CSL Register

Go Back   CSL Register > General > Technical Area

Reply
 
Thread Tools Display Modes
Old 16-04-2011, 12:16 AM   #1
DBT40
S2 - Picking it up
 

Join Date: Sep 2007
Location: Scotland
Posts: 56
Casino cash: $418
DBT40
Default clutch noise ( the clunk )

Hi all,
my csl has always made this noise as the clutch engages and disengages at low road speeds after getting driven hard, usually whilst getting back up the driveway it clunks and rattles like a bag of bolts. i've always just ignored it but now it's getting worse I'm feeling the need to attend to it before it breaks.
Does anyone know what causes the noise and would a new clutch stop it or is it another part of the system?
the car is on 45k, has no regular slur and changes gear as sweet as a nut, but does get, and has had a hard life.

thanks for any ideas.
DBT40 is offline   Reply With Quote
Old 16-04-2011, 02:13 PM   #2
grumps
S4 - Getting the hang of it
 
grumps's Avatar
 

Join Date: Oct 2009
Location: devon
Posts: 181
Casino cash: $632
grumps is on a distinguished road
Default

Duel mass flywheel ?
grumps is offline   Reply With Quote
Old 16-04-2011, 09:30 PM   #3
DuncanR
CSL Register Uber-poster!
 
DuncanR's Avatar
 

Join Date: Sep 2009
Location: Olney, Bucks
Posts: 3,735
Casino cash: $9984
DuncanR is on a distinguished road
Send a message via Skype™ to DuncanR
Default

Fluid level ?
__________________
" I use Gleaming Kleen.... for that new car look "

I wish I had used - Race Data Systems - Motorsport Data Loggers forgive me Nathan !
DuncanR is offline   Reply With Quote
Old 16-04-2011, 11:37 PM   #4
DBT40
S2 - Picking it up
 

Join Date: Sep 2007
Location: Scotland
Posts: 56
Casino cash: $418
DBT40
Default

fluids are all there, it has been doing it for as long as I can remember, and has been serviced a few times to say the least. It seems to be temperature related but after an early morning thrash today, didn't make any noises, sod's law. when it does it, it sounds like someone loading a gun as I reverse over the kerb into the driveway. it seems to happen when the clutch disengages after lifting off at crawling speed.
DBT40 is offline   Reply With Quote
Old 17-04-2011, 08:02 PM   #5
s.mac
CSL Register Uber-poster!
 

Join Date: Jun 2008
Posts: 4,247
Casino cash: $15600
s.mac is an unknown quantity at this point
Default

you sure its not the diff?
s.mac is offline   Reply With Quote
Old 17-04-2011, 09:40 PM   #6
DBT40
S2 - Picking it up
 

Join Date: Sep 2007
Location: Scotland
Posts: 56
Casino cash: $418
DBT40
Default

Quote:
Originally Posted by s.mac View Post
you sure its not the diff?
i suppose it could be, it should be well fooked by now. the diff would be an easier fix as well.
DBT40 is offline   Reply With Quote
Old 19-04-2011, 06:52 AM   #7
magnust
S4 - Getting the hang of it
 
magnust's Avatar
 

Join Date: Jan 2011
Location: Stockholm, Sweden
Posts: 138
Casino cash: $1477
magnust is on a distinguished road
Default

Or drive shaft joints (sorry, don't know the appropriate English name for them). When new they are are tight but when worn they get some play. I changed these (I had to change the whole drive shafts on each side since BMW don't sell the joints separately). This took away most of the gearshift clonking sound on my car
__________________
My Swedish track day / hobby racing site: www.rejsa.nu
magnust is offline   Reply With Quote
Old 20-04-2011, 10:36 AM   #8
DuncanR
CSL Register Uber-poster!
 
DuncanR's Avatar
 

Join Date: Sep 2009
Location: Olney, Bucks
Posts: 3,735
Casino cash: $9984
DuncanR is on a distinguished road
Send a message via Skype™ to DuncanR
Default

Quote:
Originally Posted by s.mac View Post
you sure its not the diff?
+1 on that
__________________
" I use Gleaming Kleen.... for that new car look "

I wish I had used - Race Data Systems - Motorsport Data Loggers forgive me Nathan !
DuncanR is offline   Reply With Quote
Old 20-04-2011, 11:23 AM   #9
mattCSLnut
CSL Register Uber-poster!
 
mattCSLnut's Avatar
 

Join Date: Sep 2009
Location: Cambridge
Posts: 6,460
Casino cash: $27763
mattCSLnut is on a distinguished road
Default

Quote:
Originally Posted by s.mac View Post
you sure its not the diff?
+ 2 ... Good call Steve
__________________

UK CSL No.020 ... after 7 years of ownership I've now SOLD it !!!
mattCSLnut is offline   Reply With Quote
Old 20-04-2011, 11:32 AM   #10
sailorbaz
Driving it like I nicked it
 
sailorbaz's Avatar
 

Join Date: Dec 2007
Location: Northern Ireland
Posts: 2,623
Casino cash: $14519
sailorbaz is an unknown quantity at this point
Default

Mine had a new diff just a couple of thousand miles ago and still clunks. It was changed due to a collapsed bearing, nothing to do with the noise. I'd noticed some oil on the garage floor one morning.

But, it does sound more like your diff' mate. What about that revised Oil that BMW put in the diffs? Maybe check see if it's had that.
__________________

My Car
2004 M3 CSL with Supersprint Lightweight Race and AP's front and rear

Quote:
Originally Posted by Niel333 View Post
...One thing I know is the CSL is nothing like a normal M3 and I am loving it!!
sailorbaz is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 11:51 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
(c)www.wickedwifi.co.uk