When to overhaul

Discussion in 'Ask An Owner Operator' started by Pancho_24, Mar 6, 2025.

  1. Pancho_24

    Pancho_24 Bobtail Member

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    Apr 5, 2018
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    So about 10 years ago we bought a ‘98 379 with a 3406e 6ts with no maintenance history. I’ve put about 1.1mil on it since then.

    We’ve never opened up the engine with the exception of some camshaft work a few years ago. The head is not the original since it was missing the yellow paint when we bought it.

    I send in oil samples every 20k miles when I change the oil and so far they’re coming back normal.

    My question; do I keep trucking until I notice something off/starts giving troubles or is it almost time for an overhaul with the current (confirmed) miles?
     
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  3. abyliks

    abyliks Road Train Member

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    It’s almost time, but until it starts using a gallon+ a day keep on trucking, unless you have a good year and are looking to spend a little something at the end to knock uncles Sam’s take down
     
    Ssgtkevin, Siinman, Opendeckin and 3 others Thank this.
  4. Pancho_24

    Pancho_24 Bobtail Member

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    10-4 Thank you for your reply
     
  5. Judge

    Judge Road Train Member

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    If you wanna spend money just do
    rods+mains
    (everything but crank and cam)
     
    Opendeckin Thanks this.
  6. DUNE-T

    DUNE-T Road Train Member

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    One of my N14's has been consuming a gallon of oil per week for the last 3 years. I say keep driving until it starts giving you problems
     
  7. bad-luck

    bad-luck Road Train Member

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    Have you had the rods and mains done?
     
  8. MTMAUS

    MTMAUS Light Load Member

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    I dont know much about that motor, but unless there is some hard actual known things you need to replace at a certain time etc, I aint stuffing around with a good motor, keep oil samples going and just keep trucking
     
    Opendeckin Thanks this.
  9. wore out

    wore out Numbered Classic

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    CHASIN THE DEVIL'S HERD
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    I’d leave it be till it gave problems, I have 2 in the shop right now that we’re took some place for an ounce of prevention……..it’s gonna take 10 lbs of cure to get em back right
     
    Siinman Thanks this.
  10. Pancho_24

    Pancho_24 Bobtail Member

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    Apr 5, 2018
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    Well that eases my mind! Thanks for all the input
     
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