what I use it for). Whatever you've got to do to get one,

    <font color=red>USE A TORQUE WRENCH ON THOSE U-BOLTS!!!<font color=black>

    Improper torque causes most fastener failures. Do you want something like your u-bolts snapping and allowing your axle to twist about however it pleases? A few bucks to rent one, or a fwe more to buy one, is cheap insurance.


    September 11, 2001--"A date which will live in infamy"
     
  3. 78Jimmyish

    78Jimmyish 1/2 ton status

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    Well, the installation instructions I got said tighten to at least 120 foot pounds, so I wasn't worried about overtightening them. But you're saying I should be?
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Watch out on the fronts. 120 is more than enough. Spec with stock springs is 150. Problem is after market lift springs are not as wide as factory fronts. I don't know if my buds torq wrench was screwed or what but when it clicked at 150 and he pulled it off I got to see a bent sping plate with the u-bolt angled off about 15 degrees. He wasn't busting a gut so I don't think he wrench was to far off. 150ft is a LOT. Thats usualy hang on it or brace your foot on it level.

    I don't need no damn shop manual, I got a pornographic memory.
    <a target="_blank" href=http://communities.msn.com/OffroadK5s>communities.msn.com/OffroadK5s</a>
    75 Jimmy, Dollar
    Grim-Reaper
     
  5. TorkDSR

    TorkDSR 1/2 ton status

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  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I know you guys like your torque wrenches, but it's my opinion that U-bolts never can get tight enough. I put the 1/2" impact on it and let it run wild.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  7. Pugsley

    Pugsley 1/2 ton status

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    Just wait till you break one - I tried the impact technique, and smacked myself in the face with it when the u-bolt broke off. The speed of the impact will also melt the nylon in the nut, and screw up the locking ability of it.

    Special thanks to those lost from IAFF Locals 94 and 854 - You shall never be forgotten
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     

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