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Normal Oil pressure Reading??

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Mjd1127, Mar 31, 2015.

  1. Mar 31, 2015 #1
    Mjd1127

    Mjd1127 Bobtail Member

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    Mar 31, 2015
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    We have a peterbilt 387 2009 and with the cummins engine and was wandering what the oil pressure reading should be at when running?? Thanks
     
    Mjd1127, Mar 31, 2015
    Mjd1127, Mar 31, 2015
    #1
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  3. Apr 1, 2015 #2
    xsetra

    xsetra Road Train Member

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    Aug 21, 2011
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    I have a Cummins N14 starting cold about 40. Warm 32 running down road. Sitting, idle 18.
     
    xsetra, Apr 1, 2015
    xsetra, Apr 1, 2015
    #2
    mhyn Thanks this.
  4. Apr 2, 2015 #3
    sailboatjim

    sailboatjim Light Load Member

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    Aug 27, 2014
    Boston, Mass
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    On the coldest of cold days my N14 would run 50 lbs when I cranked it.
    Warm it was always between 30 and 40 running and 15-20 at idle.
    Here's the thing. It was always this way. It never was better and/or never worse. It changed a little with the oil age and that's it.
    I remember reading up on the N14 once and I think it was 8-10 psi was low limit on spec at idle warm.
    The super high oil pressure (muscle bound) cat guys hate the N14 oil pressure but that is the way Cummins designed the N14 engine to run.
    The ISX isn't much different from what I've seen.
     
    sailboatjim, Apr 2, 2015
    sailboatjim, Apr 2, 2015
    #3
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