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Cummins ISX Fuel Pump

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by etianlongoria, Feb 25, 2020.

  1. Feb 25, 2020 #1
    etianlongoria

    etianlongoria Bobtail Member

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    Feb 25, 2020
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    Hi, I have a 2012 Peterbilt 386,with a Cummins ISX, but this truck came with a engine that was manufactured by Cummins ReCon ,with date 01/18/16, now I have a few questions, is this fuel pump from 2016 also?I have to be worried with this fuel pump?, any way to know if this fuel pump has ceramic or steel plungers?
     
    etianlongoria, Feb 25, 2020
    etianlongoria, Feb 25, 2020
    #1
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  3. Feb 25, 2020 #2
    boneebone

    boneebone Road Train Member

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    If it’s a Recon, it’s probably because the original fuel pump made a window in the original block and the entire engine was replaced by Cummins.

    The Recon most likely has the updated fuel pump with the steel plungers.
     
    Last edited: Feb 25, 2020
    boneebone, Feb 25, 2020
    boneebone, Feb 25, 2020
    #2
    Hulld and bzinger Thank this.
  4. Feb 25, 2020 #3
    Hulld

    Hulld Road Train Member

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    Could have steel plungers but don’t let your guard down.
    How many miles?
    I am told they still have had some failures with the updated pump.
     
    Hulld, Feb 25, 2020
    Hulld, Feb 25, 2020
    #3
    spsauerland Thanks this.
  5. Feb 25, 2020 #4
    Goodysnap

    Goodysnap Road Train Member

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    I would most definately check or replace the oil bypass valve and make sure it's the updated one. Cheap insurance if you ask me. Tough call being a 2016 rebuild.
     
    Goodysnap, Feb 25, 2020
    Goodysnap, Feb 25, 2020
    #4
    Dave_in_AZ and spsauerland Thank this.
  6. Nov 23, 2020 #6
    W9SMJ

    W9SMJ Bobtail Member

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    Nov 23, 2020
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    I'm looking to buy a 2017 Kenworth T680 with a Cummins in it. Dealer tells me the fuel pumps in the 2017 models had been updated and were not a concern. Is this correct?
     
    W9SMJ, Nov 23, 2020
    W9SMJ, Nov 23, 2020
    #6
  7. Nov 23, 2020 #6
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Yes. And it cost an earth shattering $250 to have the ceramic ones changed to metal at Cummins in the old engine.

    I had almost 700K on mine before I swapped them.

    The 2017 also has an extra piston ring that eliminates carbon packing.
     
    Dave_in_AZ, Nov 23, 2020
    Dave_in_AZ, Nov 23, 2020
    #6
  8. Nov 23, 2020 #7
    drive-away2020

    drive-away2020 Light Load Member

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    Yeah, go ahead and get those plungers checked and or rebuilt ASAP.
     
    drive-away2020, Nov 23, 2020
    drive-away2020, Nov 23, 2020
    #7
  9. Nov 23, 2020 #8
    Bigtruckdrivah

    Bigtruckdrivah Light Load Member

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    Is this something a older ISX suffers from too? I have a 2003 IH with a ISX
     
    Bigtruckdrivah, Nov 23, 2020
    Bigtruckdrivah, Nov 23, 2020
    #8
  10. Nov 23, 2020 #9
    drive-away2020

    drive-away2020 Light Load Member

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    No. This is an issue in the 2250 and 2350 series motors. Which started in 2012 maybe late 2011
     
    drive-away2020, Nov 23, 2020
    drive-away2020, Nov 23, 2020
    #9
    Bigtruckdrivah Thanks this.
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