Whining noise from N52B25

Stream · 09-01-2015, 02:15 PM

Is it ok that my car has some noise with decreasing amplitude even after rpm arrow already shows idle value? Please see my video.
The reason I asking is that my car has some annoing whining noise. Noise level increases with rpm, it sounds like fuel pump, but it's coming from front of the car and not from oil filter. Noise doesn't changes when I switch P to D, so it's not tranny-related, I think.

Three_thirty_I · 09-01-2015, 05:59 PM

Are you talking about that whining noise as the end revs return to normal, in the background? That is as far as I know, the variable flow oil pump. They all do that! Actually commented on just that on a recent thread - Remus Powersound + AA Headers. The oil demand, just like coolant flow changes as the engine load and speed changes.

Stream · 09-02-2015, 01:24 AM

Quote:

Originally Posted by Three_thirty_I

Are you talking about that whining noise as the end revs return to normal, in the background? That is as far as I know, the variable flow oil pump. They all do that! Actually commented on just that on a recent thread - Remus Powersound + AA Headers. The oil demand, just like coolant flow changes as the engine load and speed changes.

Yes, that's the same sound after reving in that video.
I have found some info about this noise and looks like it's not normal. This sound (when it's loud) talks about bad oil pump chain and gear wheel.

Jashley73 · 09-02-2015, 06:28 AM

Every N52 I've ever heard sounds that way.

Three_thirty_I · 09-02-2015, 02:19 PM

Quote:

Originally Posted by Stream

Yes, that's the same sound after reving in that video.
I have found some info about this noise and looks like it's not normal. This sound (when it's loud) talks about bad oil pump chain and gear wheel.

I am sure if it is louder than normal then it can point to a worn oil pump etc. In fact, just this past Sunday we had a local BMW run and there was a 130i that had its engine revved near me - the noise from its oil pump seemed quite noisy compared to what mine and others sound like.

CININ · 07-09-2024, 10:33 PM

Did you find a solution? Have this issue

09-01-2015, 02:15 PM	#1
Stream T667YM86 71 Rep 244 Posts Drives: E90 325i 05' Join Date: Mar 2013 Location: Russia, Surgut iTrader: (0)	Whining noise from N52B25 Is it ok that my car has some noise with decreasing amplitude even after rpm arrow already shows idle value? Please see my video. The reason I asking is that my car has some annoing whining noise. Noise level increases with rpm, it sounds like fuel pump, but it's coming from front of the car and not from oil filter. Noise doesn't changes when I switch P to D, so it's not tranny-related, I think. __________________ E90 325i 05MY, ZSP, Koni Sport, Eibach Pro-kit, BBS RK-II squared
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09-01-2015, 05:59 PM	#2
Three_thirty_I Lieutenant Colonel 378 Rep 1,928 Posts Drives: 2010 BMW E90 330i M Sport Join Date: Aug 2010 Location: Cape Town, South Africa iTrader: (0) Garage List 2010 BMW E90 330i M ... [9.63]	Are you talking about that whining noise as the end revs return to normal, in the background? That is as far as I know, the variable flow oil pump. They all do that! Actually commented on just that on a recent thread - Remus Powersound + AA Headers. The oil demand, just like coolant flow changes as the engine load and speed changes. __________________ 2010 BMW E90 330i M Sport (M) Ex: BMW E90 330i (M) '05 (His) \| (Hers) BMW E46 320i f/l (M) '03
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09-02-2015, 06:28 AM	#4
Jashley73 Second Lieutenant 79 Rep 234 Posts Drives: '06 330i 6-M/T Join Date: May 2015 Location: Louisville, KY iTrader: (0)	Every N52 I've ever heard sounds that way.
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07-09-2024, 10:33 PM	#6
CININ New Member 4 Rep 23 Posts Drives: 2009 630i Join Date: Aug 2022 Location: Australia iTrader: (0)	Did you find a solution? Have this issue
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