Rear oil seal
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Rear oil seal

  1. #1
    Retired Air Force Master Sergeant's Avatar
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    Default Rear oil seal

    Pulling the BBC to replace the leaking rear main oil seal. Any tricks out there to prevent the same problem from happening again other than the obvious silicone on each halves of the seal?

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    gn7
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    Senior Member Josh@JBP's Avatar
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    Quote Originally Posted by gn7 View Post
    Just this. A 1 piece seal for a 2 piece block.

    Now how do you get that past the flange? must be a split somewhere

    You can offset each half by 3/8" or so, then the halves don't line up with the split on the main cap/block

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    Quote Originally Posted by gn7 View Post
    Just this. A 1 piece seal for a 2 piece block.

    You couldn't help yourself could you?

    Paul

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    Quote Originally Posted by Master Sergeant View Post
    Pulling the BBC to replace the leaking rear main oil seal. Any tricks out there to prevent the same problem from happening again other than the obvious silicone on each halves of the seal?
    Over the last six years of so I have been offsetting the parting lines from the cap. What I am saying is as you stick the seal in, one side will sit out of the block while the other side will be recessed in. You have to make sure you get the other half on the cap right so they won't fight each other as it is set in place and torqued. I have yet to have a drop of a leak since I started doing this. Others may have some good or better insight, but this is how I have done it with good success.

    Here is a picture of what I am talking about. The aluminum piece is to convert a one piece rear main seal block to a two piece rear main seal crank so just pay attention to the seal itself.



    Paul

  8. #6
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    I did that for a long time also.
    The big deal is not to cut the back side of the seal on the sharp edged block when installing.
    I went back to installing them the "normal?" way and being sure not to cut the backside. I use just a touch of ultra blue on the ends. I also use Mr. Gasket rear seals cuz never had one leak. Going with the devil I know.

  9. #7
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    Quote Originally Posted by Fiat48 View Post
    Going with the devil I know.
    That is a huge key, if it works for you, why change. Thanks for bringing up the "cutting the backsides" as that is a big key.

    Paul

  10. #8
    gn7
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    [/QUOTE]


    Quote Originally Posted by [email protected] View Post
    Now how do you get that past the flange? must be a split somewhere
    Yes, there is a split in it. If you look real close you can see it at about 1:00 in the pic. The split has a key notch in it as well. It is held to the crank with an o-ring wrapped around it in the groove you can see on the outside. And you just lower the crank into place. You only take off to move it to another crank. Yes, I have used them in more than once. Lots more.

    Quote Originally Posted by fc-Pilot View Post
    You couldn't help yourself could you?

    Paul
    What? You don't like this seal. Its the best seal on the planet.



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    Last edited by gn7; 10-28-2010 at 02:47 PM.

  11. #9
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    So...where does one get a seal like this? Who makes it?

    Tim

  12. #10
    gn7
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    They are made by Signal Seal and Fastensers. But they are going to sell you one.

    You can buy them here

    Part 10000-35
    LINK:1 piece rear main seal

    Doug Herbert sells them also.



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    Last edited by gn7; 10-28-2010 at 03:55 PM.

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    Quote Originally Posted by gn7 View Post
    What? You don't like this seal. Its the best seal on the planet.
    Sorry, I did not have my reading glasses on and thought it was one of those joke pictures. Just shows who is NOT paying attention. ME! Thanks for pointing that (the seal) out and tipping us off to a cool idea. I will have to try one of those one of these days.

    Paul

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    gn7
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    Quote Originally Posted by fc-Pilot View Post
    Sorry, I did not have my reading glasses on and thought it was one of those joke pictures.

    Paul
    Me Paul. I strike you as the type that would do that?

    Now here are some really hi performance hot tip setups you may want to try also.

    LINK: extreme top secret performance stuff



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    Last edited by gn7; 10-28-2010 at 04:39 PM.

  15. #13
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    Quote Originally Posted by gn7 View Post
    Me Paul. I strike you as the type that would do that?
    You bet I would, but only to someone I knew well. Thanks for the tip to the other items. I placed quite an order of needed parts.

    Now back to our regularly scheduled thread...

    Paul

  16. #14
    Senior Member stix818's Avatar
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    Do you guys install them any different if you were running a vaccuum pump?
    http://www.performanceboats.com//signaturepics/sigpic3592_1.gif
    Special Thanks to:
    Nelson Speed & Marine
    D21 ENT
    J.J. @ Beaver Fab
    Performance Boat Candy

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