1. 1070734

    i have a 1990 yj and she usually idles with about 40 pounds of oil pressure. But when i am driving it buries up past 80. normal or not?[addsig]

  2. #2

    1070736

    what weight oil are you using?[addsig]

  3. 1070740

    10w 40[addsig]

  4. #4

    1070772

    I had the same issue when my 89 was new and dealership replaced sending unit. That's all I can tell you.[addsig]

  5. #5
    Join Date
    Oct 2002
    Location
    East Tennessee
    Posts
    5,149

    1070775

    40 pounds of oil pressure. But when i am driving it buries up past 80
    I have the same deal and as far as I can tell it must be ok, I have had no problems so far. Replaced the sending unit and same deal. High pressure is much better than low I guess. heheheh tug[addsig]

  6. #6

    1070816

    well.. you don't want your crank to me pressurized really... you can blow a freeze plug (softplug... etc..)... it is often the result of a faulty pcv system[addsig]
    93 YJ 4.0
    Spring Over, 33x12.50 Mastercraft Courser M/T, High Flow Exhaust, Diamondplate Rear Bumper, Trimmed Flares, 6\" spotters


    We, the Sovereign People of the Universe, wish to live in peace. We live among you, but we are not of you.

  7. #7
    Join Date
    Oct 2002
    Location
    East Tennessee
    Posts
    5,149

    1070934

    PCV is new crank case breather is new. Still runs high. tug[addsig]

  8. #8

    1070950

    BBJ has a fauly gauge... as soon as he starts it... it pegs full... with occasional drops in the readings[addsig]
    93 YJ 4.0
    Spring Over, 33x12.50 Mastercraft Courser M/T, High Flow Exhaust, Diamondplate Rear Bumper, Trimmed Flares, 6\" spotters


    We, the Sovereign People of the Universe, wish to live in peace. We live among you, but we are not of you.

  9. 1070962

    hey, I have a 89 YJ and it runs about 70 to 80psi when I am driving and 30 to 35psi at idle. I did some research on this because it seemed high, but the manual says the oil pressure is supposed to be 25 to 35psi at idle and 37 to 75psi over 1600 RPM. I hope this helps!![addsig]

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