rear engine seal - NCRS Discussion Boards

rear engine seal

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  • Michael D.
    Expired
    • August 31, 2001
    • 63

    rear engine seal

    i have a small leak after starting my rebuilt engine for the first time it is dripping down the inspection pan (rear of the engine) . the oil is very black in color , incontrast to the new oil in the engine. is this likey from the rear seal and will it stop when the engine is run?
  • Rob A.
    Expired
    • December 1, 1991
    • 2126

    #2
    Re: rear engine seal

    I had the same problem on an engine rebuild. Is it dripping down the front of the inspection cover, or out the bottom? I replaced the seal with an expensive high performance one, made sure the parting line did not line up with the seal ends per the instructions, and still had the leak a second time. Did you seal the rear main cap to the block when you installed it, as well as the seal ends?

    Comment

    • Chuck S.
      Expired
      • April 1, 1992
      • 4668

      #3
      Re: rear engine seal

      The black could be either from assembly lube (likely), or maybe from the elastomer in an improperly installed rear seal (less likely, but then the seal IS leaking).

      In itself, the black is not necessarily a concern, but the seal shouldn't be leaking. I also doubt it's going to heal itself and dry up...you're probably going to have to go back in. Like Rob said, be sure to seal the bearing cap and seal ends as directed in the service manual.

      Comment

      • Jim T.
        Expired
        • March 1, 1993
        • 5351

        #4
        Re: rear engine seal

        Michael are you using the original type rope type seal?

        Comment

        • Michael D.
          Expired
          • August 31, 2001
          • 63

          #5
          Re: rear engine seal

          the seal only leakled for about 10 minutes of running. it did quit, maybe a rope seal that dried out sitting for 6 months ?

          Comment

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