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Cummins isx has letters / numbers welded on the side, does this mean it as been rebuilt?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by unapez, Aug 22, 2017.

  1. Aug 22, 2017 #1
    unapez

    unapez Bobtail Member

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    My 07 isx engine has letters and numbers welded onto the head just above the exhaust manifold, on the angled section... does that mean it's been rebuilt?
     
    unapez, Aug 22, 2017
    unapez, Aug 22, 2017
    #1
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  3. Aug 24, 2017 #2
    Sharky88

    Sharky88 Heavy Load Member

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    its possible. do you know the original owner of the truck or was it a fleet truck? you can always give the vin to the dealer and see if the hear was changed or rebuilt
     
    Sharky88, Aug 24, 2017
    Sharky88, Aug 24, 2017
    #2
    unapez Thanks this.
  4. Aug 24, 2017 #3
    unapez

    unapez Bobtail Member

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    It was a fleet truck.
     
    unapez, Aug 24, 2017
    unapez, Aug 24, 2017
    #3
  5. Aug 25, 2017 #4
    Heavyd

    Heavyd Road Train Member

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    I think I have seen this many times. I think it is just casting numbers, but I will check into it.
     
    Heavyd, Aug 25, 2017
    Heavyd, Aug 25, 2017
    #4
    unapez Thanks this.
  7. Aug 25, 2017 #5
    unapez

    unapez Bobtail Member

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    Maybe scrapyard markings?
     
    unapez, Aug 25, 2017
    unapez, Aug 25, 2017
    #5
  8. Aug 26, 2017 #6
    Heavyd

    Heavyd Road Train Member

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    Yeah, those marking are casting number for dates, or mold info at the foundry or something. We have a brand new LT in the shop right now with an ISX15. It has those markings. I drew an arrow pointing to some of the numbers. It is hard to get a picture because of how cramped it is.

    ISX head.JPG
     
    Heavyd, Aug 26, 2017
    Heavyd, Aug 26, 2017
    #6
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