exhaust-pipe nuts

Discussion in 'Airheads' started by boyblu, Nov 26, 2013.

  1. boyblu

    boyblu Adventurer

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    Most of you have already realized that airhead exhaust-pipe nuts do not nearly need to be torqued as recommended. A little beyond snug is all they need, some anti-seize on the threads. Ok?
    #1
  2. crazydrummerdude

    crazydrummerdude Wacky Bongo Boy

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    Ok.
    #2
  3. patrkbukly

    patrkbukly 52 Weeks of warm

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    10-4
    #3
  4. Beezer Josh

    Beezer Josh Moto-Amish

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    I prefer the use of the BFH-gets it nice and snug.
    #4
  5. disston

    disston ShadeTreeExpert

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    I may not put them on as tight as the book says but I do put them on f***ing tight. I use the BMW cast iron wrench and I hit it with a big hammer. If I had to remove these on the road it would be a problem. But if I had the wrench with me it would not be a problem.

    I forget what the reason was or is. There's some reason why we are supposed to resist the temptation of putting these on too loose.
    #5
  6. Beemerguru

    Beemerguru Beemerguru...G/S guy

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    Anti-seize on the threads and on the split rings

    I also put it on the header.collector, muffler where anything slides into anything else.
    #6
  7. mesher

    mesher Adventurer

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    I would have thought that if they don't come loose, they're tight enough. If they leak you'd know it, and if they were falling off you'd know it, or is that too simple a view? Is there a soft gasket in there which would blow apart if they aren't super tight? Mine have never been off, so I have no idea. Is it perhaps an issue of efficient heat transfer away from the exhaust port?
    #7
  8. ozmoses

    ozmoses Ride On

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    Block the crank!
    #8
  9. boxermoose

    boxermoose Now fully goosed

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    I believe the OP is being sincere

    :rofl
    #9
  10. Rob Farmer

    Rob Farmer Long timer

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    Optimal TA anti sieze and tightened hand tight with the exhaust spanner for me. Never had one come loose and they don't blow. So yes just as the OP says.
    #10
  11. Beemerguru

    Beemerguru Beemerguru...G/S guy

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    No soft gaskets but you do have to compress the split ring inside the exhaust nut so it makes a good seal. You don't need a breaker bar for that.

    Some models also have a sleeve insert at the header/collector that rusts out and must be replaced. If you leave that out, you'll know it the minute you fire up the engine...and so will the neighbors.
    #11
  12. Screaming Chicken

    Screaming Chicken Been here awhile

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    #12
  13. ME 109

    ME 109 Long timer

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    So is Ozmoses.

    :rofl
    #13
  14. Wirespokes

    Wirespokes Beemerholics Anonymous

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    There is a down-side of too tight, besides being hard to remove or possibly seizing. And that is - shrinking the header at the point where the sealing ring forces against the pipe.

    I'm not making this up - quite a few times I've had an exhaust leak and more torque on the nut didn't fix. A close look revealed the pipe had a groove in the sealing surface which required some metal-work to remove.

    I also clean the sealing rings very well on the wire wheel and coat everything in anti-seize. I never tighten the nuts any more than required to prevent leaks. So far in the 23 years I've ridden these bikes I haven't noticed any downside to this practice.
    #14
  15. Warin

    Warin Retired

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    Too loose ... is when the nut falls off ... done it twice. No problem ... bit of wood and a rock does it up tighter. Rather have those loose than tight .. they don't go anywhere other than along the pipe.
    #15
  16. mesher

    mesher Adventurer

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    Well, there ya go. This is what I love about internet forums: someone asks a question like how tight and you get a full spectrum of replies, from f***ing tight to just tight enough. Then we pick whichever advice we agree with, and go on our merry way. :D
    #16
  17. Padmei

    Padmei enamoured

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    No NO! i disagree.
    #17
  18. mesher

    mesher Adventurer

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    :lol3 That too.

    I should have said that internet forums are great *if* you don't know something and you need info - you read the different views, pick the one that makes most sense, and move on.

    Forums aren't so good once you have strong views on a subject, then there are all these other people out there who are *wrong* and it's so exhausting to have to shout them down every time they restate their wrong views. :D
    #18