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The BMW Range
3 Series
E46
Vibrating/rattling noise during cold start and acceleration
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<blockquote data-quote="ndsolo" data-source="post: 665012" data-attributes="member: 22843"><p>My mechanic says no issue with the chain tensioner. He disconnected the pump which blows extra air for morning start. The noise is still there so he reconnected it.</p><p></p><p>Hmmm, the sound is most apparent during cold start in reverse gear, and goes down once a bit warm. Comes on and off when I press the accelerator. I will get a friend when I start the car in the morning and hold the gear in reverse while I record the sound.</p><p></p><p>It is a rough constant sound like some loose metal sheet vibrating.</p></blockquote><p></p>
[QUOTE="ndsolo, post: 665012, member: 22843"] My mechanic says no issue with the chain tensioner. He disconnected the pump which blows extra air for morning start. The noise is still there so he reconnected it. Hmmm, the sound is most apparent during cold start in reverse gear, and goes down once a bit warm. Comes on and off when I press the accelerator. I will get a friend when I start the car in the morning and hold the gear in reverse while I record the sound. It is a rough constant sound like some loose metal sheet vibrating. [/QUOTE]
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Vibrating/rattling noise during cold start and acceleration
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