cold start rattle,is this OK ? (vid)

mikusk · 03-02-2015, 05:20 PM

only happens when cold starting,otherwise not present.

mikusk · 03-02-2015, 05:31 PM

fixed link.

Tracyis300 · 03-02-2015, 07:42 PM

Sounds normal to me.
It's just the cold start cycle booting up.

swagkingcole · 03-02-2015, 08:34 PM

sounds normal

caslca · 03-02-2015, 08:39 PM

sounds normal to me as well but my car doesn't do it. Mine is US spec E92 '13 ZCP

caslca · 03-02-2015, 08:42 PM

btw, not same engine but very similar sound here:

Seems caused by tensioner chain. This m3post thread seems to refer to same issue on our engines:
http://www.m3post.com/forums/showthr...=412843&page=5

anom3 · 03-02-2015, 09:39 PM

this is normal.

not the same noise that i have reported in my extensive thread.

my understanding is this is caused by a 'dry vanos'.

you'll notice this is much more pronounced the longer the car sits without being started.

also, if you were to take a look at the audio of this noise, you'll notice it starts instantly after ignition takes place. the noise i was reporting was different, took place about 0.5 secs after ignition took place.

NashvegasR · 03-02-2015, 09:41 PM

Normal. There are a ton of threads about this on here --- rattle on startup. My E93 M3 2009 does this about 50% of the time on cold start. A pal's M3 does the same. Not a great noise, but the dealer told me it's normal and it's definitely something that occurs on most of these cars.

lve2xlr8 · 03-02-2015, 09:53 PM

Mine does this occasionally as well

TX · 03-02-2015, 10:30 PM

Look around on here. One guy had his engine basically torn down and rebuilt trying to locate that noise. I don't know if there was ever a resolution. There was a PUMA case posted by someone also where it was fixed by the dealer. Something to do with the vanos gear / chain tensioner. Mine does it. It sounds like grinding bolts around in my engine for a second after the car cold starts sometimes. It's a slapping chain against a tensioner is my assumption. Doesn't make me feel warm and fuzzy inside, but I doubt any of us would have much luck resolving it.

///M Power-Belgium · 03-03-2015, 08:18 AM

It's the metallic clunk noise when engine is cold .
A lot of S65's have this problem , and is caused by the Vanos-Gears .
Here a video of a very loud clunk noise , the video is not my car .

FISH22 · 03-03-2015, 08:25 AM

Is it a possibility that this sound is just a dry valve train upon start up? Reason I ask, is because I have noticed this in other high performance engines, mainly the S2000. I have owned 4 S2000s and all of them made this same noise right upon start up, if the car was sitting for a while. Over on S2ki it was mentioned that it was due to the valve train not getting oil instantly up top, and making the noise until it did (only a second). I have only owned my '11 M3 for a couple months, but it makes this noise if the car has been sitting for 12+ hours, and it sounds just like the S2000. Just my 2 cents.

knevel · 03-03-2015, 09:39 AM

I haven't had cold start for a long time, but that sounds about right.

Assimilator1 · 12-21-2019, 07:08 AM

Quote:

Originally Posted by FISH22

Is it a possibility that this sound is just a dry valve train upon start up? Reason I ask, is because I have noticed this in other high performance engines, mainly the S2000. I have owned 4 S2000s and all of them made this same noise right upon start up, if the car was sitting for a while. Over on S2ki it was mentioned that it was due to the valve train not getting oil instantly up top, and making the noise until it did (only a second). I have only owned my '11 M3 for a couple months, but it makes this noise if the car has been sitting for 12+ hours, and it sounds just like the S2000. Just my 2 cents.

(Thread revival

)

I agree, it does seem like this.
Btw, I'm a car mechanic, on pretty much every engine (various makes) that I've changed oil & filter on (that I can remember over the past ~25 yrs lol), they make the exact same rattle on start up (as per caslca's video, not the horrendous clonk on the 3rd video!), obviously that is down to the oil being drained, & the new oil having to find its way all round the engine, although I believe the noise is primarily top end.

When I heard my M3 do this on cold start up (and the oil wasn't changed) I was rather concerned! Glad to hear it appears to be 'normal', for these anyway.

For any long shut downs I'm toying with the idea of removing the fuel pump relay so that I can crank it without it firing up & allowing the oil pressure to build up. Although I would somehow have to bleed off residual fuel pressure 1st & then also clear out related codes.
Unless we can just crank them via a diagnostics computer?
Anyone tried this work around?

03-02-2015, 05:20 PM	#1
mikusk Private 13 Rep 57 Posts Drives: e92 m3 Join Date: Feb 2015 Location: slovakia iTrader: (0)	cold start rattle,is this OK ? (vid) only happens when cold starting,otherwise not present. Last edited by mikusk; 03-02-2015 at 05:30 PM..
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03-02-2015, 05:31 PM	#2
mikusk Private 13 Rep 57 Posts Drives: e92 m3 Join Date: Feb 2015 Location: slovakia iTrader: (0)	fixed link.
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03-02-2015, 07:42 PM	#3
Tracyis300 Lieutenant 108 Rep 536 Posts Drives: 09 E90 M3 Join Date: Sep 2014 Location: Los angeles iTrader: (0)	Sounds normal to me. It's just the cold start cycle booting up.
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03-02-2015, 08:34 PM	#4
swagkingcole Private First Class 17 Rep 104 Posts Drives: e92 m3 dct Join Date: Apr 2014 Location: United States iTrader: (1)	sounds normal
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03-02-2015, 08:39 PM	#5
caslca Enlisted Member 8 Rep 41 Posts Drives: '13 E92 M3 ZCP MineralWhite Join Date: Jan 2015 Location: Seattle, United States iTrader: (0)	sounds normal to me as well but my car doesn't do it. Mine is US spec E92 '13 ZCP
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03-02-2015, 08:42 PM	#6
caslca Enlisted Member 8 Rep 41 Posts Drives: '13 E92 M3 ZCP MineralWhite Join Date: Jan 2015 Location: Seattle, United States iTrader: (0)	btw, not same engine but very similar sound here: Seems caused by tensioner chain. This m3post thread seems to refer to same issue on our engines: http://www.m3post.com/forums/showthr...=412843&page=5
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03-02-2015, 09:39 PM	#7
anom3 Captain 260 Rep 955 Posts Drives: F30 335ix Join Date: Apr 2014 Location: Behind the wheel iTrader: (0)	this is normal. not the same noise that i have reported in my extensive thread. my understanding is this is caused by a 'dry vanos'. you'll notice this is much more pronounced the longer the car sits without being started. also, if you were to take a look at the audio of this noise, you'll notice it starts instantly after ignition takes place. the noise i was reporting was different, took place about 0.5 secs after ignition took place.
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03-02-2015, 09:41 PM	#8
NashvegasR Lieutenant 174 Rep 532 Posts Drives: 2016 M4 F83 Join Date: Dec 2012 Location: Portland, OR iTrader: (4)	Yes, normal Normal. There are a ton of threads about this on here --- rattle on startup. My E93 M3 2009 does this about 50% of the time on cold start. A pal's M3 does the same. Not a great noise, but the dealer told me it's normal and it's definitely something that occurs on most of these cars.
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03-02-2015, 09:53 PM	#9
lve2xlr8 Major 195 Rep 1,186 Posts Drives: E92 M3 Join Date: Aug 2008 Location: Los Angeles iTrader: (11)	Mine does this occasionally as well __________________ R8 V10 6MT S65 M3 Tesla 3
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03-02-2015, 10:30 PM	#10
TX Captain 366 Rep 860 Posts Drives: 2009 ///M3 E92 APW 6MT Join Date: Dec 2010 Location: South FL iTrader: (0)	Look around on here. One guy had his engine basically torn down and rebuilt trying to locate that noise. I don't know if there was ever a resolution. There was a PUMA case posted by someone also where it was fixed by the dealer. Something to do with the vanos gear / chain tensioner. Mine does it. It sounds like grinding bolts around in my engine for a second after the car cold starts sometimes. It's a slapping chain against a tensioner is my assumption. Doesn't make me feel warm and fuzzy inside, but I doubt any of us would have much luck resolving it. __________________
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03-03-2015, 08:18 AM	#11
///M Power-Belgium General 64253 Rep 24,867 Posts Drives: ///M3-E92-DCT Silverstone II Join Date: Jul 2012 Location: Belgium iTrader: (0)	It's the metallic clunk noise when engine is cold . A lot of S65's have this problem , and is caused by the Vanos-Gears . Here a video of a very loud clunk noise , the video is not my car . __________________ "MAX VERSTAPPEN" IS THE 2021+2022+2023 F1 WORLD CHAMPION - #UnLeashTheLion BPM DEV-Tune & DCT Software-Tune & Servotronic & coding ///Alpine HID Angeleyes ///Oem.exhaust mod.
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03-03-2015, 08:25 AM	#12
FISH22 Colonel 5414 Rep 2,030 Posts Drives: G80 M3 Competition Join Date: Apr 2012 Location: Chesapeake, VA iTrader: (1) Garage List 2021 BMW M3C [10.00] 2011 BMW M3 [10.00]	Is it a possibility that this sound is just a dry valve train upon start up? Reason I ask, is because I have noticed this in other high performance engines, mainly the S2000. I have owned 4 S2000s and all of them made this same noise right upon start up, if the car was sitting for a while. Over on S2ki it was mentioned that it was due to the valve train not getting oil instantly up top, and making the noise until it did (only a second). I have only owned my '11 M3 for a couple months, but it makes this noise if the car has been sitting for 12+ hours, and it sounds just like the S2000. Just my 2 cents.
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03-03-2015, 09:39 AM	#13
knevel Private 8 Rep 56 Posts Drives: your mom Join Date: Feb 2015 Location: sneaking up behind you iTrader: (0)	I haven't had cold start for a long time, but that sounds about right.
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