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  1. Exclamation Rear main bearing oil seal

    Hi I had the rear main bearing seal replaced on my 1964 389 CI about 10 years ago. It has started to leak again slightly. Is there anything that can be done to stop the leak other than replacing the seal again? Is there an oil additive that can be used?
    Thanks for your time.

    Tony
    rph1966@hotmail.com

  2. #2
    Join Date
    Oct 2008
    Location
    Portland In
    Posts
    781

    Default

    Which style of seal did you use?

    Rope or Lip.

    Mike

  3. Default

    HI Mike
    Thanks for your reply. The seal was replaced by a shop that is no longer in business. I do not know what was used. I know that the rope seals were used originally but I don't know what was used in 1999.

    I wish I could give you more info.

    Thanks, Tony

  4. #4
    Join Date
    Oct 2008
    Location
    Portland In
    Posts
    781

    Default

    If it was done in 99 it was a rope, and worse fibreglass rope unless they found some old stock.

    Personally I'd install a BOP lip type seal.

    Mike

  5. #5
    Join Date
    Oct 2008
    Location
    Portland In
    Posts
    781

    Default

    http://www.bopengineering.com/

    400 and smaller cui are a small journal main 421 and larger are a large journal main.

    The company is very customer oriented and will answer all questions in a timely manner.


    If you prefer a resto company www.performanceyears.com also sells them.

    Mike

  6. Default

    Thanks for all your help.
    Tony

  7. #7
    Join Date
    Oct 2008
    Location
    Portland In
    Posts
    781

    Default

    No problem good luck with it.

    Be sure the seal groove is CLEAN before installing the BOP unit.

    MIke

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