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Turbo trouble

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by cat 03, Sep 9, 2023.

  1. Sep 9, 2023 #1
    cat 03

    cat 03 Bobtail Member

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    I have just put a new 3406e cat long block in a 1997 379 pete I replaced everything on the engine with new parts including the turbo. I just cranked it for the first time it started fine oil pressure came right up but when I walked around to the turbo I had black oil running into the exhaust out of turbo. I took everything apart and have clean oil going into and out of turbo into the return line and no oil going into charge air cooler. Does anyone have any ideas.
     
    cat 03, Sep 9, 2023
    cat 03, Sep 9, 2023
    #1
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  3. Sep 9, 2023 #2
    xsetra

    xsetra Road Train Member

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    Could this "Oil" be fuel with soot washed from the exhaust?
     
    xsetra, Sep 9, 2023
    xsetra, Sep 9, 2023
    #2
    AModelCat Thanks this.
  4. Sep 9, 2023 #3
    Goodysnap

    Goodysnap Road Train Member

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    Very common with new CAT parts.

    Oil by the rings because they aren’t seated yet.

    Put a load on in and do some good pulls. It will clear up after the first day.
     
    Last edited: Sep 9, 2023
    Goodysnap, Sep 9, 2023
    Goodysnap, Sep 9, 2023
    #3
    Oxbow, Stay Puft, AModelCat and 1 other person Thank this.
  5. Sep 9, 2023 #4
    cat 03

    cat 03 Bobtail Member

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    I went out and cranked it again with exhaust elbow off the turbo the oil is still building up and running out. Do I just need to run It like you said and the oil will clear itself. It looks like it would coat everything with oil. Thanks for your information
     
    cat 03, Sep 9, 2023
    cat 03, Sep 9, 2023
    #4
    Goodysnap Thanks this.
  7. Sep 9, 2023 #5
    Goodysnap

    Goodysnap Road Train Member

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    Yup. I in-framed a 6NZ some time ago. Dripping out of the flex pipe at hot idle.

    Make sure everything else is buttoned up and go pull some hills. When the boost builds it will not leak and will seat the rings.

    You can pay someone to break it in on the dyno too.
     
    Last edited: Sep 9, 2023
    Goodysnap, Sep 9, 2023
    Goodysnap, Sep 9, 2023
    #5
    Oxbow, Stay Puft, cat 03 and 1 other person Thank this.
  8. Sep 9, 2023 #6
    cat 03

    cat 03 Bobtail Member

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    Thank you I might be able to get some sleep now.
     
    cat 03, Sep 9, 2023
    cat 03, Sep 9, 2023
    #6
    Oxbow and Goodysnap Thank this.
  9. Sep 10, 2023 #7
    Rubber duck kw

    Rubber duck kw Road Train Member

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    They take a little work to get broke in right, load it up nice and heavy and pull some hills as soon as you can. Drive it like normal, don't baby it.
     
    Rubber duck kw, Sep 10, 2023
    Rubber duck kw, Sep 10, 2023
    #7
    Oxbow Thanks this.
  10. Sep 10, 2023 #8
    cat 03

    cat 03 Bobtail Member

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    Mar 22, 2013
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    Thanks for the information
     
    cat 03, Sep 10, 2023
    cat 03, Sep 10, 2023
    #8
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