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#1
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Clanking noise when accelerating, sometimes.
In the last couple of days I have noticed a loud clanking noise when the car is accelerating moderately. The noise sounds like cans being drug behind a car, like at a wedding. It is fairly loud and happens occasionally but only under moderate acceleration. I checked under the car and everything seems perfect, including the exhaust. Anyone have any ideas?
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 |
#2
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Check you exhaust hangers yet again, then check the motor mounts and the exhaust bushings at the tranny.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#3
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Exhaust bearings !
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2007 C 230 Sport. |
#4
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What is an exhaust bearing?
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 |
#5
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Check that your fan is not scraping the lower part of the shroud due to the engine mounts sagging with age. Also check your drive shaft center support bearing.
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#6
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Quote:
Sounds like " Q " may be on to something.
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2007 C 230 Sport. |
#7
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This is what the exhaust bushing kit looks like.
Picture straight from FastLane In FastLane you'll find it under part # 201 490 00 37, also known as an exhaust suspension kit.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#8
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Quote:
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2007 C 230 Sport. |
#9
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Thanks for all the suggestions. I went on a 3 week vacation and in that time the noise had stopped, I drove around 1500 miles.
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 |
#10
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Look for missing parts now...maybe catalytic converter cover?
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#11
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Yeah, I should probaly check under the car. I took plenty of trips on dirt roads going around 50 mph, smoothly though. It's funny seeing all of these people with SUV's going super slow to not get them dirty.
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 |
#12
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I had this noise and it turned out to be the catalytic convertor breaking up inside. When I took it all apart lots of bits of catalyst fell out of the other boxes!
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Mick J '08 Chrysler 300CRD (MB OM 642 engine) '95 E220 estate '89 230TE (R.I.P.) |
#13
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zerozero - your last post gave a good clue - travelling on dirt roads at high speed. I have had stones wedge up between the muffler and heat shield on VW Jettas causing the same sort of sound - the muffler has to flex a little at moderate acceleration for the stone to vibrate - stronger or less acceleration jams the stone so it does not vibrate- the twist on the muffler has to be just right- physically removing the stone or having it vibrate out usually cures the problem. Hope this helps
Morris |
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