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2003 F150 4.6L Oil pressure

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  • #987231
    Ruban OrtizRuban Ortiz
    Participant

      Losing oil pressure when at idle, revs go above about 1000 rpm, the need goes back to normal. Motor was rebuilt less than a year ago, pressure sensor has been changed, new oil pump during rebuild, hooked oil pressure gauge to it and was reading about 10 psi at 700 rpm. Only loses pressure when engine is at operating temperature. I don’t know what else to do

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    • #987232
      Nightflyr *Richard Kirshy
      Participant

        My first guess is some issue with the clearances of the bearings used for the rebuild.

        #987233
        Ruban OrtizRuban Ortiz
        Participant

          Yeah unfortunately that’s what I’m thinking. The place that did it, I’m pretty sure, rushed the hell out of it and didn’t seem like they knew what they were doing. They had to actually rebuild it twice because after six months or so, the thrust washers failed and were in the oil pan so it wouldn’t surprise me that they installed something wrong. Unfortunately I’m out of warranty and when I called them they basically told me to screw off. Should I just run the engine till it blows because that about where I’m at with it.

          #987234
          Nightflyr *Richard Kirshy
          Participant

            Unless you think a 3rd rebuild is worth the cost and effort….
            Have you tried sourcing a used engine replacement?

            #987235
            Ruban OrtizRuban Ortiz
            Participant

              No I haven’t really looked into it yet but I’m getting to the point where im going to. Either way I’ll be doing all the work myself this time, don’t wanna risk a shop messing it up and I’m out even more money. I’ll probably wait for the motor to fail then I’ll tear it apart and see if the block and heads are good. If they are I’ll just do a rebuild, if not I’ll swap motors.

              #987236
              Nightflyr *Richard Kirshy
              Participant

                Best of luck !!

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