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Worn PW3 cam

Discussion in 'Norton Commando Motorcycles (Classic)' started by Fullauto, Apr 20, 2018.

  1. ZFD

    ZFD

    Joined:
    Jan 23, 2010
    Not sure where Snotzo found a mention of the 29th. Our Open Day is this coming Saturday, the 28th July, as was said in "The Source" as well as our website.

    We will all be there- Ashley Cutler, who can tell you all about camshafts and tappets, Simon, our other buyer, Phil, our MD, and the whole Seifert family including myself.

    Joe/Andover Norton
     
  2. oldmikew

    oldmikew

    Joined:
    Jul 25, 2015
    In an engine that is just being cranked at low speed then yes , but surely not in one that has started. Even at 2000rpm
    the cam is turning at 1000 rev per minute. There will surely be very little loading on the lobe . the cam knocks the lifter and valve open , contact is reestablished as the valve closes. The nominal spring pressdure will be important if it lets the cam run away from the tappet when closing, for the impact will be much greater.
     
  3. gtiller

    gtiller VIP MEMBER

    Joined:
    Nov 5, 2012
    @Snotzo dude, don’t shoot the messenger! I was just confirming it’s on the Saturday not the Sunday!
     
  4. Snotzo

    Snotzo

    Joined:
    Mar 12, 2013
    Not shooting at you my friend, sorry if I gave you that impression.
    Saturday or Sunday, it is no matter to me, I won't be attending the AN open day.
    Three reasons,
    1/ Madnorton obviously doesn't want anyone to dispute his decision regarding the reason for the cam wear.
    2/ Fullauto appears to be uninterested in having an alternative and unbiassed assessment of either his or AN's matallurgists reports.
    3/ I've just had a project dropped into my lap, of Italian origin, having four cylinders, each with four valves, and not a worn cam in sight!

    Good luck with your open day AN.
     
  5. Fullauto

    Fullauto VIP MEMBER

    Joined:
    Apr 13, 2009
    I do not have the report. I am getting it from Ben. When I do, I will post it. For a bit of light entertainment, look at Jim Comstock's post.
     
    CanukNortonNut likes this.
  6. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    I do not have the report. I am getting it from Ben. When I do, I will post it. For a bit of light entertainment, look at Jim Comstock's post.[/QUOTE]

    Starting to see a pattern here.
     
  7. Fullauto

    Fullauto VIP MEMBER

    Joined:
    Apr 13, 2009
    So, Ashley, in the interests of fairness and letting everybody know what's going on with your testing of your faulty followers, please, do tell, what is happening and why do you show that followers are not available at the moment? Surely you must have come up with a new report saying how terrific they are by now.
     
  8. Mr. Rick

    Mr. Rick VIP MEMBER

    Joined:
    Feb 6, 2009
    Along the same line of letting everybody know what's going on: It's been more than a couple of weeks since we heard about Ben's forthcoming report. Any news there, Ken?
     
  9. Fullauto

    Fullauto VIP MEMBER

    Joined:
    Apr 13, 2009
    Nope
     
  10. 84ok

    84ok

    Joined:
    Aug 10, 2014
    good stuff for new folks, reading about it all, in one thread for the first time,

    mainstream certified air cooled general aviation piston engines have the same issues to date, in some ways worse,

    interesting history
    http://cessnaowner.org/h2ad-engine/
     
    Last edited: Aug 13, 2018

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