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Cylinder Juggs Seperating from Crankcase

Discussion in 'XJ Technical Chat' started by Franz, May 5, 2020.

  1. Franz

    Franz Well-Known Member

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    Cut through the aluminium instead of the stud Pollock. Great idea. I was going to open up the hole in the case after l got it separated in the hope it wouldn't seize again. Having said that l am nearly 60 so once fixed it will outlast me :D.
     
    Last edited: May 8, 2020
  2. JBurch

    JBurch Active Member

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    The thing with a hole saw is that it will wander all over the place, and cut a hole larger than 12 mm
     
  3. Franz

    Franz Well-Known Member

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    The angle of the holesaw won't be 90 degrees to the stud too it will hit the crankcase. I like brainstorming you are all helping me find a solution thanks to all of you l appreciate your ideas. Going to whack it with my Bagpipes lol.
     
  4. JBurch

    JBurch Active Member

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    If the haggis didn't do it, not sure if the pipes will either.

    Question: is the bike still down on the floor or do you have it up on a lift? Just thinking about how much maneuvering room you have. I'm thinking of dry ice again. screw the nut back onto the stud just enough to protect the threads, dry ice on stud/boss chill area well, with your torch, heat the boss to warn, the idea is to take advantage of rates of thermal expansion, the aluminum will absorb heat faster than the steel stud, with a drift that is long enough to come down below frame rails, lay it on the stud/nut wack it with your hammer. I'm thinking that the drift will give you a better target to hit. Just another idea.

    "Do and hope" Clan Matheson
     
  5. Franz

    Franz Well-Known Member

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    Engine is on the floor at the moment, getting a portable bench tommorrow and I will try the dry ice to see if I can get it out. It is like putting a bearing in the freezer overnight before fitting it in to a casting, same principle.
     
  6. JBurch

    JBurch Active Member

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    Flip it on it's side and have at it!
     
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  7. Franz

    Franz Well-Known Member

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    Tried again but going to wait till l receive items in the post next week to remove it.
     
  8. Franz

    Franz Well-Known Member

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    Success. I am very pleased thanks guys for your suggestions and help on moving this seized crankcase stud. My cousin (who just got a 1000cc Suzuki V Strom, after selling his Aprillia 1000 phoned me about his new bike ) and I told him about the seized stud. He had some MAP gas and it did the trick.


    Cylinders Free of Crankcase.jpg
     
    Last edited: May 9, 2020
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  9. vashtsdaytona

    vashtsdaytona Active Member

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    Hooray!
     
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  10. JBurch

    JBurch Active Member

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    Good job!!
     
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  11. Franz

    Franz Well-Known Member

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    The juggs are sticking when nearly off the engine on one of the twelve studs for holding down the cylinder head but l put some penetrating oil down the problematic one and leave it overnight. I am pleased getting parts separated with no damage.
     
  12. vashtsdaytona

    vashtsdaytona Active Member

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    you've got the patience, you will succeed
     
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  13. Franz

    Franz Well-Known Member

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    More progress. That sheathing was jamming some of the cylinder head holding down studs.



    15891185892908596377393004969979.jpg
     
  14. jayrodoh

    jayrodoh YimYam Premium Member

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    Awesome
     
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  15. Dave in Ireland

    Dave in Ireland Well-Known Member

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    We even had electricity, laddie.
     
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  16. a100man

    a100man Well-Known Member

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    Please put some thing under the cam chain to stop it picking up crud form the engine casing
     
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  17. Franz

    Franz Well-Known Member

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    Good idea there is a small amount of it fell into the crankcase when l removed the cylinders. Going to replace both chains when l split the cases. I will get it meticulously clean before reassembly.
     
  18. a100man

    a100man Well-Known Member

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    Ah Ok - though it might only have been a tope-end rebuild - as you were!
     
  19. Franz

    Franz Well-Known Member

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    The starter chain was hitting the crankcase so l decided to change it, the plastic guide, starter clutch and cam chain. Bike ran great but l had tiny pieces of plastic too a warning sign of the guide going to break up.
     
  20. bensalf

    bensalf Well-Known Member

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    ;)
     

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