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F134 Oil Pressure

Discussion in 'Early CJ-5 and CJ-6 Tech' started by gotime, Apr 8, 2019.

  1. Apr 9, 2019
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    I think the guy providing the warranty has the last word, FOS or not.
     
    Jrobz23 likes this.
  2. Apr 9, 2019
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    I submit that if you are going to follow their instructions, and not run a filter with restrictor and the squirter jet on the timing gears, then you should change your oil at least twice a year. Preferably 4 times a year. On the 4 solstice days, because they give you an already set date framework. You need to be changing to winter grade oils and summer grade oils, anyway.
     
  3. Apr 9, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    I do agree with this, and I don't think that not using a filter will be an issue, especially with his limited use.
     
  4. Apr 9, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    I know the timing cover is where the return line from the oil filter goes but I don't remember the cover itself having anything internal of the fitting on the cover, correct? The timing gear jet comes from the front of the block.
     
  5. Apr 9, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    I'm sure that most of us with the canister filters have wiped sludge from the bottom of the canister, which shows that yes, they do work. ;)
     
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  6. Apr 9, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
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    Let's be clear- there's a nozzle that squirts oil on the timing gears that is fed off the oil passage feeding the front main bearing (the little line sticking to the right off the front bearing passage in the pic below)- this was the cause of issues when the orifice was oversized, it did cause low pressure to that bearing.

    The filter is fed from the main gallery, assuming the gallery is a nice clean straight bored hole feeding the filter from here will not affect pressure to the front bearing anymore than it will the others.

    The return from the filter does go into the timing gear cover & it does flow quite a bit of oil onto the gears but there's no nozzle there- I believe it's there as a convenient spot to put a plumbing fitting, not to actually lube the gears.

    [​IMG]
     
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  7. Apr 9, 2019
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    Thank you, Howard. My memory of the layout was a bit fuzzy. But I clearly recall a FSM directive to reduce the timing gear nozzle orifice diameter to improve bearing lubrication.

    The amount of oil passing through the filter is actually restricted by a small hole in the center tube of the canister, I believe. This would also regulate pressure in the main gallery.

    Same principle but I was mixing up the two.
     
  8. Apr 9, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
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    Ideedily Doodily

    [​IMG]
     
  9. Apr 10, 2019
    Rick Whitson

    Rick Whitson Detroit Area Sponsor 2019 Sponsor

    I live South of...
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    This is what I done with my NOS 134 F Military Surplus motor because a friend told me not to put a filter on it they only filter part of the oil anyway. been on since 07, no problems.

    [​IMG]
     
  10. Apr 10, 2019
    Rick Whitson

    Rick Whitson Detroit Area Sponsor 2019 Sponsor

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  11. Apr 10, 2019
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    This.
     
  12. Apr 10, 2019
    70cj5134f

    70cj5134f Member

    East Tn
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    I'll bet they(machine shop) had a couple warranty claims on them ,early on.
    So they decided to run no filter on any?(to cover future problems)
    As far as no filter, any flat 4 vw guys hear, they had a screen, no filter.
    Oil change at 3k miles. They run forever.
    Personally I do recommend running a filter! Wait a few miles, to be sure no warranty claim needed then hook it up? If a bypass filter clogs, it's like no filter anyway!
     
  13. Apr 10, 2019
    gotime

    gotime Sick with the car bug

    Minneapolis,...
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    I knew my simple question would start a big hubbub :whistle: At least I know my oil pressure is good. The only reason I brought up that part is I wasn't sure if that would affect the pressure some.

    I don't drive my jeep that much, 500 miles a year or something so far and only in the summer. Since it's been restored, it's not driven that much. I'm working up to driving more, just working out all the kinks. But even then it won't be that much.
     
  14. Apr 10, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    Well, it's good that you did ask that question about your oil pressure, and mentioned the "no" oil filter reasoning. Things like this need to be discussed. Did you happen to find out any more info?
     
  15. Apr 11, 2019
    Mcruff

    Mcruff Earlycj5 Machinist Sponsor

    Albertville, AL
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    When did you have this engine rebuilt? Everything on the web said Northstar Willy’s is closed up permanently. No website, twitter and Facebook pages haven’t been touched in several years.
     
  16. Apr 11, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    Well, I guess the warranty is irrelevant now. :confused:
     
  17. Apr 11, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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    (ducking)

    Probably too many warranty claims on rebuilt engine run without an oil filter :whistle:
     
    Last edited: Apr 11, 2019
  18. Apr 11, 2019
    gotime

    gotime Sick with the car bug

    Minneapolis,...
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    The engine was rebuild in 08 so the warranty is done now. I was more concerned about any damage to the bearings. I talked to both Midwest Military and Walcks. Both said they run filters and don't have issues. I think I'll install a filter and see what my oil pressure does.
     
  19. Apr 11, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    The one thing you can do to "help" eliminate any concern about bearing damage is to install the cartridge and then fill the canister with oil before starting the engine. That way the normal restriction will already be there.
     
  20. Apr 11, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
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    :ninja:

    I've never run a filter on mine. Just a magnetic drain plug.
     
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