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  #1  
Old 10-20-2012, 06:31 PM
vstech's Avatar
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2000 S430 loud rattle in the exhaust near cats

Wtf any ideas?

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"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
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  #2  
Old 10-20-2012, 08:55 PM
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sorry for the verbosity... posted it from my phone.
the car has a nice smooth engine, but there is a very annoying rattle in the pipes, near the center of the car, in front of the resonators/cat. the pipes are not loose or touching anything, but it sounds like there is a socket or something rattling inside...
perhaps something came apart inside the pipes?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #3  
Old 10-20-2012, 09:00 PM
vstech's Avatar
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Location: Mount Holly, NC
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OK, several threads about the cats failing, and causing the rattle... good old search!
I'll check with the dealer and see if any extended warranty is in place, but it's unlikely.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #4  
Old 10-21-2012, 05:47 AM
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does it do it in park or neutral.reason I asked I have exhaust rattle in drive or reverse,and I have not cats or middle mufflers.
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  #5  
Old 10-21-2012, 01:40 PM
vstech's Avatar
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it does it in park/neutral.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 10-21-2012, 05:04 PM
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Location: California
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had the same problem on my 190e.....I'm sure you can hear the rattle even more if you accelerate. The problem is most likely the "honeycomb" inside the cat is loose. Since my tags are good until 6/13 I had my friend take out the cat and I will just get a new one once I get closer to my next smog check date. a way to test it is to life the car up and go bang on the cat with your fist, engine off. You will probably hear it rattle inside.
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  #7  
Old 10-31-2012, 08:55 PM
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Tapping on the cats with a rubber mallet is a good test.

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