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3406e low oil pressure

Discussion in 'Trucks [ Eighteen Wheelers ]' started by tsmokingun, Apr 30, 2009.

  1. Apr 30, 2009 #1
    tsmokingun

    tsmokingun Bobtail Member

    4
    0
    Apr 30, 2009
    Crescent City, California
    0
    I have a 1994 3406e catapillar eng# 5EK18846
    Oil pressure is usually around 57-60 psi. droped to 31psi. and check eng light and shut down light came on if reved up to 1500rpm. I checked oil pressure on block with manual guage to confirm oil reading and it was 31psi. pulled oil pan and replaced spring and plunger on oil pump. still getting 31psi. pulled valve covers and checked cam bearings and saw no problem with them..did notice that no oil in top of head. pulled oil pan again and replaced entire oil pump looked at oil pickup tubes for cracks holes..nothing wrong. looked at crank/bearings. they looked good. started truck.. still 31psi. truck is not smoking...no water in oil.. no oil in water..no crazy noices..STUMPED. anyone have another idea or have had similar problem.. please help. Thanks Thomas
     
    tsmokingun, Apr 30, 2009
    tsmokingun, Apr 30, 2009
    #1
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  3. Apr 30, 2009 #2
    FYDA FREIGHTLINER CINCY

    FYDA FREIGHTLINER CINCY Light Load Member

    270
    131
    Apr 28, 2009
    Cincinnati, ohio
    0
    does it have a brake saver on it? what kind of engine brake? the oil filter base has 2 bypass valves in the back of it. one of those could be stuck. in between the rocker shafts their are oil gallery plugs, one of those could have come out. we seen this once on a reman head, but it had oil all over the top side.
     
    FYDA FREIGHTLINER CINCY, Apr 30, 2009
    FYDA FREIGHTLINER CINCY, Apr 30, 2009
    #2
  4. Apr 30, 2009 #3
    tsmokingun

    tsmokingun Bobtail Member

    4
    0
    Apr 30, 2009
    Crescent City, California
    0
    I realy don't know much when it comes to working on this truck what I have done is about the extent of my know how... I took truck to a shop this morning but I would still care to hear any advise. so i could relay the info to shop...Thanks
     
    tsmokingun, Apr 30, 2009
    tsmokingun, Apr 30, 2009
    #3
  5. Apr 30, 2009 #4
    112racing

    112racing Road Train Member

    1,384
    20,548
    Nov 30, 2008
    pocono's, pa
    0
    :biggrin_25511:i have a cat 3406e and have not had this problem and i don't know if cat has these but a buddy of mine with a cummins had this happen once there were nozzles that sprayed the bottoms of the pistons with oil to cool them and they were made of plastic or nylon and the end broke off one of them leaving a bigger hole than the nozzle on the end and it made his oil pressure drop much like yours like i said just a thought i don't know if cat has these or not
     
    112racing, Apr 30, 2009
    112racing, Apr 30, 2009
    #4
  7. Apr 30, 2009 #5
    broncrider

    broncrider Road Train Member

    1,618
    3,187
    Mar 23, 2007
    somewhere drinkin beer probaly.....
    0
    ill bet money your main bearings are shot
     
    broncrider, Apr 30, 2009
    broncrider, Apr 30, 2009
    #5
  8. Apr 30, 2009 #6
    tsmokingun

    tsmokingun Bobtail Member

    4
    0
    Apr 30, 2009
    Crescent City, California
    0
    put air to it today and could hear it leaking in block...pulled valve covers off and couldn't find anything on top. going to pull oil pan tomorrow and put air on it again..
    Truck has 947,000 miles..New rod/mains at 904,000 overhead rat at 805,000
     
    tsmokingun, Apr 30, 2009
    tsmokingun, Apr 30, 2009
    #6
  9. May 1, 2009 #7
    Les2

    Les2 Road Train Member

    5,150
    2,288
    Jul 25, 2008
    kicked back in my lazyboy...
    0
    Did you change the oil when you dropped the pan the first time?
     
    Les2, May 1, 2009
    Les2, May 1, 2009
    #7
  10. May 2, 2009 #8
    tsmokingun

    tsmokingun Bobtail Member

    4
    0
    Apr 30, 2009
    Crescent City, California
    0
    yes changed oil first time...pulled oil filter and found nothing in it
     
    tsmokingun, May 2, 2009
    tsmokingun, May 2, 2009
    #8
  11. May 3, 2009 #9
    05chopper

    05chopper Light Load Member

    169
    22
    Dec 25, 2008
    USA
    0
    I assume you used a can cutter to inspect the oil filter? Has this been overhauled lately? Check the oil pressure at the front of the block and compare it with mechanical oil pressure gauge.
     
    05chopper, May 3, 2009
    05chopper, May 3, 2009
    #9
  12. Jan 2, 2015 #10
    sailboatjim

    sailboatjim Light Load Member

    292
    173
    Aug 27, 2014
    Boston, Mass
    0
    Anyone know how this came out?
    It should be a law that if you start a thread with a problem you come back to that thread and close it out. No one learned anything from this. lol
     
    sailboatjim, Jan 2, 2015
    sailboatjim, Jan 2, 2015
    #10
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