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oil pressure

Discussion in 'Jeep CJ' started by kirby, Feb 6, 2017.

  1. Feb 6, 2017 at 11:47 AM
    #1
    kirby

    kirby [OP] New Member

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    1980 jeep cj5
    what is the normal oil pressure on a 258 six?
     
  2. Feb 6, 2017 at 12:48 PM
    #2
    OFFGRID

    OFFGRID Well-Known Member

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    Peter
    Houston
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    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    That depends on how many oil leaks you have. . . It is normal for the oil pressure to fluctuate. The pump is driven off of the camshaft and therefore as rpms increase so should the oil pressure. At idle mine is very low, and when driving the pressure is higher especially when the engine is cold when the oil is thicker. As long as I see an oil pressure and that it fluctuates with rpm I don't worry too much about it. I have heard that you can approximate it to 10psi to every 1000rpm once you are at normal operating temperature although I'm not sure how accurate this is as I have never tested it. It will be higher at initial start up when the motor oil is cold and thick.
     
    C2T likes this.
  3. Feb 6, 2017 at 4:48 PM
    #3
    C2T

    C2T Well-Known Member

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    Richard
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    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    If you are at about 8-10psi at idle, while warm...and it goes up as the RPM does, you are doing good.
     

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