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Exhaust

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Old 12-27-2006, 02:37 AM
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Hi,

yesterday we went to the cinema. When the car accelerated as the traffic lights went green the engine reached about 2500 rpm. At that number of revolutions a very deep sound came from left behind. It was really deep and appeared only at approximately 2500 rpm.

Does anyone know if this is a sign of a broken exhaust? On the one hand I hope not because of the costs and on the other hand I expect a new exhaust with a nice sound

Some informations: We have a 525d and the temperature outside was 0?C and I could be wrong with 2500rpm. Could have been less.
Old 12-27-2006, 02:47 AM
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It's normal. Part of the way they have achieved Eur 4 emision norms. The system burns off at regular intervals.

What film did you see?
Old 12-27-2006, 02:49 AM
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Originally Posted by Flowerfred' post='371391' date='Dec 27 2006, 12:47 PM
It's normal.
It's the first time that sound appeared....
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