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Help... no oil pressure on Cummins ISX 15

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by GatorKenworth001, Dec 5, 2019.

Page 3 of 4
  1. Dec 7, 2019 #21
    GatorKenworth001

    GatorKenworth001 Bobtail Member

    23
    7
    Jun 9, 2013
    0
    Yes sir, that’s the plan on Monday. Plus, if the filter is totally clogged, it does have a filter bypass valve. We checked it. It seemed in good working order and was clean.
     
    GatorKenworth001, Dec 7, 2019
    GatorKenworth001, Dec 7, 2019
    #21
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  3. Dec 7, 2019 #22
    sledhoz1

    sledhoz1 Bobtail Member

    2
    1
    Dec 29, 2016
    WI
    0
    Hey, the pickup tube cracks where soldered, seen this enough. Forget about the relief valves, misc, etc...
    Drop the pan and inspect the pu tube. Times a wasting, no roll-no mula !!
    ....
     
    sledhoz1, Dec 7, 2019
    sledhoz1, Dec 7, 2019
    #22
  4. Dec 7, 2019 #23
    Snailexpress

    Snailexpress Road Train Member

    2,654
    6,034
    Apr 28, 2014
    Rocky
    0
    Bet your engine is anchor now. You said mains were done 138K ago. Someone did something wrong. It start develop oil pressure drop. The final straw was dry start after oil filter change. Look for bearings out on the bottom or overhead.
     
    Snailexpress, Dec 7, 2019
    Snailexpress, Dec 7, 2019
    #23
  5. Dec 10, 2019 #24
    GatorKenworth001

    GatorKenworth001 Bobtail Member

    23
    7
    Jun 9, 2013
    0
    Well, pan is off. Pressure relief valve is jammed slap all the way up inside pump and will not come out for nothing. Replacing with brand new oil pump and new pickup tube also.
    Will update tomorrow
     
    GatorKenworth001, Dec 10, 2019
    GatorKenworth001, Dec 10, 2019
    #24
  7. Dec 10, 2019 #25
    pushbroom

    pushbroom Road Train Member

    1,769
    7,204
    Sep 1, 2012
    0
    No other shrapnel in the pan? That is usually what jams the regulator in the pump
     
    pushbroom, Dec 10, 2019
    pushbroom, Dec 10, 2019
    #25
  8. Dec 10, 2019 #26
    GatorKenworth001

    GatorKenworth001 Bobtail Member

    23
    7
    Jun 9, 2013
    0
    None reported.
     
    GatorKenworth001, Dec 10, 2019
    GatorKenworth001, Dec 10, 2019
    #26
  9. Dec 10, 2019 #27
    Mattmanstroked

    Mattmanstroked Light Load Member

    185
    277
    Nov 24, 2019
    0
    Any thoughts on pulling a rod and main bearing cap to check bearings and crankshaft.
     
    Mattmanstroked, Dec 10, 2019
    Mattmanstroked, Dec 10, 2019
    #27
  10. Dec 10, 2019 #28
    GatorKenworth001

    GatorKenworth001 Bobtail Member

    23
    7
    Jun 9, 2013
    0
    They checked #1 and 4. Said they looked clean. No unusual wear. Saying everything on top end looks clean too. I have to admit, this time around, for a Cummins it idles real smooth and quiet. Almost as quiet as a paccar.
     
    GatorKenworth001, Dec 10, 2019
    GatorKenworth001, Dec 10, 2019
    #28
    Mattmanstroked Thanks this.
  11. Dec 13, 2019 #29
    GatorKenworth001

    GatorKenworth001 Bobtail Member

    23
    7
    Jun 9, 2013
    0
    Replaced with brand new oil pump. New oil and filter. Engine is running great. Oil pressure @ 675 rpms is 25 psi, running down the highway @1400 rpms 35 psi. Running smooth and nice. Keeping my fingers and toes crossed.
     
    GatorKenworth001, Dec 13, 2019
    GatorKenworth001, Dec 13, 2019
    #29
    bzinger, Mattmanstroked and Roberts450 Thank this.
  12. Dec 13, 2019 #30
    Goodysnap

    Goodysnap Road Train Member

    3,502
    8,382
    Jul 12, 2017
    0
    Hope your shop shimmed the pump gear lash. I'd be taking the old one apart to find out what happened.
     
    Goodysnap, Dec 13, 2019
    Goodysnap, Dec 13, 2019
    #30
    spsauerland Thanks this.
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