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Found This Metal In Oil Pan?

Discussion in 'Early CJ-5 and CJ-6 Tech' started by Kalva, Jun 24, 2019.

  1. Jun 24, 2019
    Kalva

    Kalva 1966 V6, Koening PTO Winch

    GA
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    Jul 5, 2015
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    Today I removed the oil pan to replace the gasket before installing the V6 into the Jeep.

    I Found these broken metal parts in oil pan, any idea what part of the engine its from, I'm guessing the oil rings falling apart but don't know how it made it into the pan. The engine was running well before I pulled it this is odd. IMG_3996.jpg

    Any help would be appreciated IMG_3996[3264].jpg
     
  2. Jun 24, 2019
    Keys5a

    Keys5a Sponsor Sponsor

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    Those do appear to be the backers for the oil rings, maybe one or two cylinders worth that made it to the pan. There may be more pieces still in the ring grooves. Either way, that can't be good. Is there any way these could have been in the pan from a previous issue? No pieces of the oil ring rails? It could be possible for these broken pieces to make their way out of the ring groove by working their way to the inside of the piston adjacent to the wrist pin.
    -Donny
     
  3. Jun 24, 2019
    Kalva

    Kalva 1966 V6, Koening PTO Winch

    GA
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    Donny,
    Thanks for info, I did see a small piece stuck up inside the piston. This really was not planned I was hoping not to do a rebuild.
     
  4. Jun 30, 2019
    Kalva

    Kalva 1966 V6, Koening PTO Winch

    GA
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    Update

    I pulled the heads off and took out the #3 piston because I found a piece of metal sticking into the inside of the piston when looking up thru the crank. It dose not look to be the oil expanders, yet its behind the oil expander ring set in the back of the oil ring grove, this is a little odd. I have not seen a flat ring behind oil expander and oil rings before. I think this was done to take up slack in a back yard rebuild or something?
     

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  5. Jun 30, 2019
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor 2019 Sponsor

    cordele, Ga.
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    Ouch!!!
     
  6. Jun 30, 2019
    Alan28

    Alan28 Well-Known Member Sponsor 2019 Sponsor

    Ch√Ętillon en...
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    I somegimes have surprises when checkinv this or that on mh CJ5.
    Souvenir from the p.o.
    He was very inventive but nothing serious.
    I hope that it is thd same for you.
     
  7. Jun 30, 2019
    Kalva

    Kalva 1966 V6, Koening PTO Winch

    GA
    Joined:
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    Donny and everyone thanks for the help, look at what it is: #2 Expander, its OEM cant believe it, never seen this before, live and learn. Now I just need to find a replacement set.
     

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  8. Jul 1, 2019
    Keys5a

    Keys5a Sponsor Sponsor

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    The part that was sticking out from under the piston is one of the rails. Those were actually quality rings. You can see the chrome wear surface on the outer edge. That ring set was likely a "chrome molly" set. They take a bit longer to break in, but seal and wear much better in the long run.
    I've seen expanders get out of postion and cause problems, but never the rails.
    Does the ring groove look damaged or is it OK? Any scratches or grooves on the cylinder walls?
    -Donny
     

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