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12.7 Detroit leaking oil from blow by tube

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Killinmiles93, Oct 1, 2018.

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  1. Oct 1, 2018 #1
    Killinmiles93

    Killinmiles93 Bobtail Member

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    Motor is leaking oil from blow by tube and inlet for blow by tube along with a new oil leak from valve cover on front portion of valve cover to the middle section on passenger side, please help!
     
    Killinmiles93, Oct 1, 2018
    Killinmiles93, Oct 1, 2018
    #1
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  3. Oct 1, 2018 #2
    Oldironfan

    Oldironfan Road Train Member

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    Check the crank breather filter. Under the valve cover for plugged up, or tube for restriction.
    Otherwise engine is tired.
     
    Oldironfan, Oct 1, 2018
    Oldironfan, Oct 1, 2018
    #2
    Mississippi129 and Killinmiles93 Thank this.
  4. Oct 1, 2018 #3
    Killinmiles93

    Killinmiles93 Bobtail Member

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    Any way it could be coming from air compressor or turbo?
     
    Killinmiles93, Oct 1, 2018
    Killinmiles93, Oct 1, 2018
    #3
  5. Oct 1, 2018 #4
    Oldironfan

    Oldironfan Road Train Member

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    That I have heard. Are you using oil a lot?
     
    Oldironfan, Oct 1, 2018
    Oldironfan, Oct 1, 2018
    #4
    Killinmiles93 Thanks this.
  7. Oct 1, 2018 #5
    Killinmiles93

    Killinmiles93 Bobtail Member

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    No it’s not consuming any oil I’m right at my interval to get an oil change (10000) miles and it’s a hair below the full line, which is from the oil leak.
     
    Killinmiles93, Oct 1, 2018
    Killinmiles93, Oct 1, 2018
    #5
  8. Oct 1, 2018 #6
    Killinmiles93

    Killinmiles93 Bobtail Member

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    Can the extra crank case pressure from what ever it is that’s causing it, damage the motor? I’m 300 miles from the nearest freightliner dealer with a dyno so I can do a blow by test and weed out what it is
     
    Killinmiles93, Oct 1, 2018
    Killinmiles93, Oct 1, 2018
    #6
    Oldironfan Thanks this.
  9. Oct 1, 2018 #7
    sealevel

    sealevel Road Train Member

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    Fix your valve cover leak when you have the time. Detroit's love to smoke through the tube. Your oil consumption is near zero especially with the newer oils. If it ain't broke don't fix it.
     
    sealevel, Oct 1, 2018
    sealevel, Oct 1, 2018
    #7
    Mississippi129 and Killinmiles93 Thank this.
  10. Oct 1, 2018 #8
    Killinmiles93

    Killinmiles93 Bobtail Member

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    Dec 13, 2017
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    The valve cover leak is due to excessive crank case pressure, trying to narrow down why. And I know they like to smoke but it’s blowing oil threw the tube along with the smoke . Believe me I don’t want to have to fix anything that’s not needing of it but I also don’t want every gasket on my motor to leak because of the abnormal pressure
     
    Killinmiles93, Oct 1, 2018
    Killinmiles93, Oct 1, 2018
    #8
    sealevel Thanks this.
  11. Oct 1, 2018 #9
    sealevel

    sealevel Road Train Member

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    Man, don't go to Freightliner. Where are you?Maybe some members here could hook you up with a good local shop.
     
    sealevel, Oct 1, 2018
    sealevel, Oct 1, 2018
    #9
    Mississippi129, Killinmiles93 and Oldironfan Thank this.
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