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Over haul oil pressure

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Highwolf89, Aug 4, 2015.

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  1. Aug 4, 2015 #1
    Highwolf89

    Highwolf89 Light Load Member

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    I just did my full over haul new oil pump and I raised my rpm to 700 my idle oil pressure is 22 psi.. I called cat went through all the check list with the head mechanic everything checks out. But still oil psi is low for some reason. Mechanic says there is no two engines the same when it comes to these cats... I am wondering if this is true is this okay.. Running psi is at 60. Before overhaul my psi was about the same at idle... Could it be a bad atmospheric pressure sensor ? Would that cause a low reading? Have all my friends yelling at me that's low numbers for cat in terms of psi.. Just so very confused on this matter and cat tells me it's within spec so it's fine... Plz help..

    Thank you
     
    Highwolf89, Aug 4, 2015
    Highwolf89, Aug 4, 2015
    #1
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  3. Aug 4, 2015 #2
    04 LowMax

    04 LowMax Medium Load Member

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    Mine was at 60lbs at idle after full overhaul and 80 at working rpms. Afraid I can't help you as to likely cause, but I know you will get some helpful suggestions on this.
     
    04 LowMax, Aug 4, 2015
    04 LowMax, Aug 4, 2015
    #2
  4. Aug 4, 2015 #3
    Heavyd

    Heavyd Road Train Member

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    Ok, first how are you measuring the pressure? Always double check and confirm oil pressure with a manual gauge taped into an oil galley. Also, what did you do with your "full over haul"? A quick part to replace would be the oil pressure regulator and oil pressure relief valve.
     
    Heavyd, Aug 4, 2015
    Heavyd, Aug 4, 2015
    #3
    tony97905, MJ1657 and GrapeApe Thank this.
  5. Aug 4, 2015 #4
    Highwolf89

    Highwolf89 Light Load Member

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    I did the full overhaul cat gold kit
     
    Highwolf89, Aug 4, 2015
    Highwolf89, Aug 4, 2015
    #4
  7. Aug 4, 2015 #5
    GrapeApe

    GrapeApe Road Train Member

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    I agree with Heavyd. I have seen many Cat oil pressure relief valves stick and cause low oil pressure. This was a huge issue for us on the C13's in 2004-2005. When you pull it out, look close to see if the housing has any scoring.
     
    GrapeApe, Aug 4, 2015
    GrapeApe, Aug 4, 2015
    #5
  8. Aug 4, 2015 #6
    Highwolf89

    Highwolf89 Light Load Member

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    Where would I find this pressure relief valve ?
     
    Highwolf89, Aug 4, 2015
    Highwolf89, Aug 4, 2015
    #6
  9. Aug 4, 2015 #7
    Highwolf89

    Highwolf89 Light Load Member

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    Cat 3406e 1995
     
    Highwolf89, Aug 4, 2015
    Highwolf89, Aug 4, 2015
    #7
  10. Aug 4, 2015 #8
    GrapeApe

    GrapeApe Road Train Member

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    GrapeApe, Aug 4, 2015
    GrapeApe, Aug 4, 2015
    #8
    MJ1657, bigguns and Heavyd Thank this.
  11. Aug 4, 2015 #9
    Highwolf89

    Highwolf89 Light Load Member

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    Is that something I should replace or take out and clean ?
     
    Highwolf89, Aug 4, 2015
    Highwolf89, Aug 4, 2015
    #9
  12. Aug 5, 2015 #10
    GrapeApe

    GrapeApe Road Train Member

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    I'd just replace it, you can see if it's scored and feel if it moves free, but you wont be able to check if the spring is the correct tension.
     
    GrapeApe, Aug 5, 2015
    GrapeApe, Aug 5, 2015
    #10
    Highwolf89 Thanks this.
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