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The Torque Spec. Guide

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Benson X, Mar 1, 2014.

  1. Apr 27, 2016 at 6:14 PM
    #181
    jqueener

    jqueener Well-Known Member

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    By u joints do you mean the bolts that hold the driveline to the pinion flange? I just swapped my diffs so im curious. U jionts themselves dont have anything to tighten as far as i know.
     
  2. Apr 27, 2016 at 9:42 PM
    #182
    pdederko

    pdederko Member

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    Rear U bolts that hold suspension links to the axle.
     
  3. Apr 28, 2016 at 8:21 AM
    #183
    jqueener

    jqueener Well-Known Member

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    Oh, u bolts , not u jionts. And i think you mean leaf springs not suspension links. Terminology is key as thise are completely different things.
     
  4. Apr 28, 2016 at 8:38 AM
    #184
    pdederko

    pdederko Member

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    Yes, you're correct. The U bolts holding down the axle to the leaf springs. Thanks for clarifying.
     
  5. Jun 21, 2016 at 6:04 AM
    #185
    pa blaster

    pa blaster Well-Known Member

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  6. Jul 2, 2016 at 6:33 AM
    #186
    Spencer

    Spencer Future President

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    goblue82 likes this.
  7. Jul 12, 2016 at 7:21 PM
    #187
    Benson X

    Benson X [OP] ...and we're back!

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    If you don't draw blood, you're doing it wrong!
    As pointed out by @Chickenmunga, there were no diagram(s) or detailed torque specs for the Power Steering components. I updated the OP to include the Power Steering Diagrams for 2WD and 4WD - thanks for the heads-up Mike!
    :cheers:

    Also, @tcBob must've increased the attachment size limit on the (new) forum - so I was able to add the updated .PDF file here and at the bottom of the OP!!! Rejoice!!!
    :yay:
     

    Attached Files:

    Crom and tcBob like this.
  8. Jul 12, 2016 at 8:15 PM
    #188
    Chickenmunga

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    oh nice, those are better pictures than the ones I had found
     
  9. Jul 12, 2016 at 8:31 PM
    #189
    BudMan

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    @Mademan925 i should have bet you at the staircase. 83 for the wheels :p
     
  10. Jul 12, 2016 at 9:00 PM
    #190
    Mademan925

    Mademan925 Senor Taco

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    enough to go over stuff
    Well mine are at 85. :benchpress:
     
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  11. Sep 12, 2016 at 7:18 PM
    #191
    mpkramer71

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    Thank you!!!
     
  12. Sep 15, 2016 at 5:33 AM
    #192
    TacoRD16

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    As a pressure vessel engineer I would NOT use that chart as blanket for all torque applications. Torque values are a very touchy subject even in the oil and gas industry because there are a lot things to take into consideration when torquing a bolt. That is just for static equipment besides cyclic wind loads but these are vehicles that see all types of vibrations at different frequencies. The spec you are quoting does not take into consideration the application of the members you are bolting together and preload. You just stated the U-bolts should be (with assumptions of material) ~93 ft-lbs when the diagrams calls roughly 73 ft-lbs. Did that 93 ft-lbs take into consideration of the 4 bolts properly aligned on the seat? The force of the bolt from the U bend of the U-bolts and/or formed from either cold or hot work? Did it take into consideration of the axle housing bearing the clamping stress? Maybe a different material is used from what you assumed and the factory wanted a preload on the U-bolt which is why they tend to yield.Thats why people say to never reuse U-bolts. A preload of 20% of the yield is usually lost the sec you pull the wrench off the bolt through the bolt, nut and bolted members. People lives are at stake driving there vehicles so if I were you I would leave the torque values up to the manufacture.

    Not trying to scare you but I hear way to many scary lawsuits in this industry being on the design side of it all.
     
    Last edited: Sep 15, 2016
    mpkramer71 likes this.
  13. Sep 15, 2016 at 7:39 AM
    #193
    mpkramer71

    mpkramer71 KRAMERICA'1

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    Pretty reasonable advice, follow the manufactures specs whenever available. If you don't have them, use the general spec sheet to for a bench mark so you don't over due it. Lord knows I've over torqued more than one bolt in my days with a wrench...
     
  14. Sep 15, 2016 at 2:39 PM
    #194
    Benson X

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    If you don't draw blood, you're doing it wrong!
    I think you're mistaken - the confusion comes from the fact the Toyota FSM calls for the rear U-Bolts to be torqued down to 37 ft./lbs. - Thirty Seven!!!
    [​IMG]
    That's why so many of us raise a stink about it.
     
  15. Sep 15, 2016 at 4:06 PM
    #195
    Crom

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    lol circle jerk conversation going on here. I understood @AP-Tanner 's post. He was posting some useful info... No harm in that.

    Regarding the leaf spring misprint... That has been debated for years. And it's kind of dumb at this point. Anyone who works with threaded fasteners in that size, and spring shops especially, will laugh their asses off at the 37 ft.lb It's an obvious error.
     
    AP-Tanner and BudMan like this.
  16. Oct 27, 2016 at 11:57 AM
    #196
    TacoSauceHB

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  17. Oct 27, 2016 at 12:40 PM
    #197
    Chickenmunga

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    I think I might make a poster out of that for the garage
     
  18. Oct 27, 2016 at 12:47 PM
    #198
    TacoSauceHB

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    I'm trying to figure out how to save it bigger and more clear. I'm about to upgrade all 4 shocks + more upgrades to front and back so Im planning on printing this big and hanging it in my garage also for easy reference while my hands are greasy.
     
  19. Oct 27, 2016 at 2:22 PM
    #199
    Crom

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    That is for a 2WD truck. Never noticed this before but for some reason that diagram, shows LCA cam bolts / nuts at 155 ft.lbf. Not sure why. The 4WD cams which I think are the same part are specd at 100 ft.lbf.
     
  20. Nov 5, 2016 at 6:14 PM
    #200
    louiemak

    louiemak Member

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    AFE intake and Magnaflow cat back exhaust.
    Thank you for the information
     
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