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PACCAR PACK2 INJECTOR FAILED AGAIN. replaced under warranty but still knocking

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by c.w, Dec 15, 2025.

  1. Dec 15, 2025 #1
    c.w

    c.w Light Load Member

    108
    49
    Jun 26, 2021
    0
    I DONT FEEL PACK2 CAN SOLVE THE KNOCKING ......
    DOES ANY ONE KNOWS ?

    I got to replaced twice，first time by warranty at 270k miles , then failed on 440k miles....
    changed to PACK2 , but after less than 10k miles.
    knocking back again and fuel efficiency very bad...
    some one saying they just enlarged the holes on injector?
     
    Last edited: Dec 16, 2025
    c.w, Dec 15, 2025
    c.w, Dec 15, 2025
    #1
    Lane=addict Thanks this.
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  3. Dec 15, 2025 #2
    Lane=addict

    Lane=addict Light Load Member

    142
    151
    Aug 12, 2024
    Earth
    0
    Keep taking it back. Its their issue until warranty is done. Those engines are only good for so long. Than you do not inframe it. You order a complete reman.
     
    Lane=addict, Dec 15, 2025
    Lane=addict, Dec 15, 2025
    #2
    c.w Thanks this.
  4. Dec 17, 2025 #3
    c.w

    c.w Light Load Member

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    Jun 26, 2021
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    I agree
     
    c.w, Dec 17, 2025
    c.w, Dec 17, 2025
    #3
    Lane=addict Thanks this.
  5. Jan 15, 2026 at 9:42 AM #4
    2hot2handle

    2hot2handle Light Load Member

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    Aug 25, 2015
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    Any update?
     
    2hot2handle, Jan 15, 2026 at 9:42 AM
    2hot2handle, Jan 15, 2026 at 9:42 AM
    #4
  7. Jan 15, 2026 at 10:12 AM #5
    NorthEastTrucker

    NorthEastTrucker Road Train Member

    1,004
    1,887
    Sep 21, 2019
    0
    A.i. says this about the MX13:

    Common Paccar MX-13 engine problems often involve emissions systems (EGR valve clogging), fuel system issues (injector failures, hand primer pump), turbocharger trouble, and cooling system failures, leading to power loss, rough idling, and overheating, with recent models (2021+) seeing more frequent injector and electronic component failures.

    I only wish I saw this in 2022 when I purchased my Peterbilt with the Paccar.

    The majority says there are problems with this motor so that shows merit regarding the facts.
     
    NorthEastTrucker, Jan 15, 2026 at 10:12 AM
    NorthEastTrucker, Jan 15, 2026 at 10:12 AM
    #5
  8. Jan 15, 2026 at 1:03 PM #6
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    9,369
    30,353
    Jan 20, 2010
    Hesperia, Ca.
    0
    STAY AWAY FROM ALL “BIO-DIESEL” fuels. That’s the main issue.
     
    Diesel Dave, Jan 15, 2026 at 1:03 PM
    Diesel Dave, Jan 15, 2026 at 1:03 PM
    #6
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