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Heart Transplant

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

  1. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    I have done welding, but not aluminum. As I stated previously, I take it to a guy that has been in business 40 years, 3 brothers who got the business from their father many years ago.
     
  2. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Nope!
     
  3. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    [​IMG]

    This is a teaser. Normally you don't want to see your pistons at different heights on a Norton engine, unless it's got a 270˚ crank... which this one doesn't.

    Video of the first part of the disassembly of the bike coming Sunday...

    There is some good news and there is some bad news. You mostly know what the bad news is.
     
  4. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    How many miles did you have on that engine???
     
  5. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    No idea. Not that many, I think. Dunno.
     
  6. swooshdave

    swooshdave

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    Apr 15, 2009
  7. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    [​IMG]

    Is this salvageable? Is it worth saving? Despite the mess this is the only thing wrong with the barrel, everything else, including the bores are dirty but nice.
     
  8. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    [​IMG]

    There's a bit of damage on the inside with a pretty deep gouge.

    [​IMG]

    And something tried to come through here. Minor compared to the hole in the bottom.
     
  9. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Oh well, I guess it’s not too unexpected though eh?

    The barrel can only be salvaged by putting a liner in it. Even then, I would get it properly crack tested, AFTER boring it out to take the liner and BEFORE fitting it, to check cracks do not propagated further into the casting (thus allowing the liner to come loose, and drop, and put you back here again).

    The crank journal looks unlikely it’ll clean up with a grind, but it’s not easy to tell until you strip it and clean off the detritus with emery, you might be lucky. It could be welded up. But probably cheaper to buy a replacement crank half.

    The cases have clearly suffered massive trauma. The hole on the bottom is only evidence of the final exit point of the escaping rod. You’ve now found evidence of further trauma.

    As mentioned in previous posts, if it were a Vincent then yes, it’d be different because new cases are over £3,000, and much money is at stake regarding originality and provenance. But it’s not. And your best way of having good, strong cases is to find some good undamaged replacements. If you buy new ones you even get to keep your engine number !

    All only IMHO of course.
     
    swooshdave likes this.
  10. swooshdave

    swooshdave

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    Apr 15, 2009
     
    cliffa likes this.
  11. kommando

    kommando

    Joined:
    May 7, 2005
    The big end with the aluminium shell lining bonded to it can be cleaned using Hydrochloric acid, this will remove the shell lining but leave the steel big end untouched. Done it a few times to recover cranks in Briggs engines. Also called muriatic acid and concrete cleaner. You drip it on and it will fizzle, carry on dripping it on until the aluminium is all gone.
     
  12. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    I was hoping that is it. There are some marks that look like gouges in the journal but I'm hoping it's just in the bearing material.

    Sadly not my biggest concern right now.

    I really was hoping the barrel was unscathed, as unrealistic as that was. Very glad there was no damage to the head.
     
  13. kommando

    kommando

    Joined:
    May 7, 2005
    As long as those gouges are not in the steel but the aluminium the acid will remove it to reveal the steel which hopefully is untouched, did 3 briggs cranks and all were reused with no regrind needed but their con rod runs directly on the crank and the con rod is made from a bearing aluminium alloy but it does only need to cope with 3500 rpm max.
     
  14. grandpaul

    grandpaul VIP MEMBER

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    Jan 15, 2008
    I don't think those gouges will clean up at max undersize, but hope for the best!

    That is one sloppy mess, dude.
     
  15. baz

    baz VIP MEMBER

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    May 26, 2010
    What was the cause of the engine throwing a rod?
     
  16. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Lack of oil to the crank. Blown out oilpump seal or some gimmick devise to stop wetsumping would be my guess.
     
  17. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    That engine looks like it was taken apart once before. Letter Stamps on the flywheel. T and D. Plus the way the lock-wiring was done on the cam follower retainer screws. Too bad about the barrels but that is typical when a rod lets go. The cam followers and the cam still look good. Swoosh how is the gear on the cam? Did it survive?
    Cheers,
    Thomas
     
    Last edited: Feb 4, 2019
  18. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    IIRC it was a failed anti wet sump device.
     
  19. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    That's how rumors get started!

    Oil pump o ring fell off on refitting timing cover after having a gander looking for rattle.

    Glen
     
  20. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Oops.

    Sorry Dave.

    Well corrected Glen.

    I’ll get my coat...
     
    Mike T likes this.

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