Torque specs

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by TortuousAugur, Oct 20, 2021.

  1. TortuousAugur

    TortuousAugur Bobtail Member

    33
    4
    Sep 3, 2013
    Dallas, TX
    0
    Is there anywhere to find toque specs to help facilitate changing parts on a truck? I've had mixed luck with calling a dealer/mechanic garage and was wishing there was some kind of dedicated database where you could look up specs by part or year, make and model.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Goodysnap

    Goodysnap Road Train Member

    2,626
    6,005
    Jul 12, 2017
    0
    No such animal.

    Generic torque specs by bolt size, thead and grade of bolt are your best bet and hard to go wrong.

    Engine and trans bolt torques should always follow service manual literature for the specific component.
     
    D.Tibbitt, TortuousAugur and AModelCat Thank this.
  4. TortuousAugur

    TortuousAugur Bobtail Member

    33
    4
    Sep 3, 2013
    Dallas, TX
    0
    How do you find out the grade of a bolt? I've currently got a secondary fan belt tensioner pulley that I need to change out. Being that the mounting material is the engine itself, what torque spec would I look up for that?
     
  5. jason6541

    jason6541 Road Train Member

    2,075
    4,058
    Mar 5, 2012
    Omaha, NE
    0
    Here’s a start
     

    Attached Files:

    lester and TortuousAugur Thank this.
  6. jason6541

    jason6541 Road Train Member

    2,075
    4,058
    Mar 5, 2012
    Omaha, NE
    0
    A lot of fasteners you just develop a feel for how tight. Unless a critical component or mating surface. Something you droop as time goes by
     
    AModelCat Thanks this.
  7. lester

    lester Road Train Member

    1,844
    4,170
    Jan 2, 2012
    NW, Iowa
    0
    You can find a fair amount of specs on google.com. at least I could for my cat engine.

    I'm not professional mechanic but I've fixed a fair amount of crap. Personally only time I break out a torque wrench is inside the engine. Anything else I just get a feel for it. But that's something that comes with time and experience I guess.

    Generic torque specs for grade of bolt is probably a good starting point for a beginner
     
    TortuousAugur Thanks this.
  8. TortuousAugur

    TortuousAugur Bobtail Member

    33
    4
    Sep 3, 2013
    Dallas, TX
    0
    This is pretty much me. I just look up on YouTube or whatever resource I can to see if I think it's something I can do or not and if so, set about doing it.

    The current truck I'm driving I've replaced three air suspension bags, ride height leveler valve, the rear differential torque arm and have to replace the fan belt tensioning pulley, fan clutch, fan belt and engine fan solenoid from what I understand. I don't even know how the fan belt is still on with how the tensioning pulley is angled but it's been holding up so I've been letting it be but figure I should replace it before it does anything obnoxious like busting a hole in the radiator.

    The previous operators didn't seem to take care of the truck, from what I'm seeing.
     
    Last edited: Oct 20, 2021
  9. AModelCat

    AModelCat Road Train Member

    22,570
    106,905
    Jul 7, 2015
    Canuckistan
    0
    Nobody torques anything unless its something like head bolts or bearing caps.

    99% of work is usually done by feel.
     
  10. TortuousAugur

    TortuousAugur Bobtail Member

    33
    4
    Sep 3, 2013
    Dallas, TX
    0
    My only concern with that is I think someone over torqued a fan belt pulley on a previous truck I was driving because I replaced it and it stripped the threads a lot easier than I feel like it should have and I really don't want to have that happen again. Might have been whoever put the previous one on but that doubt will always be in my mind because of it.
     
    skallagrime Thanks this.
  11. skallagrime

    skallagrime Road Train Member

    1,812
    3,729
    Apr 10, 2012
    Indiana
    0
    Nothing really to add here, but LOVE the username op
     
    TortuousAugur Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted