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Pin hole in oil pan

Discussion in 'Early CJ5 and CJ6 Tech' started by Johns1967CJ5, Dec 27, 2015.

  1. Dec 27, 2015
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    Although my first start up went well I noticed I have a drip from the side of the oil pan, on the starter side, about 2" down from the block. There is a pin hole probably from sand blasting it. I cant locate a good used one so was thinking of draining the oil and trying to spot weld the hole quickly without burning thru. I have a flux core mig welder. And thoughts from the welders out there ?

    Thanks
     
  2. Dec 27, 2015
    eti engineer

    eti engineer Member

    Great Central...
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    I sil-brazed one once with great results. Do you have an oxy-acetylene rig? It happened on an oil pan in a car where removing the oil pan was going to be a major hassle. I drained the oil and flowed argon gas through it as I did it and it kept the oil from flashing. If you can remove your pan it would be best..
     
  3. Dec 27, 2015
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    York, PA
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    I never had much luck with flux core on thin metal. I agree that brazing would work well and removing the pan is best.
     
  4. Dec 27, 2015
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    What sort of shape is the metal around the hole in? If it's at all thin then welding it will be a PITA- you'll be chasing new holes all over the place. I'd suggest removing it, cleaning the affected area well & using an epoxy patch material on it. Top coat with a good sealant paint & call it acceptable. :)

    H.
     
  5. Dec 27, 2015
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    I've patched them with epoxy putty and gotten a few years of service, even without removing the pan. Cleaning and prepping is the key.

    Otherwise I too would recommend brass brazing
     
  6. Dec 28, 2015
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    Flux core wire is the last thing I would use. Conditions need to be near perfect to get a good weld.
    Removing the pan and brazing would be best, using good flux on a clean surface. Mig would work, as long as there is solid metal around the hole. Otherwise, epoxy.
    Cleaning is key to a good repair no matter what method is used.
    -Donny
     
  7. Dec 28, 2015
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
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    If you're just looking for a quick fix, a tiny bit of silicone on the threads of a short pan-head sheetmetal screw will do the trick.

    Otherwise braze or epoxy, as has been said.

    Trying to weld it if it is that thin - you will probably end up with one big hole instead of one tiny hole, unless you can put a patch on it and reach back to areas that have some meat.
     
  8. Dec 28, 2015
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    If the pan is off, you could even solder the holes shut. I don't think there would be much difference in strength between solder and braze, and would tend to trust a soldered repair more than epoxy putty.
     
  9. Dec 28, 2015
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    This is the best option to me. I don't know what your doing with your jeep, but I would go with this method until you find a solid pan. With my luck it would produce more holes when I am 100 miles from no where.
     
  10. Dec 28, 2015
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    I'd agree IF the soldering is on a very well prepped surface. The higher heat of brazing tends to better guarantee a good seal with less work, IMHO.
     
  11. Dec 28, 2015
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    Ok, so the consensus is remove the pan and braze. I was hoping to fix it without removing the pan since it's all painted and pretty but oh well.

    Thanks

    [​IMG]
     
  12. Dec 28, 2015
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
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    with the engine looking that nice you would have thought the pan was inspected before assembly. i mean the rust should have stuck out like a turd in a punch bowl on the inside of the pan if there was a hole in there. brazing would be the way to go or do the self tapper screw with the silicone until you can source another pan. i've seen pans rust from the inside out as well from just sitting and not driving.
     
  13. Dec 28, 2015
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    There were no areas of concern to me. Mostly looked like surface rust. I guess the sand found a spot. The hole is literally the size of a grain of sand

    [​IMG]
     
  14. Dec 29, 2015
    Unkel Dale

    Unkel Dale delivery on my Jeep from Ft. Campbell, Ky.

    Pittsburgh, Pa.
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    I still have a short number ten sheet metal screw and rtv 8 year fix three inches above the floor of the pan
     
  15. Dec 30, 2015
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Back during my last year of High School in Fairbanks, we got a small pin hole in the oil pan during winter.
    Cleaned up the pan around the hole and sealed it with SealsAll. Don't think it ever leaked after that. At least not from that hole. That was back in 1968-69.
     
  16. Dec 30, 2015
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Wow, that is pitted pretty badly.
     
  17. Dec 30, 2015
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
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    THAT IS WHAT I THOUGHT
     
  18. Dec 30, 2015
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Like I said, use the screw method to hold you over until you find another pan.
     
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