Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › expexted oil Pressure

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  • October 9, 2017 at 12:19 pm #23703

    Michael Black
    Participant
    Vessel Name: finatic
    Engines: 6BTA
    Location: HONOLULU
    Country: USA

    I have twin 6BTA 5.9 Mk3 370 hp diamond series CPL 2208 motors the two oil pressure gauges read vastly different. I presume just a gauge anomaly, but the question what should I expect for oil pressure at 1500 or so RPM?

    thanks in advance

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  • September 12, 2018 at 5:27 pm #37097

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Gauge could have been sticking??

    Does it matter? NO..

    You are on the high side of the spec.

    They are many (MOST) that would prefer that than the other way around

    Tony

    September 11, 2018 at 10:02 pm #37066

    peteracurtis
    Participant

    High oil pressure

    I had a sudden increase in oil pressure on my port 6BTA5.9 370hp engine. I’ve changed sender, changed filter, renewed pressure regulator, even renewed cooler housing, no change. Also ran up with a mech gauge fitted which verified the pressure. How can this be? Is it possible my gauge was reading low before and something happened there?

    My pressure now, verified by mech gauge, running warm, is around 75psi at 2000 rpm, 72 at 1800 and drops to 30 at 600. It seems to jump when I get up to 1000rpm.

    Oils sample lab reports are good. Cut open the old oil filter and clean.

    I’m stumped!

    1 user thanked author for this post.
    RiggersandFinsBda
    October 10, 2017 at 6:13 pm #23755

    gary c watkins
    Participant
    Vessel Name: Prime Interest II
    Engines: 370 2016 Cummins
    Location: On the waterway
    Country: US

    Primeinterest II

    I had varying oil pressure readings from one 5.9 to the other,from pilot house to fly bridge also. I eliminated the problem by standardizing the resistance reading between the different senders. 2001, 4788 Bayliner w/2016 370’s

    October 9, 2017 at 7:30 pm #23721

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Use your Electrical Analog Gauges more as indicator more than than absolute number.. If you want an accurate numbers, then you need to install a high quality mechanical test gauge to see what things really are……….

    As to what you should see or what is normal when up to operating temp ( 160-190F)……..Idle, 5-15 PSI, cruise at 1500, maybe 25-40, high cruise , maybe 30-60 PSI..

    Anything within these ranges is 100% normal and within the engine specs.

    Tony

    October 9, 2017 at 2:10 pm #23708

    Bill Desmarais
    Moderator
    Vessel Name: Extremist
    Engines: Cummins 6BTA 370
    Location: Portsmouth, NH
    Country: United States

    WOT 3100

    October 9, 2017 at 2:06 pm #23706

    Bill Desmarais
    Moderator
    Vessel Name: Extremist
    Engines: Cummins 6BTA 370
    Location: Portsmouth, NH
    Country: United States

    Mike,

    I have the same 370 with 180 hours on it. Bought it as a new ReCon from Tony here on the forum.

    I run 13 qts. in the oil pan. Wolverine oil pan heater on so engine oil is always warm at a cold start.

    The engine also has a 160F Tstat in place of the factory 180F.

    Here’s a pic of the gauge panel running @ 2600 rpm. Oil pressure ? 60-65 psi ??

    @ 800 rpm +- the needle will be between 0 psi and the first hash mark. 20 psi maybe ?

    Hope this helps you ?

    Regards, Bill D

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