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  #1  
Old 09-06-2011, 09:16 AM
SwampYankee's Avatar
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Question Replacing Exhaust Buffers/Dampers

After tiring of an annoying rattle at idle, I tracked it down to the exhaust hangers. Missing two and the other two looked stretched. Replaced the four that I could see and the rattle went away. Now I've got heavier "pounding" under acceleration which I surmise is from no-longer existing exhaust buffers.

It appears that there should be two, one on each end of the muffler. Is there one further up in the vicinity of the resonator? Is there enough flex in the system to replace the buffers without dropping it completely? I don't have a lift but I've got ramps and jack-stands so I'm hoping I can get enough clearance by removing the hangers and pulling down on the tailpipe.

I assume the "nipple" on the top (in theory) pops into a hole in a bracket.

If someone has the right combination of key words that would bring a thread on this subject up on the "Search" function, I'd be happy to put them in because none of mine did.

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Old 09-07-2011, 06:41 PM
roundout's Avatar
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There are 4 total, I think, 2 on the muffler and 2 upstream. Been a while since I replaced mine.

As for the install, you're overthinking this. Get 4 new ones and R&R them one by one. There is plenty of flex in the system, especially with worn out hangers.
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Old 09-08-2011, 08:31 AM
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Quote:
Originally Posted by roundout View Post
There are 4 total, I think, 2 on the muffler and 2 upstream. Been a while since I replaced mine.

As for the install, you're overthinking this. Get 4 new ones and R&R them one by one. There is plenty of flex in the system, especially with worn out hangers.
Hangers or dampers/buffers? (I see them listed both ways, not sure what the preferred term is.) The hangers I'm good on, it's the dampers that go between the muffler and a bracket on the body that I'm wondering about.

I'm guessing I can pull the tail pipe down enough with the hangers off to get it in.

The schematic I have doesn't list part numbers and it's hard to tell if there are one or two of them. They're cheap enough anyway, I'll probably just buy two and dive in.
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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)
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  #4  
Old 09-08-2011, 08:37 AM
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There is plenty of flex in the system to replace the buffers. It may make it easier if you unhook a hanger or two
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  #5  
Old 09-08-2011, 10:39 AM
roundout's Avatar
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Sorry, I misread. I thought you were doing the hangers. My apologies.
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  #6  
Old 09-08-2011, 11:26 AM
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Answer

Quote:
Originally Posted by SwampYankee View Post
After tiring of an annoying rattle at idle, I tracked it down to the exhaust hangers. Missing two and the other two looked stretched. Replaced the four that I could see and the rattle went away. Now I've got heavier "pounding" under acceleration which I surmise is from no-longer existing exhaust buffers.

It appears that there should be two, one on each end of the muffler. Is there one further up in the vicinity of the resonator? Is there enough flex in the system to replace the buffers without dropping it completely? I don't have a lift but I've got ramps and jack-stands so I'm hoping I can get enough clearance by removing the hangers and pulling down on the tailpipe.

I assume the "nipple" on the top (in theory) pops into a hole in a bracket.

If someone has the right combination of key words that would bring a thread on this subject up on the "Search" function, I'd be happy to put them in because none of mine did.
The W123.193 wagon uses three rubber exhaust buffers, mounted to the body.


Rubber buffer, x3
MB# 1239870940
http://catalog.peachparts.com/item.wws?sku=123 987 09 40



.
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  #7  
Old 09-08-2011, 12:34 PM
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When you under the car, check the center support bearing rubber on the drive shaft.
If it is bad, it could make the kind of noise you describe.

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