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what's the horsepower of this engine

Discussion in 'Ask An Owner Operator' started by pete159, Oct 6, 2025 at 11:05 AM.

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  1. Oct 6, 2025 at 11:05 AM #1
    pete159

    pete159 Light Load Member

    106
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    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 at 11:05 AM
    pete159, Oct 6, 2025 at 11:05 AM
    #1
    blairandgretchen Thanks this.
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  3. Oct 6, 2025 at 11:05 AM #2
    pete159

    pete159 Light Load Member

    106
    68
    Dec 6, 2008
    mississauga
    0
     

    Attached Files:

    pete159, Oct 6, 2025 at 11:05 AM
    pete159, Oct 6, 2025 at 11:05 AM
    #2
  4. Oct 6, 2025 at 11:21 AM #3
    DUNE-T

    DUNE-T Road Train Member

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    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 at 11:21 AM
    DUNE-T, Oct 6, 2025 at 11:21 AM
    #3
    jcatel, blairandgretchen, 86scotty and 2 others Thank this.
  5. Oct 6, 2025 at 11:22 AM #4
    Jake Metzger

    Jake Metzger Bobtail Member

    13
    37
    Nov 13, 2009
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    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 at 11:22 AM
    Jake Metzger, Oct 6, 2025 at 11:22 AM
    #4
    D.Tibbitt, Oxbow, 77fib77 and 2 others Thank this.
  7. Oct 6, 2025 at 1:27 PM #5
    Boardhauler

    Boardhauler Road Train Member

    1,722
    3,583
    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 at 1:27 PM
    Boardhauler, Oct 6, 2025 at 1:27 PM
    #5
    86scotty, Big Road Skateboard, Numb and 1 other person Thank this.
  8. Oct 6, 2025 at 2:07 PM #6
    blairandgretchen

    blairandgretchen Road Train Member

    13,457
    72,645
    Dec 9, 2011
    South west Missouri
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    Stick it on a Dyno and you’ll find out.
     
    blairandgretchen, Oct 6, 2025 at 2:07 PM
    blairandgretchen, Oct 6, 2025 at 2:07 PM
    #6
    Oxbow Thanks this.
  9. Oct 6, 2025 at 3:02 PM #7
    Banker

    Banker Road Train Member

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    Aug 19, 2012
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    Somewhere between 400 and 605 when it was new. IMG_1180.png
     
    Banker, Oct 6, 2025 at 3:02 PM
    Banker, Oct 6, 2025 at 3:02 PM
    #7
    Oxbow and jcatel Thank this.
  10. Oct 6, 2025 at 3:48 PM #8
    Long FLD

    Long FLD Road Train Member

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    Mar 4, 2015
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    Might wanna top off the coolant before you fire it up.
     
    Long FLD, Oct 6, 2025 at 3:48 PM
    Long FLD, Oct 6, 2025 at 3:48 PM
    #8
    Oxbow, RockinChair and mitrucker Thank this.
  11. Oct 6, 2025 at 3:55 PM #9
    mitrucker

    mitrucker Road Train Member

    5,346
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    Dec 15, 2010
    Lapeer, MI
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    And keep an extra coolant level sensor handy. Listening to the dash “ding” at you for extended periods SUCKS!!!!!
     
    mitrucker, Oct 6, 2025 at 3:55 PM
    mitrucker, Oct 6, 2025 at 3:55 PM
    #9
    TurkeyCreekJackJohnson and Oxbow Thank this.
  12. Oct 6, 2025 at 4:22 PM #10
    77fib77

    77fib77 Road Train Member

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    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 at 4:22 PM
    77fib77, Oct 6, 2025 at 4:22 PM
    #10
    exhausted379 Thanks this.
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