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Re-torquing barrels

Discussion in 'Norton Commando Motorcycles (Classic)' started by gortnipper, Jan 22, 2019.

  1. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    After the rebuild, I have re-torqued the five external barrel base nuts, as well as the head nuts/bolts (installed new ARP sets on both). However, I didnt pull the head to do the four internal bolts.

    I am going to re-torque again, and am wondering about those four internal bolts and whether or not I should really pull the head for this time?
     
  2. Torontonian

    Torontonian

    Joined:
    Dec 28, 2009
    I've never pulled a head just to re-torque the 4 long barrel bolts. If weeping or any leakage appears then that is just cause , but I would be happy until that , and then you have plenty of time to deal with it.
     
    gortnipper likes this.
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Perhaps it’s just my paranoia, but it’s one of the reasons I don’t use a gasket under the barrel, if there’s nothing to compress, the through bolts can’t loosen. Well at least that’s my uneducated theory!
     
    The Buckeye Rider likes this.
  4. ashman

    ashman

    Joined:
    Jul 11, 2010
    Over 43 years of ownership I have never retorque the 4 inside barrel bolts even after rebuilds and after head work I only retorque the head once not like some who retorque many time in a short period of time, but back to the barrel nuts and bolts, I have never had any problems with weeping or leaks, if there is no leaks or weeps I wouldn't worry about it.
    I am still using all my orginal head and barrel nuts and bolts and I use a base gasket, 850 Commando motors are pretty good at keeping oil inside, so if its not leaking then leave it alone is my motto.

    Ashley
     
    MexicoMike likes this.
  5. ludwig

    ludwig

    Joined:
    Aug 30, 2006
    After torqueing up the barrel , I put the complete engine minus head in the oven (when wife isn't looking )
    1 h , a little over 100 °C , to let it go trough at least one heat cycle .
    Then retorque after cooling .
    Probably useless , but it can't hurt either ..
     
    Last edited: Jan 23, 2019
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  6. oldbeezer

    oldbeezer VIP MEMBER

    Joined:
    Nov 2, 2017
    until your wife finds out
     
    Fullauto, texasSlick and Fast Eddie like this.
  7. ashman

    ashman

    Joined:
    Jul 11, 2010
    Whats for tea tonite dad??? Roast Norton.
     
  8. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    How do get away with that?!!! That's brilliant
     
  9. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    Until she catches you at it....The outcry could take years to fade.
     
  10. The Buckeye Rider

    The Buckeye Rider

    Joined:
    Jan 1, 2005
    When the wife comes into the kitchen and sees me sitting next to the stove with an oven mitt on one hand and a shop manual in the other she just shakes her head and leaves the room. She doesn't even ask about the bearings in the freezer!
    Ride On
    Dave
     
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  11. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    "What's that petroleum smell in the house"

    " I dunno, it must be coming from that Refinery down in Washington state. The air has been full of it all day"

    Glen
     
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  12. rvich

    rvich VIP MEMBER

    Joined:
    Jul 25, 2009
    I'm a lucky guy. My wife could care less if I leave the toilet seat up, blow my nose in the shower, pee off the deck or bake Norton parts in the oven. I also clean them in the stainless kitchen sink and bake on paint.

    The bad news is it makes it hard to get good boy points for not doing things that piss her off. I'm also the cook in the house and am pretty fastidious about cleaning up, so that goes a long way in keeping the peace.
     
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  13. kerinorton

    kerinorton

    Joined:
    Feb 12, 2013
    Hi David. A lot of engines made now are designed not to be re torqued, simply because its impossible to do as in the case of your 850. I think because of that, you are best to leave it alone, including [ not ] re torquing the accessible nuts.
    Dereck
    ps Are you going to Akaroa.
     
  14. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    Hmm... not so sure on the accessible nuts? :confused:

    Yeah, sent my fees in yesterday. You? Sent you email yesterday as well.
     
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  15. oldbeezer

    oldbeezer VIP MEMBER

    Joined:
    Nov 2, 2017
    I think ummmm that the Norton engines referred to in this thread were not designed recently.
     
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  16. Peter R

    Peter R

    Joined:
    Dec 13, 2010
    It's not the engine design, it is the gasket material. Modern engines use MLS (multi-layered-steel) head gaskets, and re-torque is un-nesessary.
    I wonder if this material will ever find its way to our old bikes.
     
  17. kerinorton

    kerinorton

    Joined:
    Feb 12, 2013
    Its probably not likely that the barrels will warp, but will they. My reused solid copper head gaskets don't seem to need re-torquing. I don't consider a CF Bedford 2.3 litre to be a modern engine.
     

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