Engine rotation direction

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by insanityeight, Mar 14, 2020.

  1. Mar 14, 2020 #1
    insanityeight

    insanityeight Light Load Member

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    So im trying to do valve adjustment on epa10 paccar mx 13 without barring tool to turn flywheel. Is it ok to turn engine in reverse if its easier and if so how will that affect adjustment process?
     
    insanityeight, Mar 14, 2020
    insanityeight, Mar 14, 2020
    #1
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  3. Mar 14, 2020 #2
    Slapout okie

    Slapout okie Bobtail Member

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    If you turn the engine in in opposite direction the timing of all gear or chain drive components will be off due to backlash being incorrect. Bite the bullet and have a certified paccar shop do it. That way you have warranty on work
     
    Slapout okie, Mar 14, 2020
    Slapout okie, Mar 14, 2020
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    AModelCat Thanks this.
  4. Mar 14, 2020 #3
    AModelCat

    AModelCat Road Train Member

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    If you bar an engine backwards most manufacturers recommend barring it in the correct direction X amount of degrees (I've seen a wide variation of degrees from 45 to 180, check the appropriate service literature for confirmation) in order to take the backlash out. In all honesty, its easier to just turn it the proper direction.
     
    AModelCat, Mar 14, 2020
    AModelCat, Mar 14, 2020
    #3
    insanityeight and spsauerland Thank this.
  5. Mar 14, 2020 #4
    HoneyBadger67

    HoneyBadger67 Road Train Member

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    Harbor Freight sells a 3/4 drive set cheap! A barring tool is just a 3/4 ratchet and cheater pipe, if you plan on doing your own work you'll be happy to have that ratchet more than once.
     
    HoneyBadger67, Mar 14, 2020
    HoneyBadger67, Mar 14, 2020
    #4
    insanityeight Thanks this.
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