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Buying used without Blowby or dyno.

Discussion in 'Ask An Owner Operator' started by Edjahman, Jun 14, 2020.

Page 1 of 4
  1. Jun 14, 2020 #1
    Edjahman

    Edjahman Medium Load Member

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    Hi.

    I'm purchasing a 2016 Mack with 300K miles on it and and done my due diligence before deciding to purchase it.

    The one thing that I did not consider is a dyno/Blowby test.

    I've literally covered all of my other bases except for that one thing.

    Is this a huge mistake?

    I could afford an overhaul but I certainly wouldn't really want to right out of the gate.

    Otherwise, the tractor is in exceptionally good condition.

    Thank you
     
    Edjahman, Jun 14, 2020
    Edjahman, Jun 14, 2020
    #1
    Deere hunter Thanks this.
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  3. Jun 14, 2020 #2
    daf105paccar

    daf105paccar Road Train Member

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    Did you run the testprograms a dealer has in the Mack software?
     
    Last edited: Jun 14, 2020
    daf105paccar, Jun 14, 2020
    daf105paccar, Jun 14, 2020
    #2
    Edjahman Thanks this.
  4. Jun 14, 2020 #3
    Edjahman

    Edjahman Medium Load Member

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    It's still at mack getting some regular maintenance stuff done to it. I'm getting an ECM dump and changing some parameters.

    I'll ask them tomorrow.

    What are these test programs?
     
    Edjahman, Jun 14, 2020
    Edjahman, Jun 14, 2020
    #3
    Deere hunter Thanks this.
  5. Jun 14, 2020 #4
    daf105paccar

    daf105paccar Road Train Member

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    I don't know the Mack program in detail.
    BUT they should have several tests like injectors,compression,.................
    With our Paccar program they can for example switch off 1 injector at a time thus testing the engine.(just to mention 1 thing)
    Talk to the guy who knows the Mack program(not the guy who greases the 5th wheel)

    Test the afterthreatment too.
    See what readings they have for the different sensors.
     
    daf105paccar, Jun 14, 2020
    daf105paccar, Jun 14, 2020
    #4
  7. Jun 14, 2020 #5
    Mid-May Trucker

    Mid-May Trucker Road Train Member

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    What engine? Does it still have warranty?
     
    Mid-May Trucker, Jun 14, 2020
    Mid-May Trucker, Jun 14, 2020
    #5
  8. Jun 14, 2020 #6
    truckdriver31

    truckdriver31 Road Train Member

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    run rig dig on vin#
     
    truckdriver31, Jun 14, 2020
    truckdriver31, Jun 14, 2020
    #6
  9. Jun 14, 2020 #7
    Edjahman

    Edjahman Medium Load Member

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    It's an MP8. Rigdig looks good. It only has a few months of factory warranty and I'm not even touching that aftermarket warranty.

    I'll ask them tomorrow.

    Thank you!
     
    Edjahman, Jun 14, 2020
    Edjahman, Jun 14, 2020
    #7
    Deere hunter Thanks this.
  10. Jun 14, 2020 #8
    AModelCat

    AModelCat Road Train Member

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    Honestly, been around trucks/equipment all my life and have never heard of blowby and dyno testing used trucks until I joined this site 5 years ago.
     
    AModelCat, Jun 14, 2020
    AModelCat, Jun 14, 2020
    #8
    86scotty, Brettj3876, stillwurkin and 4 others Thank this.
  11. Jun 14, 2020 #9
    Deere hunter

    Deere hunter Road Train Member

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    Unscrewing the oil cap will tell you quite a lot, if there’s any milk at the bottom of it or if there’s a puffing sound.
     
    Deere hunter, Jun 14, 2020
    Deere hunter, Jun 14, 2020
    #9
    Edjahman Thanks this.
  12. Jun 14, 2020 #10
    Deere hunter

    Deere hunter Road Train Member

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    Good luck with your new truck I hope it’s a money maker!
     
    Deere hunter, Jun 14, 2020
    Deere hunter, Jun 14, 2020
    #10
    stillwurkin and Edjahman Thank this.
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