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      07-27-2011, 02:31 AM   #2
Big Tom
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Drives: 335i n54 e92 MT
Join Date: Mar 2009
Location: Västerås

Posts: 1,060
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That dosen't sound good.
The sound is there even when the AC is off and gets more pronounced when the AC is being activated.

It seems to be coming from the engine it self, and when the engine gets more load (AC on) the sound increases.

My guess is bad internals somewhere in the engine.
Big Tom is offline   Sweden
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