light flywheel...slap, clunk...???

Tonifyd · 06-01-2011, 01:12 AM

I dunno exactly how to describe it, or whether or not it's normal.

When you're in first or second gear, and you lightly hit the gas, but have to stop, you kick in the clutch with the brake pedal, correct? For example, when you're inching away in tight spaces you have to slight dap the gas, then brake. etc..

I get this noise of either the clutch of the fly wheel.. like
"clack clunkity clunk"

It was somewhat there in my previous car, but not as loud as this one. I'm assuming it's cuz of a lighter flywheel than my previous car? and that's also why the revs drop so quickly?

Am I not doing it right?
normal or not?

saeedg48 · 06-01-2011, 01:16 AM

normal - it's BMW /sigh

Tonifyd · 06-01-2011, 01:17 AM

you can also hear it slightly when you shut off the engine...

BMRLVR · 06-01-2011, 01:17 AM

Quote:

Originally Posted by Tonifyd

I dunno exactly how to describe it, or whether or not it's normal.

When you're in first or second gear, and you lightly hit the gas, but have to stop, you kick in the clutch with the brake pedal, correct? For example, when you're inching away in tight spaces you have to slight dap the gas, then brake. etc..

I get this noise of either the clutch of the fly wheel.. like
"clack clunkity clunk"

It was somewhat there in my previous car, but not as loud as this one. I'm assuming it's cuz of a lighter flywheel than my previous car? and that's also why the revs drop so quickly?

Am I not doing it right?
normal or not?

The noise is normal, you are not doing anything wrong and your assumption about the light flywheel causing more noise than your previous car is exactly right!

Tonifyd · 06-01-2011, 01:19 AM

Quote:

Originally Posted by BMRLVR

The noise is normal, you are not doing anything wrong and your assumption about the light flywheel causing more noise than your previous car is exactly right!

cool. so next time my gf says
"why are you doing that you're doing something wrong"
I should say
"that's how it is in the M3 so STFU!"

SenorFunkyPants · 06-01-2011, 02:46 AM

Sure its not just the drive train (propshaft/driveshaft) making the noise?
There is some movement in a dual mass flywheel but I would be concerned if it made a noise you could hear inside the car.

markjord · 06-01-2011, 05:15 AM

It's a bit embarrassing when manoeuvring in the car park. Need to depress the peddle quite gently to reduce the clatter. I used to think the tranny was falling apart. But I found a guy at the gym with the identical M3. Drove it around a bit and his did the same. Maybe not quite as loud as mine but similar. So it's normal. Don't worry. Enjoy its idiosyncrasies.

Bubbles · 06-01-2011, 06:05 AM

It's BMW's signature Death Rattle, a $3k option to scare off "would be" criminals by tricking them into believing the car will breakdown if stolen. Embrace it

1sikbmr · 06-01-2011, 07:57 AM

Quote:

Originally Posted by Tonifyd

cool. so next time my gf says
"why are you doing that you're doing something wrong"
I should say
"that's how it is in the M3 so STFU!"

She shouldn't be talking in the car anyways... gotta hear the roar of the S65

bruce.augenstein@comcast. · 06-01-2011, 10:48 AM

Quote:

Originally Posted by BMRLVR

The noise is normal, you are not doing anything wrong and your assumption about the light flywheel causing more noise than your previous car is exactly right!

Not to say the OP is doing anything wrong, but are you sure about the "light" dual-mass flywheel in the M3? It may be slightly lighter than the flywheel in the E46 because of the cylinder count, but my impression of German flywheels is that they are exact duplicates of those found in WWII U-boats.

Just how heavy is the flywheel in the E9X, and how much lighter is it compared to the E46 model?

Bruce

Tonifyd · 06-01-2011, 07:28 PM

..should I post a youtube vid?

BMRLVR · 06-02-2011, 03:43 AM

Quote:

Originally Posted by bruce.augenstein@comcast.

Quote:

Originally Posted by BMRLVR

The noise is normal, you are not doing anything wrong and your assumption about the light flywheel causing more noise than your previous car is exactly right!

Not to say the OP is doing anything wrong, but are you sure about the "light" dual-mass flywheel in the M3? It may be slightly lighter than the flywheel in the E46 because of the cylinder count, but my impression of German flywheels is that they are exact duplicates of those found in WWII U-boats.

Just how heavy is the flywheel in the E9X, and how much lighter is it compared to the E46 model?

Bruce

Who cares how heavy it is compared to the E46.... The flywheel is fairly light hence the noise.

bruce.augenstein@comcast. · 06-02-2011, 12:45 PM

Quote:

Originally Posted by BMRLVR

Who cares how heavy it is compared to the E46.... The flywheel is fairly light hence the noise.

Perhaps I was being unduly polite.

I am challenging your assertion. As far as I know, the current M3 flywheel is a heavy, dual-mass unit designed specifically to counteract gear rattle at idle.

As far as I can tell, you are making an assertion with no evidence to back it up.

If I'm wrong, just tell me, without bluster if you can manage that.

Bruce

PS - It's also possible that the OP is getting noise from the throwout bearing.

oanis · 01-15-2012, 10:09 AM

I have the 2010 e93 auto dct.... Having the same clunk sound when car is about to stop in D2 mode...itsless in d4 and if i manually changefrom 2 to 1 itwont happen.....i think its normal... WHAT I WANTED TO ASK IS THAT I GET THE SAME NOISE BUT LOUDER EVERYTIME WHEN I CHANGE THE GEAR TO REVERSE OR D AT STANDSTILL...car has done 5000 miles... The noise which comes at standstill when i changeto reverseor d didnt use to come till the first service i think, i maybe wrong...plz help.... When driving shiftsare butter smooth and super fast with no sound or jerk..PLZ HELP REGARDING THE SOUND COMING AT STANDSTILL WHEN CHANGING TO D OR R

TTSam · 01-15-2012, 10:57 AM

Quote:

Originally Posted by Tonifyd

I dunno exactly how to describe it, or whether or not it's normal.

When you're in first or second gear, and you lightly hit the gas, but have to stop, you kick in the clutch with the brake pedal, correct? For example, when you're inching away in tight spaces you have to slight dap the gas, then brake. etc..

I get this noise of either the clutch of the fly wheel.. like
"clack clunkity clunk"

It was somewhat there in my previous car, but not as loud as this one. I'm assuming it's cuz of a lighter flywheel than my previous car? and that's also why the revs drop so quickly?

Am I not doing it right?
normal or not?

I get the same thing.

I do find a subtle feathering or blip on the gas before engaging the clutch eliminates the clunk for the most part. This is only after warmup. In cold conditions for the first 2 or 3 minutes, the MT sounds like a bucket of bolts and requires a light touch.

No issues from second gear and up.

Canuckles · 01-15-2012, 02:42 PM

^+1

Engine intake and exhaust sound is intoxicating, and way better sounding than clutch/flywheel chatter.

Radiation Joe · 01-16-2012, 10:03 AM

I'm pretty sure what the OP is experiencing is from the driveline; specifically the diff. BMW for some insane reason decided to mount the diff with very flexible mounts. I have to work the clutch very carefully at low speeds to avoid the 'clunk'.

I'm with Bruce on the flywheel weight. My e46 had a boat anchor for a flywheel. I don't believe BMW has changed their tune significantly with our cars. On the other hand, what's funny, is that I still get a gear rattle out of my car, even with all the dual mass complication BMW has put into it.

M3PO · 01-16-2012, 01:16 PM

Quote:

Originally Posted by bruce.augenstein@comcast.

Perhaps I was being unduly polite.

I am challenging your assertion. As far as I know, the current M3 flywheel is a heavy, dual-mass unit designed specifically to counteract gear rattle at idle.

As far as I can tell, you are making an assertion with no evidence to back it up.

If I'm wrong, just tell me, without bluster if you can manage that.

Bruce

PS - It's also possible that the OP is getting noise from the throwout bearing.

+1, the flywheel is a heavy dual mass flywheel meant to keep chatter to a minimum. I love that people assume that their car is full of race car parts just because it's an M3. A lot of the noise is from the throw out bearing.

stefan · 01-16-2012, 01:21 PM

100% normal. It is the throwout bearing, however. Not the flywheel. Race clutches sound quite a bit different.

You can easily replicate this sound in 1st gear (as opposed to second) with a very brief, abrupt, acceleration without fully releasing the clutch pedal, and immediately shoving it back in. Will get your throwout bearing sound every time. Normal.

Personally I love the mechanical-ness of it all. You should learn to love it, too

edit: I should add this has been the case for nearly all new BMWs since the E46. Happened in my E46 M3, E82 135i, etc.

RussRamz · 01-16-2012, 04:02 PM

Read the M3 supplement to your owner's manual. It (the noise) is entirely normal.

///My5UV · 01-16-2012, 08:19 PM

The dual-mass flywheel makes it worse, but I think it's just driveline (ie, diff, driveshaft, transmission) gear lash. It's the same sound and behavior as my wife's Z3 but worse.
It's a sign that you should let it warm up more before driving.

e92m3allday · 01-16-2012, 10:20 PM

yup normal... it doesn't really happen to me anymore I found a new technique to prevent it, for 90% of the time atleast.

Try this: when at low speeds or in situations as OP, push the clutch in very gently and smoothly. Once you smoothly past the point of engagement, you can just push the clutch in all the way. BUT, you have to get on the clutch as soon as you let off the gas, otherwise it will "clunk".

hope it works for you because it does get kinda annoying!

06-01-2011, 01:12 AM	#1
Tonifyd Lieutenant 41 Rep 471 Posts Drives: 2011.75 JB E90M3 6MT Join Date: Mar 2011 Location: Korea iTrader: (0)	light flywheel...slap, clunk...??? I dunno exactly how to describe it, or whether or not it's normal. When you're in first or second gear, and you lightly hit the gas, but have to stop, you kick in the clutch with the brake pedal, correct? For example, when you're inching away in tight spaces you have to slight dap the gas, then brake. etc.. I get this noise of either the clutch of the fly wheel.. like "clack clunkity clunk" It was somewhat there in my previous car, but not as loud as this one. I'm assuming it's cuz of a lighter flywheel than my previous car? and that's also why the revs drop so quickly? Am I not doing it right? normal or not? __________________ 2011.75 E90 ///M3 6MT \| JB \| Blk \| CF \| ZCP \| ZCV \| ZCW \| ZP2 \| 403 \| 6NR \| 752 [Sold T.T] '95 Integra GS-R [Stolen-RIP] \| '05 Legacy GT Stg 2[Traded] \| '08 STi Stg 2+[Sold]
	Appreciate 0 Tweet Quote

06-01-2011, 01:16 AM	#2
saeedg48 Brigadier General 342 Rep 3,574 Posts Drives: Porsche 991.1 GT3 Join Date: Nov 2008 Location: Newport Beach, CA iTrader: (1)	normal - it's BMW /sigh __________________ 2015 Porsche 991.1 GT3 2015 F80 M3 -- Individual; Space Grey
	Appreciate 0 Quote

06-01-2011, 01:17 AM	#3
Tonifyd Lieutenant 41 Rep 471 Posts Drives: 2011.75 JB E90M3 6MT Join Date: Mar 2011 Location: Korea iTrader: (0)	you can also hear it slightly when you shut off the engine... __________________ 2011.75 E90 ///M3 6MT \| JB \| Blk \| CF \| ZCP \| ZCV \| ZCW \| ZP2 \| 403 \| 6NR \| 752 [Sold T.T] '95 Integra GS-R [Stolen-RIP] \| '05 Legacy GT Stg 2[Traded] \| '08 STi Stg 2+[Sold]
	Appreciate 0 Quote

06-01-2011, 02:46 AM	#6
SenorFunkyPants Brigadier General 2511 Rep 4,381 Posts Drives: 2019 M5 Join Date: Mar 2009 Location: UK iTrader: (0)	Sure its not just the drive train (propshaft/driveshaft) making the noise? There is some movement in a dual mass flywheel but I would be concerned if it made a noise you could hear inside the car.
	Appreciate 0 Quote

06-01-2011, 05:15 AM	#7
markjord Second Lieutenant 34 Rep 288 Posts Drives: M3 E92 2007 Jerez Black Join Date: Aug 2009 Location: Wellingborough iTrader: (0)	It's a bit embarrassing when manoeuvring in the car park. Need to depress the peddle quite gently to reduce the clatter. I used to think the tranny was falling apart. But I found a guy at the gym with the identical M3. Drove it around a bit and his did the same. Maybe not quite as loud as mine but similar. So it's normal. Don't worry. Enjoy its idiosyncrasies.
	Appreciate 0 Quote

06-01-2011, 06:05 AM	#8
Bubbles Brigadier General 2753 Rep 4,445 Posts Drives: Green Bastard Join Date: Jun 2007 Location: Bishop Bend iTrader: (3)	It's BMW's signature Death Rattle, a $3k option to scare off "would be" criminals by tricking them into believing the car will breakdown if stolen. Embrace it __________________
	Appreciate 0 Quote

06-01-2011, 07:28 PM	#11
Tonifyd Lieutenant 41 Rep 471 Posts Drives: 2011.75 JB E90M3 6MT Join Date: Mar 2011 Location: Korea iTrader: (0)	..should I post a youtube vid? __________________ 2011.75 E90 ///M3 6MT \| JB \| Blk \| CF \| ZCP \| ZCV \| ZCW \| ZP2 \| 403 \| 6NR \| 752 [Sold T.T] '95 Integra GS-R [Stolen-RIP] \| '05 Legacy GT Stg 2[Traded] \| '08 STi Stg 2+[Sold]
	Appreciate 0 Quote

01-15-2012, 10:09 AM	#14
oanis New Member 0 Rep 5 Posts Drives: m3 e93 dct 2010 Join Date: Jan 2012 Location: pakistan iTrader: (0)	I have the 2010 e93 auto dct.... Having the same clunk sound when car is about to stop in D2 mode...itsless in d4 and if i manually changefrom 2 to 1 itwont happen.....i think its normal... WHAT I WANTED TO ASK IS THAT I GET THE SAME NOISE BUT LOUDER EVERYTIME WHEN I CHANGE THE GEAR TO REVERSE OR D AT STANDSTILL...car has done 5000 miles... The noise which comes at standstill when i changeto reverseor d didnt use to come till the first service i think, i maybe wrong...plz help.... When driving shiftsare butter smooth and super fast with no sound or jerk..PLZ HELP REGARDING THE SOUND COMING AT STANDSTILL WHEN CHANGING TO D OR R
	Appreciate 0 Quote

01-15-2012, 02:42 PM	#16
Canuckles First Lieutenant 115 Rep 331 Posts Drives: MW 2016 F82 M4 Join Date: Feb 2011 Location: British Columbia iTrader: (0)	^+1 Engine intake and exhaust sound is intoxicating, and way better sounding than clutch/flywheel chatter.
	Appreciate 0 Quote

01-16-2012, 10:03 AM	#17
Radiation Joe Veni Vidi Vici 89 Rep 2,750 Posts Drives: '11 JB/BBe-6sp-e90 Join Date: Jul 2008 Location: Macungie PA iTrader: (0) Garage List 2011 e90 M3-Sold [8.50] 2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00]	I'm pretty sure what the OP is experiencing is from the driveline; specifically the diff. BMW for some insane reason decided to mount the diff with very flexible mounts. I have to work the clutch very carefully at low speeds to avoid the 'clunk'. I'm with Bruce on the flywheel weight. My e46 had a boat anchor for a flywheel. I don't believe BMW has changed their tune significantly with our cars. On the other hand, what's funny, is that I still get a gear rattle out of my car, even with all the dual mass complication BMW has put into it. __________________ Dinan compliment of stuff plus PF rotors and RG63s. Enough for now. Why, yes. I am an abrasive bastard.
	Appreciate 0 Quote

01-16-2012, 01:21 PM	#19
stefan Brigadier General 2354 Rep 4,254 Posts Drives: M2 Comp Join Date: Feb 2008 Location: North iTrader: (2)	100% normal. It is the throwout bearing, however. Not the flywheel. Race clutches sound quite a bit different. You can easily replicate this sound in 1st gear (as opposed to second) with a very brief, abrupt, acceleration without fully releasing the clutch pedal, and immediately shoving it back in. Will get your throwout bearing sound every time. Normal. Personally I love the mechanical-ness of it all. You should learn to love it, too edit: I should add this has been the case for nearly all new BMWs since the E46. Happened in my E46 M3, E82 135i, etc. __________________ ///M Power
	Appreciate 0 Quote

01-16-2012, 04:02 PM	#20
RussRamz M Slut 18 Rep 564 Posts Drives: 2011 M3 Coupe Mineral White Join Date: Sep 2007 Location: Adenau, GE via 3 years in dreadful El Paso, TX iTrader: (0)	Read the M3 supplement to your owner's manual. It (the noise) is entirely normal. __________________ You have to be 100% behind someone before you can stab them in the back. David Brent
	Appreciate 0 Quote

01-16-2012, 08:19 PM	#21
///My5UV Lurker 78 Rep 812 Posts Drives: YMB F80, SS E90 Join Date: Nov 2010 Location: Austin iTrader: (0)	The dual-mass flywheel makes it worse, but I think it's just driveline (ie, diff, driveshaft, transmission) gear lash. It's the same sound and behavior as my wife's Z3 but worse. It's a sign that you should let it warm up more before driving. __________________
	Appreciate 0 Quote

01-16-2012, 10:20 PM	#22
e92m3allday Second Lieutenant 70 Rep 236 Posts Drives: 2024 X5 M40i Join Date: May 2010 Location: Wayne NJ iTrader: (1)	yup normal... it doesn't really happen to me anymore I found a new technique to prevent it, for 90% of the time atleast. Try this: when at low speeds or in situations as OP, push the clutch in very gently and smoothly. Once you smoothly past the point of engagement, you can just push the clutch in all the way. BUT, you have to get on the clutch as soon as you let off the gas, otherwise it will "clunk". hope it works for you because it does get kinda annoying!
	Appreciate 0 Quote