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Fuel leaking from bottom of cat c-12 ecm

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by B5love08, Aug 11, 2023.

  1. Aug 11, 2023 #1
    B5love08

    B5love08 Light Load Member

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    Nov 20, 2019
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    I was wondering if I could jb weld or re seal a ecm? I have a 1999 cat c-12 I attached a photo of them specs.

    Thank you in advanced
     

    Attached Files:

    B5love08, Aug 11, 2023
    B5love08, Aug 11, 2023
    #1
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  3. Aug 11, 2023 #2
    ibcalm19

    ibcalm19 Road Train Member

    1,463
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    Nov 30, 2015
    Pennsylvania
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    You need to find & fix the fuel leak
     
    ibcalm19, Aug 11, 2023
    ibcalm19, Aug 11, 2023
    #2
  4. Aug 11, 2023 #3
    B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    It's leaking from the ecm...not from either fuel line to ecm either. Right from bottom
     
    B5love08, Aug 11, 2023
    B5love08, Aug 11, 2023
    #3
  5. Aug 11, 2023 #4
    AModelCat

    AModelCat Road Train Member

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    Jul 7, 2015
    Canuckistan
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    Send it out to get fixed properly. You have no idea if or when the crack will open up and flood the internals. Then it will for sure be a brick.
     
    AModelCat, Aug 11, 2023
    AModelCat, Aug 11, 2023
    #4
    ibcalm19 and B5love08 Thank this.
  7. Aug 11, 2023 #5
    little cat 500

    little cat 500 Road Train Member

    2,055
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    Jan 17, 2010
    Abbottstown PA
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    by pass ecmwill run fine
     
    little cat 500, Aug 11, 2023
    little cat 500, Aug 11, 2023
    #5
  8. Aug 11, 2023 #6
    B5love08

    B5love08 Light Load Member

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    Nov 20, 2019
    0
    How long will it be ok for without being cooled? I've heard from 6months to a year after that it's a gamble lol
     
    B5love08, Aug 11, 2023
    B5love08, Aug 11, 2023
    #6
  9. Aug 11, 2023 #7
    little cat 500

    little cat 500 Road Train Member

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    Jan 17, 2010
    Abbottstown PA
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    had a 5ek that did this ran for years after that.
     
    little cat 500, Aug 11, 2023
    little cat 500, Aug 11, 2023
    #7
    AModelCat, Sons Hero and B5love08 Thank this.
  10. Sep 24, 2023 #8
    B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    So I got a re-man ecm...resealed programmed to my 9ns engine number. Hooked it up truck ran like crap. Misfiring and check engine light and just ran crappy so I took it out and put old one back in and now thr 2 wiring clips won't stay connected in ecm and truck won't run. Having a nervous break down every day truck is down I lose money since it's only truck I have and I think I'm screwed any help would be awesome on what to do
     

    Attached Files:

    B5love08, Sep 24, 2023
    B5love08, Sep 24, 2023
    #8
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