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1989 5.7 omc oil pressure parameters-gctid394386

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    1989 5.7 omc oil pressure parameters-gctid394386

    Does anyone know what the high and lowend oil pressure readings should be for a 1989 5.7 OMC cobra..Im getting 45psi after start up, 30 psi at cruise and around 10 at idle...what should they be? Thanks

    #2
    What you have is acceptable. I would take off the sender and clean it out or install a new one and try it again. Clean up the connections also on the sender and the ones on the gauge. Post back if there is a change.

    Maybe you should tee in a manual gauge.

    What oil weight wise are you using ? 30 straight is what i use.
    Be good, be happy, for tomorrow is promised to no man !

    1994 2452, 5.0l, Alpha gen. 2 drive. Sold ! Sold ! Sold !

    '86 / 19' Citation cuddy, Merc. 3.0L / 140 hp 86' , stringer drive. Sold ! Sold ! Sold !

    Manalapan N.J

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      #3
      Will do..Probably does need a cleaning....you think the reading are within limits from the factory? I also use straight 30 weight heavy duty from castrol..which is reccommend from the manufacturer...let me know what you think and Ill clean the connections and sending unit tomorrow and post the results.

      Chris

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        #4
        You don't think that engine will be in factory new spec's do you ? Post back after you tee in a manual gauge and run it a bit.

        Many more great mechanical minds here then mine, they will chip in after you post back i'm sure.
        Be good, be happy, for tomorrow is promised to no man !

        1994 2452, 5.0l, Alpha gen. 2 drive. Sold ! Sold ! Sold !

        '86 / 19' Citation cuddy, Merc. 3.0L / 140 hp 86' , stringer drive. Sold ! Sold ! Sold !

        Manalapan N.J

        Comment


          #5
          Chief Alen wrote:
          You don't think that engine will be in factory new spec's do you ? Post back after you tee in a manual gauge and run it a bit.

          Many more great mechanical minds here then mine, they will chip in after you post back i'm sure.
          Chief Alen is right. A good mechanical gauge will tell the truth. Griff

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