BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      11-20-2011, 10:38 PM   #1
RaptorKTM
Colonel
RaptorKTM's Avatar
United_States
72
Rep
2,367
Posts

 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego

iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Clutch - Delayed Engagement

I have been noticing that there is a delay from my foot full engagement to the clutch actually engaging, starting to annoy me because its making me feel like a retard driving it, which im not denying is possible but id like to think there is something that is doing this. I have seen a few threads about different clutch issues just not sure which out of them is this exact problem and how to fix it.
Appreciate 0
      11-20-2011, 10:49 PM   #2
ZCP M3
First Lieutenant
6
Rep
387
Posts

 
Drives: 2011 VO 1M Coupe #759
Join Date: Jul 2011
Location: St. Louis, MO

iTrader: (0)

You need to remove the Clutch Delay Valve (CDV) and bleed the clutch. It's between the clutch line and the slave cylinder.
Appreciate 0
      11-20-2011, 10:49 PM   #3
m3kerry
SCCA STU
m3kerry's Avatar
United_States
11
Rep
609
Posts

 
Drives: 335i Dinan stage 2 / 1 M
Join Date: Mar 2009
Location: Little Rock

iTrader: (0)

Quote:
Originally Posted by RaptorKTM View Post
I have been noticing that there is a delay from my foot full engagement to the clutch actually engaging, starting to annoy me because its making me feel like a retard driving it, which im not denying is possible but id like to think there is something that is doing this. I have seen a few threads about different clutch issues just not sure which out of them is this exact problem and how to fix it.
Cvd is causing this. Have it removed.
__________________
Thanks to: Hixson BMW, Race-Keeper, Koni, BimmerHaus, & Hoosier
2012 SUMMER NATIONALS SCCA PRO-SOLO BONUS CHALLENGE WINNER
2012 SUMMER NATIONALS SCCA PRO-SOLO A STOCK CHAMPION
2012 SCCA DIXIE A STOCK CHAMPION
www.facebook.com/thatsrightracing

Last edited by m3kerry; 11-21-2011 at 06:54 AM.
Appreciate 0
      11-20-2011, 11:28 PM   #4
RaptorKTM
Colonel
RaptorKTM's Avatar
United_States
72
Rep
2,367
Posts

 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego

iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Ok, could you by chance post a link to this, or is this something that the dealer can do?
Appreciate 0
      11-20-2011, 11:42 PM   #5
AM1N
Private First Class
AM1N's Avatar
United_States
1
Rep
157
Posts

 
Drives: VO 1M
Join Date: Oct 2011
Location: North Jersey

iTrader: (0)

Quote:
Originally Posted by RaptorKTM View Post
Ok, could you by chance post a link to this, or is this something that the dealer can do?
take it to a local shop who actually knows what they're doing.
Appreciate 0
      11-21-2011, 12:05 AM   #6
RaptorKTM
Colonel
RaptorKTM's Avatar
United_States
72
Rep
2,367
Posts

 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego

iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
ouch
Appreciate 0
      11-21-2011, 06:59 AM   #7
m3kerry
SCCA STU
m3kerry's Avatar
United_States
11
Rep
609
Posts

 
Drives: 335i Dinan stage 2 / 1 M
Join Date: Mar 2009
Location: Little Rock

iTrader: (0)

The clutch delay valve is there for people that can't drive stick. It cause really rough shifts. I have had it removed on my last two and it is night and day difference in shifting. You can have it removed and drilled out a little so it is still on the car if warranty issues are a worry.
__________________
Thanks to: Hixson BMW, Race-Keeper, Koni, BimmerHaus, & Hoosier
2012 SUMMER NATIONALS SCCA PRO-SOLO BONUS CHALLENGE WINNER
2012 SUMMER NATIONALS SCCA PRO-SOLO A STOCK CHAMPION
2012 SCCA DIXIE A STOCK CHAMPION
www.facebook.com/thatsrightracing
Appreciate 0
      11-21-2011, 08:09 AM   #8
gazz
///Mbassador
gazz's Avatar
Australia
10
Rep
1,077
Posts

 
Drives: The horse I fell off
Join Date: Apr 2007
Location: Gold Coast Australia

iTrader: (0)

You can keep the standard appearance by using the original valve. No need to drill anything, just pop out the restrictor in the valve using a suitable sized punch and put the valve back in line. You must pressure bleed the system afterwards. Dealer won't do this if the car is still under warranty. Should you be concerned that you will have a warranty issue at some time you can put the restrictor back in.
This is one the cheapest and simplest mods you can do.
Appreciate 0
      11-21-2011, 10:20 AM   #9
MusclezMarinara
Banned
United_States
79
Rep
5,022
Posts

 
Drives: VALNCYA
Join Date: Jan 2009
Location: Jersey

iTrader: (23)

Garage List
CDV DELETE
Appreciate 0
      11-21-2011, 10:31 AM   #10
torquedemon
Lieutenant
torquedemon's Avatar
United_States
7
Rep
404
Posts

 
Drives: BSM 1M
Join Date: Apr 2011
Location: Earth

iTrader: (0)

Garage List
does everyone have a CDV on the stock 1M's?? I haven't felt any such delay in the clutch...as in, when i want to shift, I can do it almost simultaneously with the depression of the clutch...
Appreciate 0
      11-21-2011, 10:38 AM   #11
MDORPHN
Colonel
41
Rep
2,544
Posts

 
Drives: AW 1M
Join Date: Oct 2010
Location: Wash, DC

iTrader: (0)

Quote:
Originally Posted by torquedemon View Post
does everyone have a CDV on the stock 1M's?? I haven't felt any such delay in the clutch...as in, when i want to shift, I can do it almost simultaneously with the depression of the clutch...
Yes.

Neil
Appreciate 0
      11-21-2011, 02:28 PM   #12
m3kerry
SCCA STU
m3kerry's Avatar
United_States
11
Rep
609
Posts

 
Drives: 335i Dinan stage 2 / 1 M
Join Date: Mar 2009
Location: Little Rock

iTrader: (0)

Have it pulled and just put it back in if you need to.
__________________
Thanks to: Hixson BMW, Race-Keeper, Koni, BimmerHaus, & Hoosier
2012 SUMMER NATIONALS SCCA PRO-SOLO BONUS CHALLENGE WINNER
2012 SUMMER NATIONALS SCCA PRO-SOLO A STOCK CHAMPION
2012 SCCA DIXIE A STOCK CHAMPION
www.facebook.com/thatsrightracing
Appreciate 0
      11-21-2011, 03:07 PM   #13
EIN M
Second Lieutenant
United_States
4
Rep
280
Posts

 
Drives: BMW 1M
Join Date: Oct 2011
Location: Dallas, TX

iTrader: (0)

+1000 on the CDV delete mod
Appreciate 0
      11-21-2011, 03:53 PM   #14
Fundahl
Captain
United_States
7
Rep
704
Posts

 
Drives: VO 1M, 300zx TT
Join Date: Mar 2011
Location: Corpus Christi, Texas

iTrader: (0)

Does anyone know the actual technical reason BMW put a CDV? I know it reduces drivetrain shock, perhaps helping maintain traction?
Appreciate 0
      11-21-2011, 04:00 PM   #15
Ian///M
Major General
Ian///M's Avatar
No_Country
81
Rep
6,247
Posts

 
Drives: 1M
Join Date: Mar 2011
Location: Melbourne

iTrader: (0)

Quote:
Originally Posted by Fundahl View Post
Does anyone know the actual technical reason BMW put a CDV? I know it reduces drivetrain shock, perhaps helping maintain traction?
Protects the drive-train components and puts more load on the clutch. Drive-shaft & diff are covered by warranty, clutch isn't.
__________________
BMW 1M VO - Cobb + PTF e-Tune, Akrapovic wireless, MadDad mids, ETS 5" FMIC, ER CP, TurboSmart PB DV's, SSK, CDV, OCC, AWRON Gauge, Hankook RS-3's, Vorshlag Camber plates
Appreciate 0
      11-21-2011, 05:21 PM   #16
getmetnow
Private
1
Rep
89
Posts

 
Drives: 2015 M3
Join Date: Jul 2011
Location: Florida

iTrader: (2)

Quote:
Originally Posted by m3kerry View Post
Have it pulled and just put it back in if you need to.
TWSS
Appreciate 0
      11-27-2011, 11:01 PM   #17
CarJunkie
Lieutenant
7
Rep
555
Posts

 
Drives: Valencia Orange 1-Series M
Join Date: Nov 2011
Location: Tri-Cities, Washington

iTrader: (0)

I am still learning the car, but I have not yet noticed anything wrong with the clutch pedal feel. Maybe my driving is just that good!
Appreciate 0
      11-27-2011, 11:20 PM   #18
gazz
///Mbassador
gazz's Avatar
Australia
10
Rep
1,077
Posts

 
Drives: The horse I fell off
Join Date: Apr 2007
Location: Gold Coast Australia

iTrader: (0)

If there is nothing wrong then don't fix it.
Appreciate 0
      11-27-2011, 11:56 PM   #19
Ilia@IND
BMW obsessed
Ilia@IND's Avatar
106
Rep
2,203
Posts

 
Drives: F82 M4
Join Date: Oct 2006
Location: Chicago

iTrader: (3)

The clutch delay valve is part number 13 in this diagram:



Here are a couple great threads on the topic:

http://www.1addicts.com/forums/showt...cdv+delete+diy

http://www.1addicts.com/forums/showthread.php?t=558362

Hope this helps!
__________________
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -5. The time now is 12:30 PM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST