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      01-08-2017, 05:28 AM   #1
Rudz
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Bmw 330d - M57 is this engine noise normal?

Hey guys

I am after a commuter car, I've found a decent enough 330d that I would buy but for this noise from the engine bay [see video], is it normal? Note this is on cold start, the seller revs the engine at some point in the video, but the noise doesn't increase or decrease, even if its a problem is this a cheap fix? Thanks for your advice

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Last edited by Rudz; 01-08-2017 at 06:21 AM.
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      01-08-2017, 08:02 AM   #2
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Sounds like the alternator pulley or a belt at the front. Try to spray the belt /puley and see if the noise dissapears.
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      01-08-2017, 08:22 AM   #3
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It's difficult to compare using only sound from phones (as good as they are). Is it anything like this?



If not, then my money is on a belt, as already said.
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      01-08-2017, 08:30 AM   #4
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Quote:
Originally Posted by Sensible_ View Post
It's difficult to compare using only sound from phones (as good as they are). Is it anything like this?



If not, then my money is on a belt, as already said.
Nope nothing like that, cheers chaps, do u guys reckon it is it an easy enough fix if it is the pulley?
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      01-08-2017, 10:13 AM   #5
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Quote:
Originally Posted by Rudz View Post
Hey guys

I am after a commuter car, I've found a decent enough 330d that I would buy but for this noise from the engine bay [see video], is it normal? Note this is on cold start, the seller revs the engine at some point in the video, but the noise doesn't increase or decrease, even if its a problem is this a cheap fix? Thanks for your advice

Hi i just started my 330d and i have the same noise , what this could be? And how much would cost to replace the belts and pulleys?
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SÚrgio
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      01-08-2017, 01:50 PM   #6
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I had a similar noise on mine, was proportional to engine RPM. In my case it was the alternator, more specifically the alternator bearing. Replaced the alternator and the noise is gone now.

Note - It could also be the belt tensioner which sits just below the alternator.
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      01-09-2017, 01:56 PM   #7
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No noise like that from mine!
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      01-09-2017, 03:57 PM   #8
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I didn't buy that car in the end, didnt want the hassle, thanks guys for your responses, appreciate it
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      01-11-2017, 05:58 PM   #9
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That's not a healthy sounding engine even without the pulley noise
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