Blow by tube mystery liquid

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by God prefers Diesels, Jan 4, 2021.

  1. 6cuda6

    6cuda6 Light Load Member

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    I'm not sure how easy it is to get to the tub but if you suspect it came from there grab a flashlight and shine it up the tub.....if it was an overflow of sorts you should see something left over in there.
    I assume you crawled under the truck and check trans seals. clutch cover etc.....

    You sure it wasn't from the air dryer? Watery oil discharge would make sense......
     
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  3. wichris

    wichris Road Train Member

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    If it has a filter for it, change it. Filter should collect and drain back to the motor. Get's saturated enough and it will drain out.
     
  4. pushbroom

    pushbroom Road Train Member

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    You sure you didn't park over someone else's puddle?
    If it came out the truck something should be wet.
    If you cant find anything take it for a spin then re-inspect.
     
  5. black_dog106

    black_dog106 Road Train Member

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    Worried for you GpD. Ground surrounding "puddle" appears to clean to be a t/s, so hoping your taste sample isn't contaminated with DNA :confused2:
    Seriously, as pushbroom said, maybe you parked on a previous leak. Hate to be reading next weekend...you 'n Hunny doing an inframe. :biggrin_25514::occasion5:
     
    Last edited: Jan 5, 2021
  6. Rideandrepair

    Rideandrepair Road Train Member

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    What is it Detroit or Cummins?
     
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  7. 86scotty

    86scotty Road Train Member

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    CM870, Cummins ISX
     
  8. Rideandrepair

    Rideandrepair Road Train Member

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    Lol, I had to google it.
     
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  9. mpd240

    mpd240 Road Train Member

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    Your not parked at a truck stop are you?
     
  10. Rideandrepair

    Rideandrepair Road Train Member

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    This is definitely a mystery. We have to figure this out. Hmmmm. Looks like new oil, smells and tastes like oil, yet sweet, but not like antifreeze sweet. Maybe sweet light crude. Where did it come from? What is it? Maybe it’s coolant, from Waterpump weep hole, or oil cooler o rings at the block, turned brown from oil residue on the engine. Hard to believe it came from the blow by tube. Maybe it is condensation like someone mentioned. Crazy weather in Texas these days causing it. Maybe got built up in the valve cover screen, along with the oil, and when ran, it somewhat steam cleaned the whole blow by system. We may never know.
     
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  11. AModelCat

    AModelCat Road Train Member

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    Considering OP tasted it I sure hope its not another trucker's puddle! :eek:
     
  12. 86scotty

    86scotty Road Train Member

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    I have tasted many motor vehicle liquids in my time but I would not try this with anything on the pee lot.

    We need an update! Where are you, under the truck? It's Miller time!
     
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