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#1
02-13-2010, 05:14 PM
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Excessive muffler noise
This is for my 1979 240 D, w123.
Exhaust noise louder than normal lately. So I look underneath, here is a shot at about the side mirror, passenger side. If this is a probable cause of the noise, can someone show me what it should look like, or what they did for a similar fix? I'm thinking I just need to tighten the clamp, which is kinda loose, but maybe the pipe is ready to break due to the rust? (I did search, and someone had posted "cut a tin can lengthwise and use 2 clamps. " That is almost what I need here, isn't it?)
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1991 300E 124.030 103.983KE 722358 03 412178 207K 1979 240D 123.123 250K (Project car) 2000 Ford Ranger, 187K 2015 Dodge Ram 1500 EcoDiesel 37K 
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#2
02-13-2010, 05:48 PM
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That clamp doesn't look so good, and neither does the pipe. The expensive fix is to take it to a muffler shop and have the rotten parts replaced. The cheaper fix starts with trying to tighten the clamp, and then if that doesn't work, a can and some hose clamps.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. 99 Mazda Miata 183,xxx miles.
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#3
02-13-2010, 06:31 PM
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Most of the other repairs that came up when I searched had to do with welding, muffler tape or epoxy, etc.
Skippy, you are correct, I don't want to spend a bunch of $$ right now and my state is not that fussy when it comes to inspections, so a "band aid" approach is what I am looking for. Probably will go with clamp/muffler tape and some reinforcing pipe/sheet metal wrapped over all with a couple hose clamps. Actually, if this is the source of the noise, I'm pretty lucky. It could be a lot worse. Edit: I took another look, and everything is pretty solid, in other words the exhaust pipe is not moving, no visible space, etc. I think I'll just tighten the clamp and not change anything for the time being. (Learned from having to change the radiator; sometimes it is best not to mess too much with rusted parts.)
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1991 300E 124.030 103.983KE 722358 03 412178 207K 1979 240D 123.123 250K (Project car) 2000 Ford Ranger, 187K 2015 Dodge Ram 1500 EcoDiesel 37K Last edited by mbzr4ever; 02-13-2010 at 11:15 PM.
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#4
02-14-2010, 07:19 AM
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It looks like some one has tried welding it up previously. I would take that clamp off, it looks st##fed anyway, then wrap a can around it , then a couple of exhaust clamps. A drive over some mud may also help.
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#5
02-14-2010, 12:23 PM
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You know, layback40, you might be right. Somewhere in its long history, someone might have welded the connection.
I'll see if the tightened clamp does not resolve the noise/exhaust leak problem. Then it would be what you suggest for part II. I also have some muffler cast handy, just in case.
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1991 300E 124.030 103.983KE 722358 03 412178 207K 1979 240D 123.123 250K (Project car) 2000 Ford Ranger, 187K 2015 Dodge Ram 1500 EcoDiesel 37K
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