N14 Goong through turbos

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by truckinhermit, Sep 12, 2021.

  1. truckinhermit

    truckinhermit Bobtail Member

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    Sep 12, 2021
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    Just got this Freightliner with an n14.

    First turbo was shot and massive compression loss.

    Changed out the turbo with an aftermarket turbo how ever it didn't even last 1000 miles without sounding like the fins were hitting the housing. Checked tolerance and sure enough everything was fine but I installed a turbo from fleetpride to see what happens.

    Same noise happened a little while after the first load.

    No restrictions in the oil, oil psi 30-35, no metal found in the first replacement turbo.

    Going to check over the turbo inlet first thing in the morning just to make sure.

    Sounds like the turbo waste gate stays partially open and letting off the throttle sounds like bearings winding down.

    Any help would be appreciated. Thanks!
     
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  3. Ross_Tech

    Ross_Tech Light Load Member

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    Will it make the noise when you let off the throttle while parked, or only under load?
     
    Oxbow Thanks this.
  4. jamespmack

    jamespmack Road Train Member

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    Not aware of a n14 built with a waste gate ever.

    Maybe they did, just never seen or heard of one.

    Was the turbine or compressor side damaged?
     
    BoxCarKidd Thanks this.
  5. DUNE-T

    DUNE-T Road Train Member

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    Get the original HT60 turbo.
     
    jamespmack Thanks this.
  6. jamespmack

    jamespmack Road Train Member

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    X2
     
  7. truckinhermit

    truckinhermit Bobtail Member

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    Sep 12, 2021
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    Only under load. And it slowly gets worse.
     
  8. truckinhermit

    truckinhermit Bobtail Member

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    Sep 12, 2021
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    Neither side seem to be damaged at all. It's starting to happen again throughout the throttle range.
     
  9. truckinhermit

    truckinhermit Bobtail Member

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    Sep 12, 2021
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    That's what I was thinking as well. But I was hoping the one from fleetpride would have been a good idea. Seems like it's not though.
     
  10. Nss

    Nss Light Load Member

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    Jul 5, 2021
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    Does exhaust housing look a normal color on the failef turbos? Does it seem to have normal power or is it lacking. I am thinking of a cac leak or an exhaust restriction issue
     
  11. Nss

    Nss Light Load Member

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    Jul 5, 2021
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    Failed. Sorry i fat fingered it
     
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