Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

CDV

"M" Specific discussion
Post Reply
Pugwash
Newbie
Newbie
Posts: 5
Joined: Wed Jul 23, 2014 8:47 am

CDV

Post by Pugwash » Wed Oct 11, 2017 5:09 am

Hi there,

Can anyone tell me what is involved in disabling the Clutch Delay Valve on a 2008 Z4M Coupe please? Is it DIY?

Thanks for any help.
Paul
New Zealand
Since Feb 2012: 2008 Z4M Coupe. Alpine white with Silverstone and Anthracite interior.

User avatar
enzed4
Lifer
Lifer
Posts: 3033
Joined: Fri May 16, 2014 9:23 am
Location: New Zealand

CDV

Post by enzed4 » Wed Oct 11, 2017 5:54 am

Very DIY, from the amount of members who have done it. Here's one of many YT videos of it - I'm sure there might be better ones out there
.
Strangely I couldn't find a 'How to' on this forum, only one about modifying it rather than replacing it...?
Image
Gone: 2010 35i DCT
Gone: 2008 2.5Si Sport

Lance
Member
Member
Posts: 973
Joined: Tue Apr 27, 2010 8:04 pm
Location: Northants

CDV

Post by Lance » Wed Oct 11, 2017 7:30 am

I have a 2003 2.5 and removed mine about 5 years ago.

The job itself is very easy, unbolt either end of the CDV, remove and then reconnect the parts you're left with. Bleed the clutch for a few pumps of the pedal (that's what I did) and you're done. It has been a number of years since I did mine, but I'm pretty sure that was all there was to it.

If you have a ramp, it's a 10 minute job. If not it's a bit of a PITA accessing it from under the car, awkward not difficult!

Good luck :thumbsup:

Pugwash
Newbie
Newbie
Posts: 5
Joined: Wed Jul 23, 2014 8:47 am

CDV

Post by Pugwash » Wed Oct 11, 2017 7:33 am

Thanks Enzed and Lance. Looks like my delay valve is coming off. I learned to live with it but don't like it. I'm sure it will be better removed. I can get it on a hoist so should be straightforward.
Paul
New Zealand
Since Feb 2012: 2008 Z4M Coupe. Alpine white with Silverstone and Anthracite interior.

Lance
Member
Member
Posts: 973
Joined: Tue Apr 27, 2010 8:04 pm
Location: Northants

CDV

Post by Lance » Wed Oct 11, 2017 7:36 am

The following is from an old post when I did mine -

A ramp or pit would be perfect, if not, lift from passenger side (UK spec car) remove front wheel, only for extra space and stand placement. Get under car between wheel and jacking point, CDV is sort of directly under the front of the passenger seat, next to the gearbox.

It really is a very straight forward job, but do pinch the clutch hose otherwise it will pi55 fluid.
IIRC, 11mm and 17mm open ended to loosen and remove the CDV which actually sits in little bracket thingy, undo the smaller end first and it'll just spin off by hand. Same spanners to connect the ends you are left with.

Bleed the clutch for a few pumps and you're done.

Pugwash
Newbie
Newbie
Posts: 5
Joined: Wed Jul 23, 2014 8:47 am

CDV

Post by Pugwash » Wed Oct 11, 2017 8:05 am

:thumbsup: Excellent - sounds very straightforward. Did you notice an immediate improvment in the feel of the clutch?
Paul
New Zealand
Since Feb 2012: 2008 Z4M Coupe. Alpine white with Silverstone and Anthracite interior.

Lance
Member
Member
Posts: 973
Joined: Tue Apr 27, 2010 8:04 pm
Location: Northants

CDV

Post by Lance » Wed Oct 11, 2017 8:44 am

I did notice a slight improvement, but not the significant difference some have reported.

Worth doing - yes, would I do it again - yes.

Buddy
Newbie
Newbie
Posts: 20
Joined: Fri Apr 21, 2017 7:39 am

CDV

Post by Buddy » Wed Oct 11, 2017 2:10 pm

It's a must to do it! A clutch which you have control of!

I clamped the hose and then just undid the CDV at both ends and reconnected the line, then took the clamp off and gave the pedal a couple of pumps, my son's girlfriend tried it and guess what my next job was? Same thing done on hers and no need to bleed either system, very easy and well worthwhile if you like a faster gear change.

User avatar
Argenta
Senior Member
Senior Member
Posts: 1051
Joined: Sat Feb 07, 2015 7:49 pm

CDV

Post by Argenta » Wed Oct 11, 2017 2:28 pm

It seems the CDV has a smaller restriction on non-M cars, as I remember it..? At least I did not notice much difference on my M. Possibly a more direct/mechanical feel.

User avatar
RedUn
Senior Member
Senior Member
Posts: 1102
Joined: Sat Jun 16, 2012 7:33 pm
Location: Hertfordshire

CDV

Post by RedUn » Wed Oct 11, 2017 7:58 pm

To give you an idea, this is the cdv off the M...
Attachments
20161106_185846.jpg
20161106_185846.jpg (104.06 KiB) Viewed 1308 times
IMOLA Z4///MR

User avatar
srhutch
Moderator
Moderator
Posts: 26959
Joined: Tue Jun 19, 2007 1:22 pm
Location: East Sussex, UK
Contact:

CDV

Post by srhutch » Wed Oct 11, 2017 8:40 pm

PVR claimed no difference on an ///M. But most I know have done it say it’s much better. I know mine is.
Image

User avatar
RedUn
Senior Member
Senior Member
Posts: 1102
Joined: Sat Jun 16, 2012 7:33 pm
Location: Hertfordshire

CDV

Post by RedUn » Wed Oct 11, 2017 8:43 pm

Mine was lots better too :thumbsup:
IMOLA Z4///MR

User avatar
Fogwan1983
Member
Member
Posts: 51
Joined: Thu Jul 20, 2017 9:19 pm

CDV

Post by Fogwan1983 » Fri Oct 13, 2017 4:05 pm

Done mine over the weekend and noticed the difference. I did drive my 1998 E36 Compact in between though so not sure if that made it feel even better!

Worth doing!

Post Reply