Clutch Issues

DIB17 · 22-06-2010, 06:28 PM

Hi Guys. When driving hard and under highload, say changing gear anywhere above 5K rpm, with no lift of the throttle and fastest gear shift; as the clutch starts to engage, there is an increase in engine revs then as the clutch fully engages the revs settle and the car continues to accelerate. Is this clutch slur or a worn clutch? If I do the usual clutch test of accelerating from 30mph in 6th gear it does not slip. The car has done 58K miles and is on the original clutch. Driving hard does re-teach the clutch and the problem reduces but only lasts a day or so. Any advice would be appreciated as I would like to get you guys views before I discuss it with BMW.
Thanks, Dave

**shimmy** · 22-06-2010, 07:54 PM

i would guess clutch wear is the cause but i doubt the clutch is worn past the limits set by BMW

Both mine when changed were well within tollerances and changed under goodwill or warranty (as failed if not below limits)

Popular opinion is that the SMG software/kit cannot adjust very well for the slow wearing of the clutch and that eventually at some point causes clutch slip. Can be improved with certain driving styles and reprogramming of the software but will come back.

DuncanR · 22-06-2010, 10:25 PM

Welcome DIB17

**glendog74** · 22-06-2010, 10:57 PM

Quote:

Originally Posted by DuncanR

Welcome DIB17

1 post in 18 months of membership

**shimmy** · 22-06-2010, 11:45 PM

Quote:

Originally Posted by glendog74

1 post in 18 months of membership

only just got TINTERNET in Birmingham

DIB17 · 23-06-2010, 03:04 PM

What is the wear limit set by BMW? The car is booked in for Friday so I want to be armed with as much info as possible so I can get it covered on the extended warranty.

sailorbaz · 23-06-2010, 04:36 PM

Here you go mate, a whole post on what to do and say to BMW, ;-)

CSLReg Linky

**grumps** · 23-06-2010, 04:42 PM

Bmw told me that mine was worn below the min spec and upon removal it was like new as was the dmf!I wish i could borrow their tool i'd make a killing on that basis

Bounce · 23-06-2010, 06:28 PM

Quote:

Originally Posted by DIB17

What is the wear limit set by BMW? The car is booked in for Friday so I want to be armed with as much info as possible so I can get it covered on the extended warranty.

I think its 1.1mm,i had a new clutch and fly wheel fitted under warranty due to clutch slur at 62k miles,the clutch plate was good for another 60k

car is pulling like a train again now.

DIB17 · 24-06-2010, 10:22 PM

Quote:

Originally Posted by sailorbaz

Here you go mate, a whole post on what to do and say to BMW, ;-)

CSLReg Linky

I can't open this link for some reason...apparently I don't have permission! I have searched for the topic as well but cannot find it...any ideas guys?

22-06-2010, 06:28 PM	#1
DIB17 S2 - Picking it up Join Date: Jan 2009 Location: Solihull Posts: 77 Casino cash: $5308	Clutch Issues Hi Guys. When driving hard and under highload, say changing gear anywhere above 5K rpm, with no lift of the throttle and fastest gear shift; as the clutch starts to engage, there is an increase in engine revs then as the clutch fully engages the revs settle and the car continues to accelerate. Is this clutch slur or a worn clutch? If I do the usual clutch test of accelerating from 30mph in 6th gear it does not slip. The car has done 58K miles and is on the original clutch. Driving hard does re-teach the clutch and the problem reduces but only lasts a day or so. Any advice would be appreciated as I would like to get you guys views before I discuss it with BMW. Thanks, Dave __________________ Dave SG CSL

22-06-2010, 07:54 PM	#2
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	i would guess clutch wear is the cause but i doubt the clutch is worn past the limits set by BMW Both mine when changed were well within tollerances and changed under goodwill or warranty (as failed if not below limits) Popular opinion is that the SMG software/kit cannot adjust very well for the slow wearing of the clutch and that eventually at some point causes clutch slip. Can be improved with certain driving styles and reprogramming of the software but will come back. __________________ .

22-06-2010, 10:25 PM	#3
DuncanR CSL Register Uber-poster! Join Date: Sep 2009 Location: Olney, Bucks Posts: 3,735 Casino cash: $9984	Welcome DIB17 __________________ " I use Gleaming Kleen.... for that new car look " I wish I had used - Race Data Systems - Motorsport Data Loggers forgive me Nathan !

23-06-2010, 03:04 PM	#6
DIB17 S2 - Picking it up Join Date: Jan 2009 Location: Solihull Posts: 77 Casino cash: $5308	What is the wear limit set by BMW? The car is booked in for Friday so I want to be armed with as much info as possible so I can get it covered on the extended warranty. __________________ Dave SG CSL

23-06-2010, 04:42 PM	#8
grumps S4 - Getting the hang of it Join Date: Oct 2009 Location: devon Posts: 181 Casino cash: $632	Bmw told me that mine was worn below the min spec and upon removal it was like new as was the dmf!I wish i could borrow their tool i'd make a killing on that basis