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Sludge in the blowby

Discussion in 'Ask An Owner Operator' started by DT Trucker, May 9, 2025.

  1. May 9, 2025 #1
    DT Trucker

    DT Trucker Bobtail Member

    4
    2
    Feb 5, 2022
    0
    I noticed this sludge in the oil tube and blowby tube, should i be worried?
    Cat c12
    670k after overhaul
    Little blowby
    No smoke whatsoever


    Thanks in advance
     

    Attached Files:

    Last edited: May 9, 2025
    DT Trucker, May 9, 2025
    DT Trucker, May 9, 2025
    #1
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  3. May 9, 2025 #2
    Spyro2112

    Spyro2112 Medium Load Member

    604
    416
    Mar 17, 2018
    0
    Water in oil. Smell it
     
    Spyro2112, May 9, 2025
    Spyro2112, May 9, 2025
    #2
    Rideandrepair and DT Trucker Thank this.
  4. May 9, 2025 #3
    Jordonh

    Jordonh Light Load Member

    52
    37
    Jul 1, 2022
    North Carolina
    0
    When my E model starting having that, I was getting coolant mixing with my oil had the same sludge as showed in the picture but it was a little more thick then yours though. Pull a valve cover and make sure there is no sludge there.
     
    Jordonh, May 9, 2025
    Jordonh, May 9, 2025
    #3
    Rideandrepair and DT Trucker Thank this.
  5. May 9, 2025 #4
    DT Trucker

    DT Trucker Bobtail Member

    4
    2
    Feb 5, 2022
    0
    Definitely coolant in oil, coolant level was very low. Was it a cracked head in your truck or smth else?
     
    DT Trucker, May 9, 2025
    DT Trucker, May 9, 2025
    #4
    Rideandrepair Thanks this.
  7. May 9, 2025 #5
    wore out

    wore out Numbered Classic

    15,846
    191,684
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    Could be anything right down to a bad water pump. Pull the oil pan and pressurize coolant system, that’s the only way to know for sure where it’s coming from.



    Or you can poke and hope firing the parts cannon
     
    wore out, May 9, 2025
    wore out, May 9, 2025
    #5
    Banker, Oxbow, Rideandrepair and 5 others Thank this.
  8. May 9, 2025 #6
    Magoo1968

    Magoo1968 Road Train Member

    2,032
    5,426
    Mar 18, 2021
    St Malo mb
    0
    Do you use any oil additives? In a c12 I ran 5 years ago I added some Lucas and had more blowby and some sludge . Next oil change didn’t add any and it went back to normal.
     
    Magoo1968, May 9, 2025
    Magoo1968, May 9, 2025
    #6
    Oxbow and Rideandrepair Thank this.
  9. May 9, 2025 #7
    Jordonh

    Jordonh Light Load Member

    52
    37
    Jul 1, 2022
    North Carolina
    0
    It was a leaking liner for me all of them had some very bad cavitation head wasn’t cracked which I was surprised so I rebuilt it for another use only.
     
    Jordonh, May 9, 2025
    Jordonh, May 9, 2025
    #7
    Oxbow, DT Trucker and Magoo1968 Thank this.
  10. May 11, 2025 #8
    77fib77

    77fib77 Road Train Member

    10,486
    65,523
    Jul 7, 2010
    St Louis
    0
    Air compressor?
     
    77fib77, May 11, 2025
    77fib77, May 11, 2025
    #8
    DT Trucker Thanks this.
  11. May 11, 2025 #9
    DT Trucker

    DT Trucker Bobtail Member

    4
    2
    Feb 5, 2022
    0
    Yes i usually put 16 fl oz of Energy Release anti friction metal conditioner but i've been using that for years.
     
    DT Trucker, May 11, 2025
    DT Trucker, May 11, 2025
    #9
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