Low Oil Pressure???

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Phoenix Heavy Haul, Jul 25, 2022.

  1. Phoenix Heavy Haul

    Phoenix Heavy Haul Light Load Member

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    Today I was trucking along and my #### CEL came on and lil red light in the oil gauge.
    Pressure was under 40 and wouldn’t rise normally stays around 50.
    Pull over shut it down, I was about half a gallon low.
    Noticed I had smoke coming from the filler tube (which I’ve never had) I assumed engine oil temp had gotten hot.
    Nevertheless when I start it it takes about 5-10 secs before gauge registers pressure. At idle it maintains roughly 15psi when I take off it does fine goes up past 50 like normal as I shift and then rest around 45. The weird thing is the longer I drive the more it drops closer to 40 and dipped right under 40 on my 20 mile drive to the loves.
    I haven’t noticed any drop in power etc.
    And I’ve read that apparently Detriot has seals that go out in the oil tubes in the pan which creates a loss in pressure.
    It’s a DD16 with 450k on it. Any ideas or advice?
     
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  3. Brandt

    Brandt Road Train Member

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    Could be the oil pickup tube seals. This guy seem to have quick video first thing he say the seal on pickup tube go bad at about 500k on DD15

     
  4. Phoenix Heavy Haul

    Phoenix Heavy Haul Light Load Member

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    Yeah I think that maybe the culprit. Thanks for the video!
     
  5. slow pok

    slow pok Light Load Member

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    Oct 27, 2013
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    Mains are fixing to go out
     
  6. Chieftains

    Chieftains Medium Load Member

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    Let us know what it was if you fix it.
     
  7. Phoenix Heavy Haul

    Phoenix Heavy Haul Light Load Member

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    Yep I believe she is ####ed!
    Had to add a gallon of coolant this morning,
    Oil on dipstick is now overfull (no milky)
    And oil pressure is idling at 45-50psi.
    Gonna try to get
    This get this load off and get it to shop.
     
  8. 062

    062 Road Train Member

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    Could be fuel dilution. If you can’t smell it, then take a sheet of white paper and put a few drops on it. Fuel will make sort of a halo around the oil.
     
  9. Phoenix Heavy Haul

    Phoenix Heavy Haul Light Load Member

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    Thanks I tried that and looks normal. Not sure how fast speedco can do an oil analysis but may try to stop and get oil changed and analyzed
     
  10. Phoenix Heavy Haul

    Phoenix Heavy Haul Light Load Member

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    Feb 8, 2022
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    DBA31442-62ED-4A81-92BC-3F66AA424A42.jpeg View attachment 421227
    So I just grabbed my clipboard from earlier where I applied the oil drops. And it appears to be a Halo…rekon it needed time to dry…..check out pic.
     
  11. LoneRanger

    LoneRanger Road Train Member

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    @Phoenix Heavy Haul


    What year is your dd16?

    also if it’s consuming oil, the pickup tube orings won’t be the cause. But it’s still a good idea to change it when opening it up.

    do you have my type of gauges ? If yes you can upgrade the cluster to include the turbo and engine oil temp as well. Its an easy bolt on.
     
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