Loose Baffles in silencer - BMW Luxury Touring Community
 
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post #1 of 7 Old Jul 26th, 2012, 5:23 am Thread Starter
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Loose Baffles in silencer

Hi has any LT owner suffered with what sounds to be loose baffles in the silencer ?
At low revs and when I blip the throttle there is an awful rattling type noise which seems to come from the silencer but I am having difficulty pin pointing where this noise is coming from.
No problem when travelling at speeds over 50mph.
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post #2 of 7 Old Jul 26th, 2012, 6:03 am
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Re: Loose Baffles in silencer

I have a 99 LT with the same problem. There really isn't anything you can do with the muffler other than replace it.
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post #3 of 7 Old Jul 26th, 2012, 7:28 am
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Re: Loose Baffles in silencer

Quote:
Originally Posted by ronslaverda
Hi has any LT owner suffered with what sounds to be loose baffles in the silencer ?
At low revs and when I blip the throttle there is an awful rattling type noise which seems to come from the silencer but I am having difficulty pin pointing where this noise is coming from.
No problem when travelling at speeds over 50mph.
Hi, Ron - take a torque wrench (22Nm) to the exhaust header flange bolts (two per pipe) and see if maybe one or more might have loosened over time. They'll make a rattle like the dickens if the pipe(s) are allowed to move at the bolt-on. HTH.
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post #4 of 7 Old Jul 26th, 2012, 9:15 am
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Re: Loose Baffles in silencer

+ 1 on what Dick suggests...The exhaust flanges are known for their rattle when they get loose...Sometimes a weld will break and you have to get it tig welded back...

Betcha got a stud broken off somewhere... It happens...Happened on My LT..

Easy to fix.. Remove exhaust.. Usually the remainder of the stud will just back right out...

Good Luck

John

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post #5 of 7 Old Jul 26th, 2012, 12:18 pm
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Re: Loose Baffles in silencer

Two other sources of rattle:1) Make sure the heat shield cove hasn't come loose. 2) It could be that catalytic converter is crumbling. That happens, but not often. Not much to be done for that but replacement.

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post #6 of 7 Old Jul 26th, 2012, 5:09 pm
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Re: Loose Baffles in silencer

Quote:
Originally Posted by Bob204bc
Two other sources of rattle:1) Make sure the heat shield cove hasn't come loose. 2) It could be that catalytic converter is crumbling. That happens, but not often. Not much to be done for that but replacement.
Not positive, butt I don't think EU bikes have cat-verters --- maybe some do, butt most don't. They're usually a US mandated thang.
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post #7 of 7 Old Jul 26th, 2012, 5:44 pm
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Re: Loose Baffles in silencer

Quote:
Originally Posted by ronslaverda
Hi has any LT owner suffered with what sounds to be loose baffles in the silencer ?
At low revs and when I blip the throttle there is an awful rattling type noise which seems to come from the silencer but I am having difficulty pin pointing where this noise is coming from.
No problem when travelling at speeds over 50mph.
I had a similar rattle a while ago. It turned out to be a broken bracket that mounts the silencer to the frame, underneath the bike in the area where the hydraulic center stand.
The bracket is stainless steel and looks like a two metal rings welded together with two wires.
In my case, one of the wires broke off and when the engine vibrated on low rpms it was rattling / ringing. Re-welding the bracket took care of it.

BJ

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