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Crank seals weeping after replacement

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    Crank seals weeping after replacement

    Hello, thought I'd ask a stupid question

    I've got my motor out of the car atm and have replaced damn near every seal on the thing. I put in my front and rear crank seals, as well as the cam and oil pump seals last week, and today noticed a slight leak at each. The rear main had the most substantial leak, and by that I mean it had dripped down the oil pan onto the piece that bolts on below the pan that accepts the tranny mounts and some oil had pooled there. There was maybe half a teaspoon of total leakage including what was still on the seal itself. The seals on the front had barely any oil, but enough to be picked up with a q-tip, so I'm wondering - is there some sort of universe where this is normal?

    I used the newer RMS that doesn't have a spring, with its install tool. It was super easy. I made sure the inner springs on the intermediate shaft and cam shaft weren't compromised. I didn't have a good view of the front crank seal but I went by feel and there didn't seem to be any resistance, if at all, once I got the intermediate seal lined up. I lubed them with a thin coat of oil on the seal as well as the carriers so maybe this is residual oil from that? I put oil in the motor, primed the oil pump, and then installed the timing belt and turned the motor over by hand a few times. The oil I'm using is Mobil 1 15w50.

    Last night I had just finished painted my timing covers and accessories so seeing this right before installing those wasn't the most encouraging thing in the world! I've wiped the oil off and will keep tabs on it over the next few days so it's possible I'm worried over nothing, but it's my first time doing this and it sure doesn't seem right!


    it's a Kenny Powers quote on wheels

    #2
    I don't see where you mention if the motor ha been run since the seals have been changed. If it hasn't been run, it's residual as the oil level is below both seals, if it's been run, you might have a leak. It's very easy to "fold" the seals when installing.
    john@m20guru.com
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      #3
      Thanks for the reply. It has not been run - it's been sitting on an engine stand in my garage. I don't have my dip stick installed but I'll throw that in and check the level, though it should be between 4 and 5 quarts. Here's hoping it's just residual oil!


      it's a Kenny Powers quote on wheels

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        #4
        Originally posted by Das Delfin View Post
        I put oil in the motor, primed the oil pump, and then installed the timing belt and turned the motor over by hand a few times.!
        1.Were you rotating the engine by hand while rotating the oil pump to properly prime it?
        2.Do you have valve cover gasket and rocker shaft plugs installed?

        If yes to 1 and no to 2, there is a good change that oil leaked out from the right shaft front and rear plug holes and ended up right in your F/R main seal areas (if engine seats level as it would in the car). Under pressure, oil comes out in the area by the right side F/R plugs to lubricate the cam.
        Last edited by zaq123; 03-11-2019, 06:42 PM.

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