Excessive oil consumption DDEC IV

Discussion in 'Freightliner Forum' started by McLean Trucking, Jun 11, 2014.

  1. McLean Trucking

    McLean Trucking Bobtail Member

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    Jun 11, 2014
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    Afternoon Guys, my first post here. Have a pre egr DDCEV IV that is using a massive amount of oil, gallon plus per day. All going out the exhaust no leaks, and blow by isn't bad. No way this could be valve guides or a bad turbo right? I bought this motor a couple months ago from a place called Modifed Engine Rebuilders in Ft Lauderdale...claimed the motor was tested and run before it left his shop but its been smoking since day one and has only gotten worse. Should I just brace myself here and expect bad cylinders or is there possibly something else wrong?
     
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  3. freightlinerman

    freightlinerman Road Train Member

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    Try to not put a gallon of oil in, and see what the dipstick reads the next day. Internal issues, you'd usually see blue smoke. More than likely, I would guess turbo. But, I'm no mechanic.
     
  4. ppbr2001

    ppbr2001 Light Load Member

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    Clogged air filter will make em use oil too.
     
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  5. Ezrider_48501

    Ezrider_48501 Road Train Member

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  6. Cowpie1

    Cowpie1 Road Train Member

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    Could be turbo, especially if it is the stock waste gated type. I ditched the waste gate turbo before the factory rebuilt DDEC IV 60 got put into my truck. Put on a Borg Warner 171702 non waste gated variety. I have seen the waste gate ones slobber something fierce at times.
     
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  7. ShakieHead

    ShakieHead Light Load Member

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    I'm no mechanic but these are some things I have learned along the way.

    1. Don't put the gallon of oil in it and run it. I had the same problem, with oil consumption, and I was told by a guy to not put it in and run it an see what it does. Didn't put the gallon in and never went any lower. Apparently some motors don't want that gallon of oil, and burn it off and that's it.

    2. Did the motor come with a ECM. I was told by a dealer that all the tunes for the Detroit's were different due to build specs. If you are using your old ECM on a different motor it could cause problems. Maybe your old motor had larger injectors, or different parameters in it causing the smoke.

    3. Check the pipe between turbo and air charge, see if its full of oil. Bad seals in the turbo would cause it to blow oil out the front side to the air charge cooler.

    4. Try and pay attention to the color of smoke. Its hard from driver seat, but I have been told, Black is excessive fuel, Blueish black/gray is oil, gray/white is coolant.

    5. Go to reputable shop and have them run a oil sample on it. It can tell you any problems that are going on with the motor.

    But I am not a mechanic and these are only opinions, I could be completely wrong
     
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  8. snowwy

    snowwy Road Train Member

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    smoke heavier when climbing hills. oil being sucked in through the valves.

    smoke heaver when going down hills. oil being sucked through piston rings.

    you say blow by is not bad. how bad is not bad. blowby is a sign of worn piston rings.
     
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  9. McLean Trucking

    McLean Trucking Bobtail Member

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    Thanks but I shouldve been more clear, there is blue smoke and a lot of it. I took it to Detroit and they feel the problem is def internal.
     
  10. McLean Trucking

    McLean Trucking Bobtail Member

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    Jun 11, 2014
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    Smoke is heavier on deceleration, but there is always blue smoke. I didn't realize more smoke downhill means rings which is really my gut feeling here anyway. Thanks
     
  11. Cowpie1

    Cowpie1 Road Train Member

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    That would be my guess if blue smoke on deceleration. Rings.
     
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