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Thread: Oil pressure

  1. #1

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    I.D.K.?

    Oil pressure

    Rebuilt a 2.6 and truck is running excellent. Having a oil pressure issue with the sending unit I think. At first I put a oil sending unit on for a dash light that did not work with my oil pressure gauge. Sent away for what is supposed to be the proper oil sending unit for a gauge, after installing and starting the engine the gauge needle moves normally but passes mid range on the gauge where it used to be around, continuing all the way right to the end of the gauge and stays there. Any advice. Will check oil pressure with a manual gauge when I get proper fittings.

  2. #2




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    that sounds like an oil pressure switch - grounds out with pressure on it. The sending unit is rather large compared to a pressure switch. That would work kind of for an oil safety pressure switch for an electric fuel pump, except at startup.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    Quote Originally Posted by pennyman1 View Post
    that sounds like an oil pressure switch - grounds out with pressure on it. The sending unit is rather large compared to a pressure switch. That would work kind of for an oil safety pressure switch for an electric fuel pump, except at startup.


    Yes i think i managed to order the wrong one. Sending it back and ordering a

    [top]Engine Oil Pressure Switch-VIN: K Beck/Arnley 201-0551


  4. #4

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    So I installed a proper sending unit and my oil pressure barely moved the needle on my gauge, so on the advice of brother in law the mechanic I bought a mechanical gauge. I just installed it and on start up 80lbs. Fluctuates up to 100psi, in up to fourth gear. Gauge only goes to100lbs so might replace. But is 80lbs good or bad at idle, or a better question is what should idle and operating pressures be? Thanks.

  5. #5

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    I removed the balance shafts in my 2.6. Cold I see 80-100psi at idle. 25 psi at idle when hot (My idle is pretty low) and cruising down the highway at about 2800 rpm I see about 80 psi. It will climb up to about 100 if I let her rev out. I believe the bypass kicks in at 100psi. The rule of thumb I have always known is that you want at least 10psi for every 1K rpm.
    I run 10-30 oil, although last winter I dropped down to 5-30. We had plenty of below 0 deg. F nights, takes an alarming amount of time to build pressure when oil is about as fluid as molasses.

  6. #6

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    can't remember if its all or some year 2.6 starions had an upgraded(forklift?) pump, so they had even more pressure
    To the point where more than a few cars burst aftermarket filters, on cold start. Blew out non-mitsu turbo seals also
    The culprit was a stuck oil pressure relief valve
    eliminating balance shafts increase the pressure even more. Most did

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