E90Post
 


N54Tuning.com
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > DIY - E92 CDV (Clutch Delay Valve) Removal



Reply
 
Thread Tools Search this Thread
      09-14-2006, 04:29 PM   #23
longtran
Moderator
longtran's Avatar
565
Rep
16,615
Posts

Drives: E90 M3
Join Date: Jul 2005
Location: CA

iTrader: (105)

Garage List
2006 325i  [0.00]
damn..can you do mine???
Appreciate 0
      09-14-2006, 07:49 PM   #24
EvanL
Private
United_States
11
Rep
56
Posts

Drives: 335i Coupe
Join Date: Sep 2006
Location: Madison, WI

iTrader: (1)

Quote:
Originally Posted by longtran
damn..can you do mine???
If you ever happen to be in central Missouri, let me know!

Seriously, though, it's pretty easy. If you have jack stands and a good jack, it should only take you 20-30 minutes to perform. Oh, and be sure to have a friend there to help you bleed the clutch.

-Evan
__________________
335i Coupe - Space Grey/Coral Red
Appreciate 0
      09-14-2006, 10:13 PM   #25
EvanL
Private
United_States
11
Rep
56
Posts

Drives: 335i Coupe
Join Date: Sep 2006
Location: Madison, WI

iTrader: (1)

Quote:
Originally Posted by petesamprs
I believe the CDV actually protects the transmission at the expense of the clutch, by slowing the linkup between the engine and tranny. So it's more to protect noobs from destroying the rest of the tranny by resulting in slower clutch linkage (more friction wear) if you try to drop the clutch at 6k RPM.
The purpose of the CDV is to prevent shock on the driveline from someone dropping the clutch too quickly. If you'll notice, BMW runs significantly smaller (and therefore less rotational inertia) driveshafts than almost all other car manufacturers. These driveshafts can break if they're abused all the time by a moron. This is also the purpose of the guibo (or flexdisc) that is installed between the transmission and the driveline. Lessen the driveline shock.

-Evan
__________________
335i Coupe - Space Grey/Coral Red
Appreciate 0
      09-26-2006, 04:50 PM   #26
18LLC
Major General
82
Rep
5,104
Posts

Drives: e89
Join Date: Oct 2005
Location: California

iTrader: (0)

where can i add the clutch fluid? and how come i can't bleed the air out? i have been tried 30 minutes already, still feels nothing. helppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11
__________________
Appreciate 0
      09-26-2006, 05:10 PM   #27
EvanL
Private
United_States
11
Rep
56
Posts

Drives: 335i Coupe
Join Date: Sep 2006
Location: Madison, WI

iTrader: (1)

Quote:
Originally Posted by 18LLC
where can i add the clutch fluid? and how come i can't bleed the air out? i have been tried 30 minutes already, still feels nothing. helppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11
The clutch circuit uses the same fluid as the brake circuit, so just add fluid to the brake fluid reservior.

To bleed the clutch, first pump the clutch pedal a few times to work the air through the system. Then, with a friend in the driver's seat, have them start with the clutch pedal fully extended, and open the bleed valve (circled below in red). Be sure to close the bleed valve before he reaches the floor of the clutch travel, and CLOSE THE BLEED VALVE before he pulls the clutch pedal back up. Note that they probably will have to pull it back up by hand.

Repeat this process a few times, and you'll be good. Oh, and the spot where the CDV originally was is pointed to by the green arrow.

Name:  IMG_0608.edit.JPG
Views: 11695
Size:  87.4 KB
__________________
335i Coupe - Space Grey/Coral Red
Appreciate 0
      09-26-2006, 05:11 PM   #28
EvanL
Private
United_States
11
Rep
56
Posts

Drives: 335i Coupe
Join Date: Sep 2006
Location: Madison, WI

iTrader: (1)

Also note that the bleed valve will have a rubber cap over it that is not shownin the photo.

-Evan
__________________
335i Coupe - Space Grey/Coral Red
Appreciate 0
      09-26-2006, 05:12 PM   #29
F32Fleet
BMWCCA since '03
F32Fleet's Avatar
United_States
248
Rep
6,006
Posts

Drives: 2015 435i
Join Date: May 2005
Location: Southeastern US

iTrader: (0)

Quote:
Originally Posted by BeeEmDubU
so what are the downsides then?
Possible problem with warranty claim.
Appreciate 0
      09-26-2006, 06:45 PM   #30
tiga901
Second Lieutenant
tiga901's Avatar
5
Rep
244
Posts

Drives: e90 330i, mt pp sp
Join Date: Sep 2005
Location: Millbrae, CA

iTrader: (0)

Quote:
Originally Posted by Neurorad
Has anybody had any mechanical problems after modding/replacing the CDV?

The Zeckhausen web page stated the e39 M5 didn't come with this CDV. Why does BMW put this in newer M3 and M5 cars?

I ahve mine for 9 months now and has not have any clutch related problem. If you are a noob using an MT, do not do this mod!!!!
__________________
CDV mod, OEM BMW Strut Bar, OEM Aluminum Pedals, OEM Short Shift Knob, OEM Alarm, Rear Fog Lights, Rear Power Outlets

Next mod...Intake(Dinan or Gruppe M), Rogue SSK
Appreciate 0
      09-26-2006, 07:35 PM   #31
18LLC
Major General
82
Rep
5,104
Posts

Drives: e89
Join Date: Oct 2005
Location: California

iTrader: (0)

sh*t, i fully follow the instruction, still not working for me. i have 2 cars in the same shop at the same time now. fu*k. no fun.
__________________
Appreciate 0
      09-26-2006, 08:46 PM   #32
18LLC
Major General
82
Rep
5,104
Posts

Drives: e89
Join Date: Oct 2005
Location: California

iTrader: (0)

finally, my car got fix. will pick up half hour later.
__________________
Appreciate 0
      09-26-2006, 10:06 PM   #33
18LLC
Major General
82
Rep
5,104
Posts

Drives: e89
Join Date: Oct 2005
Location: California

iTrader: (0)

WOW, what can i said?! amazing. so smooth. thx for the help, man btw, this part, looks different in my car. maybe e90 and e92 is different? or maybe is because mine is xi? i didn't take pic of mine...
Attached Images
 
__________________

Last edited by 18LLC; 09-27-2006 at 12:37 PM.
Appreciate 0
      09-27-2006, 05:44 PM   #34
EvanL
Private
United_States
11
Rep
56
Posts

Drives: 335i Coupe
Join Date: Sep 2006
Location: Madison, WI

iTrader: (1)

Quote:
Originally Posted by 18LLC
WOW, what can i said?! amazing. so smooth. thx for the help, man btw, this part, looks different in my car. maybe e90 and e92 is different? or maybe is because mine is xi? i didn't take pic of mine...
Hard to say why they're different. Most likely due to the different motor/tranny combination or (less likely) the all-wheel-drive system.

Honestly though, I'm not sure what all that tubing is doing there in the first place anyhow. Best I can think of is to keep the hot fluid from reaching the rubber clutch line and therefore expanding it. Now that I say that...it actually makes quite a bit of sense.

-Evan
__________________
335i Coupe - Space Grey/Coral Red
Appreciate 0
      09-29-2006, 01:35 PM   #35
blox
New Member
0
Rep
21
Posts

Drives: 2006 330xi
Join Date: Jun 2006
Location: Massachusetts

iTrader: (0)

I have a 2006 330xi.

I took a look at my CDV with the intention of pulling it out, but I was concerned about the lack of slack in the hose. I have a picture below of the hose -- looks like a tight turn already leading up to the CDV.

Am I right to assume we pull the two clips that I circled in red, and then pop the plastic part out and reconnect?

I think I will order a cleaned out one and replace rather than remove.
Attached Images
  

Last edited by blox; 09-29-2006 at 04:00 PM.
Appreciate 0
      09-29-2006, 03:50 PM   #36
bavarian19
General
bavarian19's Avatar
United_States
290
Rep
18,858
Posts

Drives: Car
Join Date: Mar 2005
Location: VA

iTrader: (23)

I would love to do this mod. Where can you purchase the modified CDV for the E90?

I would also need the trusty hands of an experienced CDV-deleter...
Appreciate 0
      09-29-2006, 03:51 PM   #37
shimshimhada
Brigadier General
shimshimhada's Avatar
United_States
166
Rep
4,838
Posts

Drives: Portal
Join Date: Jul 2005
Location: Portal

iTrader: (2)

Quote:
Originally Posted by bavarian19
I would love to do this mod. Where can you purchase the modified CDV for the E90?

I would also need the trusty hands of an experienced CDV-deleter...
http://www.zeckhausen.com/CDV.htm
Appreciate 0
      09-29-2006, 04:01 PM   #38
bavarian19
General
bavarian19's Avatar
United_States
290
Rep
18,858
Posts

Drives: Car
Join Date: Mar 2005
Location: VA

iTrader: (23)

Quote:
Originally Posted by shimshimhada

have you installed a modified CDV???
Appreciate 0
      09-29-2006, 04:11 PM   #39
shimshimhada
Brigadier General
shimshimhada's Avatar
United_States
166
Rep
4,838
Posts

Drives: Portal
Join Date: Jul 2005
Location: Portal

iTrader: (2)

Quote:
Originally Posted by bavarian19
have you installed a modified CDV???
I assisted someone install my modified CDV.

It's actually pretty simple, I thought it would be hard. You just have to crimp the rubber hose, so brake fluid doesn't gush out. I got some in my eye. lol
Appreciate 0
      10-04-2006, 05:42 PM   #40
blox
New Member
0
Rep
21
Posts

Drives: 2006 330xi
Join Date: Jun 2006
Location: Massachusetts

iTrader: (0)

Got my modified CDV and popped it in yesterday. Very easy.

Nice smooth clutch action now!
Appreciate 0
      12-04-2006, 06:06 PM   #41
hammyoni
Private
1
Rep
62
Posts

Drives: 330i
Join Date: Dec 2006
Location: middy

iTrader: (0)

anyone do this on a e90 without getting a modified CDV? wondering if there is enough slack to stretch without the CDV there
Appreciate 0
      12-04-2006, 08:59 PM   #42
18LLC
Major General
82
Rep
5,104
Posts

Drives: e89
Join Date: Oct 2005
Location: California

iTrader: (0)

Quote:
Originally Posted by hammyoni
anyone do this on a e90 without getting a modified CDV? wondering if there is enough slack to stretch without the CDV there
i put nothing there. should be okay.
__________________
Appreciate 0
      12-04-2006, 11:20 PM   #43
txusa03
Major General
224
Rep
6,567
Posts

Drives: TS330iPPSP6MT
Join Date: Jul 2005
Location: Planet Earth

iTrader: (3)

Evan, nice photos. being a noob manual driver (only 2 years manaual), I like to drive someone's car without the CDV before I terminate my CDV. Anyone in htown that removed their CDV would take me up on a test drive (lol)...
__________________
under construction!
Appreciate 0
      12-06-2006, 02:31 AM   #44
Ray
Member
Ray's Avatar
255
Rep
22,825
Posts

Drives: three series
Join Date: Aug 2006
Location: sfCA

iTrader: (0)

Quote:
Originally Posted by shimshimhada
I highly recommend this modified CDV, which will fool all mechanics.

A local dealership voided my friend's (E46) transmission warranty after discovering the CDV was removed. This DIY is apparently very common with many M3's that visit their service station. Many of them probably had a CDV removal meet or something.
Appreciate 0
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 -4. The time now is 02:39 PM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, 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