Cannot tighten flywheel bolts anymore

Discussion in 'Ask An Owner Operator' started by MyLotion, Jun 29, 2022.

  1. Nostalgic

    Nostalgic Road Train Member

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    Not a hard and fast rule. Torque plus degrees doesn't always mean it's a torque to yield bolt. Sometimes it just a way to guarantee a pre-determined tension without dealing with variables of friction at higher torque ranges.
     
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  3. buddyd157

    buddyd157 Road Train Member

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    there is a "dial indicator" made specifically for this purpose, and should you ever need it, it'll be useful, rather than to guess the angle or degrees.

    this is just one...


    https://shop.advanceautoparts.com/p..._OXotkLS4epRXBzS0ocaAmGvEALw_wcB&gclsrc=aw.ds

    and Amazon sells the OTC brand, a very good tool shop mechanics rely on
     
  4. Ridgeline

    Ridgeline Road Train Member

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    No they are not but I would replace them too.

    the reason why the flywheel bolts are like that is they take up shock forces of the engine which causes the sheer forces highest at that point around the hub where the flywheel is attached. Some engines produce more forces than others (hp is not a factor) so it is a critical point in the rotating unit of the engine. the clutch cover and other items don’t see those shock forces and the sheer forces are no where near as much so some high grade bolts that are rated at 150k psi will work well.
     
  5. God prefers Diesels

    God prefers Diesels Road Train Member

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    Cummins main bolts, for example.
     
  6. Keepforgettingmypassword

    Keepforgettingmypassword Heavy Load Member

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    Thank you. But how does one torque to that?
     
  7. D.Tibbitt

    D.Tibbitt Road Train Member

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    All hexagons are measured in metric inches . geez cmon catmando we learn that one in 4th grade ! :D
     
    Nostalgic and Oxbow Thank this.
  8. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    If it's a torque/turn, you torque to the specified torque. Say main bolts at 145ft lbs +60*. Torque to 145, then mark the point of a hex bolt on the main cap, count back 2 flats, and mark that point on the bolt(i use white out). Then turn the bolt so the marks line up.

    Done
     
  9. REALITY098765

    REALITY098765 Road Train Member

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    I use an imaginary clock. 1/3 of a circle clock is 4 numbers for example 12 to4 0 clock 2 to 6 o clock etc.
    That probably won't work in a digital world though.
    Some people will just have to use a gage, other wise it won't be good enough.
    I guess it depends on if you are on by the hour or flat rate LOL.
     
  10. Keepforgettingmypassword

    Keepforgettingmypassword Heavy Load Member

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    Nice.
     
  11. Keepforgettingmypassword

    Keepforgettingmypassword Heavy Load Member

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    Nice
     
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