How long should a turbo last?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by texasmorrell, Nov 30, 2017.

  1. Joetro

    Joetro Road Train Member

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    I have a Browning A-Bolt rifle that needed work. Being used to Remington, Ruger and other Paul Mauser designs, I wasn't expecting the goofy trigger assembly that I found in the Browning. Weird setup, to be sure. You have to send the assembly to Browning to get it right unless you know what you're doing. I just bought a replacement. I equate these VGTs to that. Making it more complicated doesn't necessarily make it better.
     
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  3. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    I've seen Cummins & Detroit go Vesuvius through the stack. What a nightmare.

    That's why I could see changing one after so many miles, but you might make it worse lol.
     
  4. Joetro

    Joetro Road Train Member

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    Oh, that's just funny, right there. That made me laugh.:laughing-guffaw:
     
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  5. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    The DD Detroit ran simple turbos, and now run asymmetrical turbos in Evolution, and I heard from a mechanic I trust, on all the new ones, they got away from the variable geometry ones.

    Idling up, to keep oil pressure higher, helps.

    I've never had a turbo go, had the plumbing come apart on a 500 series 60 14 liter, but that didn't hurt anything, just got a new clamp to replace the one that broke.

    Early ISX, we had one that was replaced because the turbo failed and burned it up. Those didn't have a vg turbo.
     
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  6. Joetro

    Joetro Road Train Member

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    Yep, but I have to be careful of that since I have an Ultrashift and am not quite sure at what RPM the centrifugal clutch starts to engage. I'm afraid if I set the idle too high, the clutch may start to engage ever so much and I'll wear out the friction material. I like the Ultrashift, but I just don't know enough about the things.
     
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  7. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    I ran one of those with a Mercedes, circa 2005 or 2006, and never had trouble with it, meaning the clutch, the transmission computer and ECM were supposed to modulate engagement, I hated the transmission , but idling wasn't a problem.

    Manual is actually manual overide, and it wouldn't lug for any reason, and to run at a grade, you had to prevent the upshift, that, it would do.

    It also wouldn't downshift at higher than 1250 rpm or therabouts, and missed them on upgrades, no matter what, manual setting or auto. The companion truck put a shaft through the trans case. I was really surprised my ride stayed together.
     
    Last edited: Dec 7, 2017
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  8. Joetro

    Joetro Road Train Member

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    Oh, I know how to run one, I just haven't taken much time to learn about how they operate, which I should. I run mainly Midwest to Northwest and I have no problem with it, aside from the fact that I would like to have more control than it gives me. Still, though, it's been a pretty good transmission. Like I said, it's a few little things that I'm unsure of, like the upping the idle thing.

    So, what you're telling me is that if I'm just bumping the idle up to keep oil to the places oil needs to be (turbo, etc...), the ECM will keep the clutch from trying to engage, so I don't have to worry about that part?
     
  9. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    I asked, and didn't get a good answer, I do know the systems are computer controlled. Meaning, it isn't really a purely centrifugal clutch, and in neutral, the clutch should be engaged, anyway, like in a manual transmission. You have to hit the service brake, and disengage fast idle to put it in gear anyway.

    Cummins recommended 800 rpm idle for ISX, and I believe everyone else but Volvo was recommending 900. Volvo is using the exhaust brake to load the engine to bring temps up at low idle, not sure about oil pressure.

    Check your manuals, or asking someone you trust is what I'd do to be certain of what's the right way to idle an engine with a given transmission.
     
  10. Joetro

    Joetro Road Train Member

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    Okay, thanks for the info. I'm actually waiting for KW to call me back, since I had a couple questions for them after picking my truck up, anyway. I didn't even think about the clutch being fully engaged in neutral as it would with a standard. It is a standard, after all, with the computer doing the shifting.
     
  11. texasmorrell

    texasmorrell Medium Load Member

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    Okay, so opened up the air to air again and there is for sure oil in it now. Not a whole lot but enough to accumulate. Question, how long can I go before I must get the turbo replaced?
     
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