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The BMW Range
3 Series
E46
E46 N42 Weird Noises
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<blockquote data-quote="jeffreyewe" data-source="post: 611718" data-attributes="member: 9"><p>The N42 is indeed a sensitive engine. The sounds from the rear seems to sway towards a faulty vacuum pump as said by iceduke. Rattling sound from the engine is pretty hard to distinguish judging from the video as it sounds more like something loose within the engine bay. Did your mech plug in the diagnostic tool before doing the overhaul? Sometimes a faulty crankshaft sensor will also cause some rattling to the engine.</p></blockquote><p></p>
[QUOTE="jeffreyewe, post: 611718, member: 9"] The N42 is indeed a sensitive engine. The sounds from the rear seems to sway towards a faulty vacuum pump as said by iceduke. Rattling sound from the engine is pretty hard to distinguish judging from the video as it sounds more like something loose within the engine bay. Did your mech plug in the diagnostic tool before doing the overhaul? Sometimes a faulty crankshaft sensor will also cause some rattling to the engine. [/QUOTE]
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E46 N42 Weird Noises
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