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#1
10-20-2012, 06:31 PM
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2000 S430 loud rattle in the exhaust near cats
Wtf any ideas?
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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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#2
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
10-20-2012, 09:00 PM
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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
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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1999 w140, did it my way, next life hopefully south america
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#5
10-21-2012, 01:40 PM
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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
10-21-2012, 05:04 PM
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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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 1990 190E 3.0L
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#7
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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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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