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Cummins m11 celect plus with white/gray smoke issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jkc10, Mar 16, 2014.

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  1. Mar 16, 2014 #1
    jkc10

    jkc10 Bobtail Member

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    Hi there, I sure like what I read here from ya'll. I'm hoping I can get some input on an issue with my 1998 Volvo vnl 670 w/ Cummins m11 celect plus that has one and a half million miles, a full rebuild at 850k. Runs great but has developed a white/gray smoking problem with a smell of oil. No coolant lose, no coolant in oil. We go through the standard amount of oil consumption, there is a slight amount of excessive blowby. This happens at operating temp. Most of the smoke is at re-start. I checked the injectors by unplugging them one at a time and they seemed to be functioning. I have changed out the oil cooler and put in a new fuel/water separator and fuel filters recently. Last week I used a synthetic blend when I did an oil change and it helped a bit. Does anyone out there have any suggestions.
     
    jkc10, Mar 16, 2014
    jkc10, Mar 16, 2014
    #1
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  3. Mar 16, 2014 #2
    Heavyd

    Heavyd Road Train Member

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    White gray is usually incomplete/improper combustion of fuel. Usually an injector is leaking fuel into the cylinder or injecting at the wrong time due to an internal problem of the injector. The malfunctioning cylinder usually runs colder than the others. Go to your local hardware or tool store and buy one of those infrared temp guns and measure the exhaust manifold at each cylinder. If you have one that is significantly lower than the rest, it needs further testing. Could be just an injector, or could be something with the cylinder or valves.
     
    Heavyd, Mar 16, 2014
    Heavyd, Mar 16, 2014
    #2
    jkc10 Thanks this.
  4. Mar 16, 2014 #3
    jkc10

    jkc10 Bobtail Member

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    Thank you for helping. Another ? checking injectors by unplugging and listening for engine change, is that a sufficient way to check injectors?
     
    jkc10, Mar 16, 2014
    jkc10, Mar 16, 2014
    #3
  5. Mar 16, 2014 #4
    JohnP3

    JohnP3 Road Train Member

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    I would really like to see you disconnect the injectors on an M11, one at a time, please post the video.
    Possible with an N14, not an M11 please prove me wrong and post the video.
    I would buy a bottle of oil test tracer, P# 3376891 Cummins then check the turbo outlet if wet there remove it and if manifold is wet remove it then you know which cylinder.
    The blow-by and the oil could very well be from the turbo.
    Just a thought!
     
    JohnP3, Mar 16, 2014
    JohnP3, Mar 16, 2014
    #4
  7. Mar 16, 2014 #5
    rebeloutlaw66

    rebeloutlaw66 Light Load Member

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    You can hook it to a computer and do a cylinder cut out, or you can take the valve cover off and start the engine and unplug one at a time, so it can be done
     
    rebeloutlaw66, Mar 16, 2014
    rebeloutlaw66, Mar 16, 2014
    #5
    jkc10 Thanks this.
  8. Mar 17, 2014 #6
    jkc10

    jkc10 Bobtail Member

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    Feb 11, 2013
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    About the Turbo...... On the gage it never goes past 50%, is that standard?
    Where would we look for a computer program to do a cylinder cut out?
    Thanks again for your input!
     
    jkc10, Mar 17, 2014
    jkc10, Mar 17, 2014
    #6
  9. Mar 17, 2014 #7
    rebeloutlaw66

    rebeloutlaw66 Light Load Member

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    A dealer or Cummins shop could do it or some repair shops will have a computer to hook to the ecm, and can tell you everything that engine has done or doing, it can also tell them which injector may be weak
     
    rebeloutlaw66, Mar 17, 2014
    rebeloutlaw66, Mar 17, 2014
    #7
  10. Mar 17, 2014 #8
    jkc10

    jkc10 Bobtail Member

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    o-Kay thanks, that's what I thought you meant, I was hoping there was a program out there for the do it your-selfers! I checked with cummins last week here in the Portland, Oregon area and they will be more than happy to do that for me at $275. to $350. to tell me which injector it may be. I'm just troubleshooting other causes first.
     
    jkc10, Mar 17, 2014
    jkc10, Mar 17, 2014
    #8
  11. Mar 17, 2014 #9
    rebeloutlaw66

    rebeloutlaw66 Light Load Member

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    If there is a small trucking company near you that has there own shop you may check with them and see if they can hook up a computer to it, I've done that before, like on a Saturday when they wasn't really busy, only took about 15 minutes or so to do it, just a thought
     
    rebeloutlaw66, Mar 17, 2014
    rebeloutlaw66, Mar 17, 2014
    #9
  12. Mar 17, 2014 #10
    Heavyd

    Heavyd Road Train Member

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    Just go to any shop about 15 mins before break time and offer to buy a round of coffee for the boys, you'll get almost anything you want!!!
     
    Heavyd, Mar 17, 2014
    Heavyd, Mar 17, 2014
    #10
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