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what's the horsepower of this engine

Discussion in 'Ask An Owner Operator' started by pete159, Oct 6, 2025.

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  1. Oct 6, 2025 #1
    pete159

    pete159 Light Load Member

    106
    68
    Dec 6, 2008
    mississauga
    0
    Hi I'll be getting a Peterbilt 579 in a couple weeks I'm just curious what the horsepower is as I don't see it written anywhere
     
    pete159, Oct 6, 2025
    pete159, Oct 6, 2025
    #1
    blairandgretchen Thanks this.
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  3. Oct 6, 2025 #2
    pete159

    pete159 Light Load Member

    106
    68
    Dec 6, 2008
    mississauga
    0
     

    Attached Files:

    pete159, Oct 6, 2025
    pete159, Oct 6, 2025
    #2
  4. Oct 6, 2025 #3
    DUNE-T

    DUNE-T Road Train Member

    7,001
    17,016
    May 10, 2015
    Detroit, MI
    0
    How are we supposed to know? Get the serial number and call Cummins or check on their website
     
    DUNE-T, Oct 6, 2025
    DUNE-T, Oct 6, 2025
    #3
    Siinman, jcatel, blairandgretchen and 3 others Thank this.
  5. Oct 6, 2025 #4
    Jake Metzger

    Jake Metzger Bobtail Member

    13
    37
    Nov 13, 2009
    0
    Theres a black tag on the drivers side of the valve cover on the front of the engine. Will have all the relevant info on it. Horsepower, torque, CPL, etc.
     
    Jake Metzger, Oct 6, 2025
    Jake Metzger, Oct 6, 2025
    #4
    D.Tibbitt, Oxbow, 77fib77 and 2 others Thank this.
  7. Oct 6, 2025 #5
    Boardhauler

    Boardhauler Road Train Member

    1,729
    3,646
    Dec 21, 2008
    Ballin' in it for Shakey
    0
    Buying a truck without knowing what the horsepower is (Do you know what make the engine is?) sounds like a sure fire recipe for business success.
     
    Boardhauler, Oct 6, 2025
    Boardhauler, Oct 6, 2025
    #5
    86scotty, Big Road Skateboard, Numb and 1 other person Thank this.
  8. Oct 6, 2025 #6
    blairandgretchen

    blairandgretchen Road Train Member

    13,542
    73,402
    Dec 9, 2011
    South west Missouri
    0
    Stick it on a Dyno and you’ll find out.
     
    blairandgretchen, Oct 6, 2025
    blairandgretchen, Oct 6, 2025
    #6
    Oxbow Thanks this.
  9. Oct 6, 2025 #7
    Banker

    Banker Road Train Member

    4,236
    12,834
    Aug 19, 2012
    0
    Somewhere between 400 and 605 when it was new. IMG_1180.png
     
    Banker, Oct 6, 2025
    Banker, Oct 6, 2025
    #7
    Oxbow and jcatel Thank this.
  10. Oct 6, 2025 #8
    Long FLD

    Long FLD Road Train Member

    12,237
    50,608
    Mar 4, 2015
    0
    Might wanna top off the coolant before you fire it up.
     
    Long FLD, Oct 6, 2025
    Long FLD, Oct 6, 2025
    #8
    Oxbow, RockinChair and mitrucker Thank this.
  11. Oct 6, 2025 #9
    mitrucker

    mitrucker Road Train Member

    5,359
    9,749
    Dec 15, 2010
    Lapeer, MI
    0
    And keep an extra coolant level sensor handy. Listening to the dash “ding” at you for extended periods SUCKS!!!!!
     
    mitrucker, Oct 6, 2025
    mitrucker, Oct 6, 2025
    #9
    TurkeyCreekJackJohnson and Oxbow Thank this.
  12. Oct 6, 2025 #10
    77fib77

    77fib77 Road Train Member

    11,045
    70,753
    Jul 7, 2010
    St Louis
    0
    Check the glove compartment box. I have had trucks that have HP rating there. Or stickers inside the door frame.
     
    77fib77, Oct 6, 2025
    77fib77, Oct 6, 2025
    #10
    exhausted379 Thanks this.
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