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Oil Pressure Fluctuations

Discussion in 'Early CJ5 and CJ6 Tech' started by jjones415, Jan 4, 2007.

  1. Jan 4, 2007
    jjones415

    jjones415 Jeff Jones

    Hendersonville, NC
    Joined:
    Jul 2, 2006
    Messages:
    13
    Since I changed the oil in my Jeep ('70 CJ-5 w/ 225 V-6), the oil pressure has varied from 40 (idle and low rpm) up to 50 (higher rpm), and I noticed today that it is getting down to about 35 at idle. Before I changed the oil, I don't remember it ever changing from 40. I'm pretty sure it had conventional oil in it from the previous owner, and I used a synthetic blend. Does anyone think that this is something I should be concerned about?
     
    jjones415, Jan 4, 2007
    #1
  2. Jan 4, 2007
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Oil pressure sounds great for a :v6:, what's to worry about. :)

    Gage movement is completely normal as the oil warms up.
     
    sparky, Jan 4, 2007
    #2
  3. Jan 4, 2007
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,381
    I would have been more worried about the pressure never changing.
     
    Glenn, Jan 4, 2007
    #3
  4. Jan 4, 2007
    trickpatrick

    trickpatrick Done? LOL

    North Idaho USA
    Joined:
    Nov 29, 2006
    Messages:
    838
    Steady is not normal.
    Flucuating is.
    Simple oil change and you fixed something:)
    Wish it was all so easy.
     
    trickpatrick, Jan 4, 2007
    #4
  5. Jan 6, 2007
    jeepen

    jeepen Member

    Spokane WA
    Joined:
    Dec 8, 2006
    Messages:
    110
    Good rule of thumb for all motors.
     
    jeepen, Jan 6, 2007
    #5
  6. Jan 6, 2007
    gopher_6_9

    gopher_6_9 Member

    Lawrenceburg, tn
    Joined:
    Dec 17, 2006
    Messages:
    52
    10LBS of pressure for every 1000 rpms, is an old saying and is defiantly good, especially on a fresh motor, however on a street drivin vehicle with a worn motor you will not always see than and will still be fine. Don't get me wrong the motor isn't in perfect shape is you don't see that, but don't say oh I hit 5000rpm yesterday and only had 40 lbs of pressure lets rebuild the engine. as long as I see 10-15 at idle and around 20 at cruising speed I don't even start to think about it
     
    gopher_6_9, Jan 6, 2007
    #6
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