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Heart Transplant

Discussion in 'Norton Commando Motorcycles (Classic)' started by swooshdave, Aug 17, 2018.

  1. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Dreer took it apart 30 years ago. Not for a full rebuild, just to make sure everything was ok. Not a ton of miles in the meantime. Not sure what exactly he did or didn't do. That was a long time ago.

    Gear on the cam? In the timing case? Don't know until I get in there.

    No rush. I have the spare motor to deal with first. Comstock says barrel is toast so I need to find an option there.
     
  2. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Sorry I should have said worm gear for the tach drive. In the timing case on the end of the cam is a sprocket.
    Cheers,
    Thomas
     
  3. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    It should be ok, more than likely the worse it had to do is chew on some aluminum. I suspect the steel big end exited the bottom of the engine pretty fast judging from the escape hatch it created.
     
  4. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Not a rattle, there was a gold looking film in the oil. Never will know what that was.
     
  5. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    About half right then.:)

    Glen
     
  6. Adam_R

    Adam_R

    Joined:
    Nov 20, 2015
    looks pretty much the same as mine did,
    my crank cleaned up fine, and wasn't bent, neither was the camshaft.
    good luck with the repair, I hope you are as fortunate as I have been with the damage.
     
  7. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    How did you clean up the rest of the bike? Did you strip the oil system and clean it? I'm not worried about the crank. More about the barrel.
     
  8. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
  9. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    [​IMG]

    Here's the barrel off the donor engine. I wouldn't be surprised if it was the original bore. One side is a little rusty but it looks better than I originally thought. Hopefully @comnoz can save it!
     
  10. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Use your old cracked barrel to cut out a chunk of cast and pattern the broken section then weld it up before the bore work. Cut the base plate off of the cracked barrel and make a tool to support the 17mm rod aka Mick Hemmings tool for tightening and loosening the timing pinion nut and cam nut. You would have to watch the video. When you get served nothing but lemons, then make lemonade.
    Cheers,
    Thomas
     
    Hortons Norton likes this.
  11. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    I'll hold onto the barrel in case I get desperate in the future and either have the crack welded or something. Maybe by then we'll have decent 3D printing and I can just recycle it...

    And you know I won't be welding anything. Someone who is actually skilled at it will. :cool:
     
  12. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    blaisestation likes this.
  13. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    I'm not ready for uncharted territory. I can barely make it through the territories I know...
     
  14. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    [​IMG]

    While I wait to hear what I need to do with the barrel I got some goodies to cheer me up. Two oil pressure sending units and the single cable carb kit from @madass140 Yes, it is as good as it looks.

    One of the oil senders is going to my brother... shhhh, don't tell him!
     
    gortnipper and Mike T like this.
  15. Danno

    Danno

    Joined:
    Feb 7, 2010
    I watched a video on cracked cast iron parts repair. It involved drilling and threading a series of holes in the crack and putting in threaded inserts which were ground flush. Welding was not even considered for machined surfaces.

     
  16. cyclegeezer

    cyclegeezer

    Joined:
    Jul 15, 2010
    Years ago when I worked for Hallmark Cards, I watched a similar repair on a Bobst embossing press that routinely cycled at 500 tons. Over time a crack developed from a casting hole in the rear main casting. It was still holding when I retired about 15 years later.
     
  17. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    Don's stuff is always nice.
     
    swooshdave likes this.
  18. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Nice!

    It will probably be cheaper to take one of my other barrels with a broken fin and have Jim fix it. I may look at the stitching in the future.

    The trick will be finding someone who knows how to stitch it correctly.
     
  19. Adam_R

    Adam_R

    Joined:
    Nov 20, 2015
    Everything bar the oil tank (which will be cleaned out) will more than likely end up on my broken bits shelf.
    The barrel damage was limited, my machinist has advised that the bore will clean up with a hone, there is a small chip to the bottom of one of the sleeve's but I intend to round this out.
     
  20. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    @Adam_R What did you do about the oiling system? Did you get new hoses? Was there actually debris in the oil tank or did your filter catch it all?
     

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