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Oil Pressure Measurement

Discussion in 'Early CJ-5 and CJ-6 Tech' started by juffer, Aug 15, 2019.

  1. Aug 15, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

    Netherlands
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    May be someone can tell me how to connect a mechanical oil pressure meter to a 225 v6. I have the electrical connector. It seems a big nut ( 26) but maybe there is an other plug to connect with a smaller threath.

    thanks

    Juffer
     

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  2. Aug 15, 2019
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    I don't know the 225, but from here it looks like maybe it is the type of electrical connector that slides on from the side, on to the small center terminal?
     
  3. Aug 15, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

    Netherlands
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    Yes that is right. I disconnected it. But I am not sure if I that is the place to connect an mechanical pressure meter
     
  4. Aug 15, 2019
    sterlclan

    sterlclan Member Sponsor

    exploring the...
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    Yes the sender will thread out it has pipe thread on the end. It will leave a female pipe thread hole in the timing cover to hook the New unit to.
     
  5. Aug 15, 2019
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    Sorry, missed the "mechanical" part. You also can thread in a "T" fitting and keep the option for both types.
     
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  6. Aug 15, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    that's a good idea
     
  7. Aug 15, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    I would imagine oil pressure sending unit thread would be 1/8th inch wouldn't it?
     
  8. Aug 15, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Probably 1/8"-NPT, but I'm not certain about the 225.
     
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  9. Aug 15, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    Good catch Tim, I should have said NPT to eliminate misunderstanding.
     
  10. Aug 15, 2019
    mike starck

    mike starck Member Sponsor 2019 Sponsor

    salem,oregon
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    What I did on my renegade II with the oil pressure gauge but no oil pressure warning light I installed a T fitting where the sender is and added a oil pressure warning sender. Had to unwrap the wire loom and add a second wire for the oil "idiot light" . Now I have both and figure I will see that red light sooner then seeing the gauge change.Good to have both. You would think jeep would have left the oil pressure warning wire and just added the oil pressure gauge wire but that wasn't the case. mike
     
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  11. Aug 15, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    The reason I want to check is that at the cold start the first seconds I hear light knocking. It stops when the Red light goes off. 4-5 seconds. The light never Comes on when running. Also not at very low rpm and hot engine. In my opinion it is not a lifter. Should I Worry about that?
     
  12. Aug 15, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    That is certainly a good reason to know what your actual pressure is. How many miles are on your engine? What weight oil are you using? What is the temperature in the Netherlands?
     
  13. Aug 15, 2019
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    A mechanics stethoscope (or a screwdriver or wooden rod...) can be like magic to find and locate internal engine noises. Just don't stick it in the fan.
     
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  14. Aug 16, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    What miles is difficult to tell. I own it for 10 years now. don't know what others did to the engine. I run 20-w50 mineral oil. Tried different but this goes best. temp here is sea climat 20 degrees celcius.( so not hot) . But I first try to meassure the pressure with a good tool to find out . Is 20 psi normal for stationary?
     
  15. Aug 16, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    20/50 when cold could be the reason for the initial noise on startup, might be too thick to circulate quickly. 20 psi at idle is good for a warmed up engine. Does your engine smoke, or use oil?
     
  16. Aug 16, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    No oil consumption and running perfect and strong. No smoke
     
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  17. Aug 16, 2019
    CJ Joe

    CJ Joe Truckhaven Tough!

    Vista, CA
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    Correct, it is 1/8" NPT. I used a rather long nipple and tee. Top fitting is for the mechanical gauge. The electrical is a pressure switch controlling a solenoid to isolate a second battery.


    [​IMG]
     

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