CDV

jparnes1 · 06-07-2017, 10:23 AM

Has anyone done a CDV delete? I want to know if a modified valve is needed or can the stock valve be removed and the inlet and outlet lines be connected together.

paris1 · 06-07-2017, 11:27 AM

I didn't realize E89s had this feature on the 6MT. Why would BMW put this on a car with sporting pretensions?
BTW; why are you just now considering removing it after all these years/miles?

jparnes1 · 06-07-2017, 01:41 PM

Quote:

Originally Posted by paris1

I didn't realize E89s had this feature on the 6MT. Why would BMW put this on a car with sporting pretensions?
BTW; why are you just now considering removing it after all these years/miles?

BMW puts it on all MT cars (not sure about M's).

Vetracr · 06-11-2017, 11:50 AM

You can buy a gutted CDV that replaces factory CDV. You need valve body to connect lines togethet

Bob20124 · 06-11-2017, 12:55 PM

Dummy CDV not needed (plenty of line). remove, reconnect and bleed the slave. I put a pass thru CDV in before I knew how mod friendly my dealer was....

pavproch · 06-12-2017, 02:03 PM

Just do it, tear it off. I did, never regretted. Brings a great deal of predictability, straighness and linearity in clutch behaviour/response.

Omni1234 · 10-09-2017, 07:36 PM

I just removed mine a couple of hours ago, reconnected the hose to the slave and bled. Can't believe how smooth 1st to 2nd shift is now! No more boggle head for the wifey.

On a side note, the CDV off my 2013 Z4 was completely plastic except for the orifice hole. Everything on this car is plastic!

06-07-2017, 10:23 AM	#1
jparnes1 Colonel 242 Rep 2,387 Posts Drives: 2016 340i, 2012 Z4 35i Join Date: Jan 2010 Location: NY iTrader: (1)	CDV Has anyone done a CDV delete? I want to know if a modified valve is needed or can the stock valve be removed and the inlet and outlet lines be connected together. __________________ 2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus. 2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
	Appreciate 0 Tweet Quote

06-07-2017, 11:27 AM	#2
paris1 Captain 90 Rep 745 Posts Drives: 2013 35i Space Grey over Coral Join Date: Oct 2014 Location: Northern Calif. iTrader: (0)	I didn't realize E89s had this feature on the 6MT. Why would BMW put this on a car with sporting pretensions? BTW; why are you just now considering removing it after all these years/miles?
	Appreciate 0 Quote

06-11-2017, 11:50 AM	#4
Vetracr Private First Class 30 Rep 193 Posts Drives: 2010 BMW Z4 3.0 Join Date: Jun 2016 Location: Palm Beach, FL iTrader: (0)	You can buy a gutted CDV that replaces factory CDV. You need valve body to connect lines togethet
	Appreciate 0 Quote

06-11-2017, 12:55 PM	#5
Bob20124 Retired and Enjoying it 52 Rep 170 Posts Drives: 2011 Z4 35i Alpine White 6MT Join Date: Jun 2013 Location: VA iTrader: (0)	Dummy CDV not needed (plenty of line). remove, reconnect and bleed the slave. I put a pass thru CDV in before I knew how mod friendly my dealer was.... __________________ 2011 35i BMS High & Low side OCC, Custom tune, CDV delete, Eldor coils, ER Charge Pipe w/Tial BOV, ER Comp. FMIC, K&N drop in,40W LED Halo, LCI side markers, M-Factory LSD, NGK plugs, Racing Dynamics strut brace, Stubby, Windrestrictor
	Appreciate 0 Quote

06-12-2017, 02:03 PM	#6
pavproch Private First Class 9 Rep 184 Posts Drives: Z4 3.0i & 330ixT Join Date: Aug 2011 Location: CZ iTrader: (0)	Just do it, tear it off. I did, never regretted. Brings a great deal of predictability, straighness and linearity in clutch behaviour/response. __________________ Daily:330ix 6MT - PBX, HR SportSprings, Koni Yellows, OZ Ultraleggera 18", PI+PE, CDV off, UUC sways, M235i SportBrake (front), Cquence rotors (rear), 3.64 diffs, LSD rear Funcar: Z4 3.0i 6MT - HR SportSprings +sways, OZ Ultraleggera 19", 5.00 diff by Drexler, CDV off, Quaife LSD, M235i SportBrake (front), Cquence rotors (rear)
	Appreciate 0 Quote

10-09-2017, 07:36 PM	#7
Omni1234 New Member 0 Rep 14 Posts Drives: 2013 Z4 Join Date: May 2017 Location: Seattle iTrader: (0)	I just removed mine a couple of hours ago, reconnected the hose to the slave and bled. Can't believe how smooth 1st to 2nd shift is now! No more boggle head for the wifey. On a side note, the CDV off my 2013 Z4 was completely plastic except for the orifice hole. Everything on this car is plastic!
	Appreciate 0 Quote