3500 RPM

sard · 11-04-2008, 11:58 PM

Hi guys, when you're driving between 3500 rpm and 4000 rpm with little or no weight on the gas pedal do you hear this faint sorta high pitched knocking/clicking sound? It's really hard to describe. Not exactly like alternator whine through the speakers, but more like knocking sounds from the spark plugs causing interference through your stereo. My previous car made that noise due to the spark plugs (supposedly from what the car audio shop said). You have to turn the radio off to hear it because it's pretty quiet. It does not sound like it's coming from the speakers but from the engine itself. I think it speeds up as the rpm goes up a little. Needless to say, it's pretty annoying if you sit there and concentrate on it.

From your experiences did the engine noise heard from inside the cabin get louder or quieter after the 1200 break in/ service?

Sadd · 11-05-2008, 01:43 AM

dude dont worry about that..many of our M3s do that, I took mine to BMW just because of that noise, they kept it for like 1 day and told me that they tried other m3s and they did the same...there is a huge ass thread about this, you ll find more information

MDCTFTW · 11-05-2008, 02:34 AM

No idea what you're talking about w/o video.

sard · 11-05-2008, 08:22 AM

Quote:

Originally Posted by Sadd

dude dont worry about that..many of our M3s do that, I took mine to BMW just because of that noise, they kept it for like 1 day and told me that they tried other m3s and they did the same...there is a huge ass thread about this, you ll find more information

I did search. The thread about engine noise was for like 2000 RPM and was described differently and were supposedly caused by exhaust expansion. I'll try and record the noise if I can later after work today. Can you show me these threads, maybe I searched poorly.

Sadd · 11-07-2008, 02:08 PM

here u go
http://www.m3post.com/forums/showthread.php?t=167402

sard · 11-07-2008, 10:14 PM

Thanks for the link but that's different from what I'm hearing. Those are like random ticks between 1-3k rpm. Mine are constant fast sounds like radio interference almost between 3,500-4,000 rpm. I think it's just the way the engine sounds normally. I'll have to drive someone else's M3. The dealer head foreman said it was normal and it's the cam shafts making noise transitioning between low end and high end settings.

V1.47fan · 11-13-2008, 01:14 PM

Quote:

Originally Posted by sard

Thanks for the link but that's different from what I'm hearing. Those are like random ticks between 1-3k rpm. Mine are constant fast sounds like radio interference almost between 3,500-4,000 rpm. I think it's just the way the engine sounds normally. I'll have to drive someone else's M3. The dealer head foreman said it was normal and it's the cam shafts making noise transitioning between low end and high end settings.

I get the same noise too.

highyo · 07-26-2012, 04:16 PM

reviving a massively old thread, but i get it too

11-04-2008, 11:58 PM	#1
sard Major 235 Rep 1,334 Posts Drives: 2008 M3 Join Date: Oct 2008 Location: Southern California iTrader: (1)	3500 RPM - 4000 RPM Engine noise? Hi guys, when you're driving between 3500 rpm and 4000 rpm with little or no weight on the gas pedal do you hear this faint sorta high pitched knocking/clicking sound? It's really hard to describe. Not exactly like alternator whine through the speakers, but more like knocking sounds from the spark plugs causing interference through your stereo. My previous car made that noise due to the spark plugs (supposedly from what the car audio shop said). You have to turn the radio off to hear it because it's pretty quiet. It does not sound like it's coming from the speakers but from the engine itself. I think it speeds up as the rpm goes up a little. Needless to say, it's pretty annoying if you sit there and concentrate on it. From your experiences did the engine noise heard from inside the cabin get louder or quieter after the 1200 break in/ service?
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11-05-2008, 01:43 AM	#2
Sadd Private First Class 19 Rep 119 Posts Drives: 2013 Frozen White M3 Join Date: Jun 2008 Location: SoCal iTrader: (1)	dude dont worry about that..many of our M3s do that, I took mine to BMW just because of that noise, they kept it for like 1 day and told me that they tried other m3s and they did the same...there is a huge ass thread about this, you ll find more information
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11-05-2008, 02:34 AM	#3
MDCTFTW Lieutenant Colonel 123 Rep 1,973 Posts Drives: E92 DCT Join Date: Apr 2008 Location: Norcal iTrader: (0)	No idea what you're talking about w/o video. __________________ MDCT ... so you can drive and eat a hamburger at the same time.
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11-07-2008, 02:08 PM	#5
Sadd Private First Class 19 Rep 119 Posts Drives: 2013 Frozen White M3 Join Date: Jun 2008 Location: SoCal iTrader: (1)	here u go http://www.m3post.com/forums/showthread.php?t=167402
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11-07-2008, 10:14 PM	#6
sard Major 235 Rep 1,334 Posts Drives: 2008 M3 Join Date: Oct 2008 Location: Southern California iTrader: (1)	Thanks for the link but that's different from what I'm hearing. Those are like random ticks between 1-3k rpm. Mine are constant fast sounds like radio interference almost between 3,500-4,000 rpm. I think it's just the way the engine sounds normally. I'll have to drive someone else's M3. The dealer head foreman said it was normal and it's the cam shafts making noise transitioning between low end and high end settings.
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07-26-2012, 04:16 PM	#8
highyo Banned 15 Rep 408 Posts Drives: M3, X5 Join Date: Jan 2011 Location: nYc iTrader: (0)	reviving a massively old thread, but i get it too
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