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  1. #1
    absentx's Avatar
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    Ruh Roh...Crank seal...

    So just cleaning up all my boats after the excellent get together this weekend and I noticed something on my pro that I didn't like too much...

    Looks like the rear crank seal is not seated properly and is kind of slipping out

    Picture below should clearly show the problem.

    Where do I start to tackle this problem????? Can I push the side thats coming out back in??

    Can you put in a new seal without splitting the cases?
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Name:	crank seal (1728 x 1296).jpg 
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  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Never tried to drive one back in.But guess it's possible. There is two seals,one faces internal pressure,and one seals from the outside. With the driveshaft out and coupler removed,you might be able to reposition it by driving it. I would coat it good with grease first and maybe make a wood block to press it back in. Worst case is it don't work and you have to split the cases to do it right,if it slides back in..Bingo

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Cases need to be split.

    BUT, I cheated and left the top end on before. Just a little lift and hold, and you can swap a seal easily.

  4. #4
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Quote Originally Posted by xlint89 View Post
    Cases need to be split.

    BUT, I cheated and left the top end on before. Just a little lift and hold, and you can swap a seal easily.
    But you would really have to be careful that you got all the old sealent off the cases,and resealed properly.

  5. #5
    absentx's Avatar
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    Yeah I forgot about the other seal in there...

    Really trying to avoid having to split the cases...Obviously with a pro that involves pipe/header removal and basically a complete Pain in the A$%.

    If I need to do that then I might as well replace the non matching piston and cylinder that I put in when I blew the engine up the first time...which is fine, but at this point there is really no need for a complete tear down on the engine, it maybe has 15 hours...if I were up near 75 or a 100 I would just say well its probably time for it anyway and put in some new parts.

  6. #6
    absentx's Avatar
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    Okay well here is what I did...

    Since the coupler on the pro is relatively small it leaves a lot of room to work. I took the coupler cover off and just tried to drive the seal back in there.

    Its not 100% perfect but its a helluva lot better than it was. Now it is at least seated properly over the wear ring. The spring is in tact around the whole seal. Hopefully I didn't hurt anything... Ill just say I used my "get out of having to lift the engine" card and if something goes wrong in the future Ill remember this and just say "well I got lucky that one time anyways, no biggie, lets pull the engine"

    Here is a picture of before and after:
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Name:	crank seal (1728 x 1296).jpg 
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ID:	145619   Click image for larger version. 

Name:	re seated.jpg 
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ID:	145620  

  7. #7
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Cool,So it worked,Did you lube it first?

  8. #8
    absentx's Avatar
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    Yeah I put some marine grease on it, then a shot of wd down towards the center of the seal because I knew I had to get it to slide on the wear ring too.

  9. #9
    mr. happyfunbear tenjuna's Avatar
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    I am having the same issue with my 650, and as randy from watcon told me in utica "if it came out once it will just come back out again...tear the engine part and fix it right".

    I reaaaaally want to just bang it back in myself, but the man has spoken.

  10. #10
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    The real question is...did it come out,or was it not position in right when assembled. It's hard to understand when there is 2 seals how does one move and not the other?

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