2004 isx egr cm870 Cummins oil pressure low

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Isel1974, May 11, 2019.

  1. May 11, 2019 #1
    Isel1974

    Isel1974 Bobtail Member

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    May 11, 2019
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    hello
    Cummins 2004 isx egr cm870

    New oil pump, oil pressure sensor, bearings and cranks bearings

    The oil pressure go down and I get a warning light to stop engine

    What can be happen?
     
    Isel1974, May 11, 2019
    Isel1974, May 11, 2019
    #1
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  3. May 11, 2019 #2
    bzinger

    bzinger Road Train Member

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    Are you at or around 25k on the oil ..
    These things are famous for soot plugging the oil filter .
     
    bzinger, May 11, 2019
    bzinger, May 11, 2019
    #2
  4. May 12, 2019 #3
    Isel1974

    Isel1974 Bobtail Member

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    May 11, 2019
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    Thanks for the answer

    Not I’m not. It happens between 5-7k miles after oil change
     
    Isel1974, May 12, 2019
    Isel1974, May 12, 2019
    #3
  5. May 12, 2019 #4
    Goodysnap

    Goodysnap Road Train Member

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    That engine is also common for spinning camshaft bearings at higher mileage. Pull the valve cover and inspect the top end. If you have too, run it with the cover off and check for excess oil return from all components.

    Cut open an old filter, any metal?
     
    Last edited: May 12, 2019
    Goodysnap, May 12, 2019
    Goodysnap, May 12, 2019
    #4
    dustinbrock and spsauerland Thank this.
  7. May 18, 2019 #5
    dustinbrock

    dustinbrock Road Train Member

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    Agreed, I'm guessing you either spun a camshaft bearing or the oil bypass relief valve is shot.

    Cummins has a TSB on the relief valves.
     
    dustinbrock, May 18, 2019
    dustinbrock, May 18, 2019
    #5
  8. May 19, 2019 #6
    baha

    baha Road Train Member

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    Have you replaced the oil cooler yet?
     
    baha, May 19, 2019
    baha, May 19, 2019
    #6
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