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Thread: 4HP22 Rear Output Seal Replacement?

  1. #1
    Join Date
    Jul 2007
    Location
    Canada
    Posts
    14

    Default 4HP22 Rear Output Seal Replacement?

    I've already removed the output flange and old seal, but am curious as to what is the best way to drive in the new seal. Would a generic seal driver from the local auto parts store fit around the output shaft to drive the seal in? Or is there a better method people used to drive it in evenly so it does not go in sideways?

    Car is an '89 535iA.

    Cheers,
    -Emil

    1988 635CSi - 1989 535i

  2. #2
    Join Date
    Jan 2008
    Location
    Quebec, Canada
    Posts
    608

    Default

    IF the old seal is in decent condition you can use that, or a socket that fits the metal part exactly.


    BMW E34 1992 525i Touring

    RIP Touring...probably never going to drive you again...

  3. #3
    Join Date
    May 2004
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    Japan
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    9,270

  4. #4
    Join Date
    Mar 2006
    Location
    East Brunswick, New Jersey
    Posts
    879

    Default

    A piece of plywood with a cutout? I don't use it because I can get a socket from my 3/4" drive socket set made in you know where.
    Last edited by yaofeng; 12-08-2008 at 03:39 PM.
    '01 540it, 6/01
    '03 325i 5 speed, 9/02
    '10 535ix. 9/09
    '10 mini 6 speed
    '15 mini countryman 6 speed

  5. #5
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    Jul 2007
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    Canada
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    Default

    Looks like I may go the wood route. I'm having my friend who's a woodworker make me a wooden ring that will fit around the output shaft and can be used to evenly distribute pressure on the seal when lightly hammered on!

    Thanks for the suggestions, everyone.

    1988 635CSi - 1989 535i

  6. #6
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,843

    Default

    good route, try to make sure the seal is drifted in evenly. I use a coating of silicone on the outside of the seal for added measure.

    Quote Originally Posted by emil View Post
    Looks like I may go the wood route. I'm having my friend who's a woodworker make me a wooden ring that will fit around the output shaft and can be used to evenly distribute pressure on the seal when lightly hammered on!

    Thanks for the suggestions, everyone.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  7. #7
    Join Date
    Oct 2005
    Posts
    518

    Default

    I installed the output seal using a socket extension and light taps from a hammer. This method requires some care, but makes it fairly easy to drive the seal in evenly if you make sure to position the socket extension on the edge of the seal and leave part of the blunt end hanging past it. When you drive it in all the way, you naturally stop at the lip of the rear housing. If you can make a proper seal installation tool/ring, do so. In a pinch, a socket extension won't damage the seal and works well enough to drive it in. Just my $.02

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