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      12-04-2012, 03:21 PM   #1
ljw350
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330d strange noise

Hi

Got a strange noise on my 330d. On tick over I can hear a duck like noise. Like a rubber valve squeaking.

Any ideas what it is

Thanks lee
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      12-09-2012, 03:32 AM   #2
Dr Dave
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I've got exactly the same noise!!! Seems to be coming from the manifold area of the engine - it does stop at times.

Very odd. I'm not concerned about it but I'll let you know what I find out!
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      12-09-2012, 04:16 AM   #3
HighlandPete
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Possibly the vacuum pump. Ease the oil filler cap off and it will likely be quite loud. Many are like it, if you identify it as the pump.

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      12-09-2012, 04:29 AM   #4
Dr Dave
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Yeah, it is a vacuum pump-type of noise Pete but I don't think it is related to engine speed whatsoever. I'll have a listen later.
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      12-09-2012, 12:29 PM   #5
ljw350
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I've done soon searching and vacuum has been mentioned. Apparently they have a vacuum to the engine mount and it could be this.

I'll leave it unti it's warmer and I can be bothered to fix
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      12-13-2012, 05:53 PM   #6
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I had it on my last 330d and never found out what it was so the theiving twat that nicked it can sort it now.
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