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Old 11-26-2013, 02:50 PM   #1
boyblu OP
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exhaust-pipe nuts

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?
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Old 11-26-2013, 03:18 PM   #2
crazydrummerdude
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Ok.
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Old 11-26-2013, 05:52 PM   #3
patrkbukly
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loose nuts

10-4
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Old 11-26-2013, 06:26 PM   #4
Beezer Josh
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I prefer the use of the BFH-gets it nice and snug.
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Old 11-26-2013, 07:21 PM   #5
disston
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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.
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Old 11-26-2013, 07:25 PM   #6
Beemerguru
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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.
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Old 11-27-2013, 12:17 AM   #7
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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?
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Old 11-27-2013, 06:21 AM   #8
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Quote:
Originally Posted by mesher View Post
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?



Block the crank!
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Old 11-27-2013, 06:31 AM   #9
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Block the crank!
I believe the OP is being sincere

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Old 11-27-2013, 06:58 AM   #10
Rob Farmer
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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.
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Old 11-27-2013, 07:51 AM   #11
Beemerguru
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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.
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Old 11-28-2013, 02:12 AM   #12
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I just use these:

http://sternmutterersatz.de/
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Old 11-28-2013, 02:27 AM   #13
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I believe the OP is being sincere

So is Ozmoses.

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Old 11-29-2013, 08:24 PM   #14
Wirespokes
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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.
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Old 12-01-2013, 11:54 PM   #15
Warin
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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.
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