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

RaptorKTM · 11-20-2011, 10:38 PM

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.

ZCP M3 · 11-20-2011, 10:49 PM

You need to remove the Clutch Delay Valve (CDV) and bleed the clutch. It's between the clutch line and the slave cylinder.

m3kerry · 11-20-2011, 10:49 PM

Quote:

Originally Posted by RaptorKTM

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.

RaptorKTM · 11-20-2011, 11:28 PM

Ok, could you by chance post a link to this, or is this something that the dealer can do?

AM1N · 11-20-2011, 11:42 PM

Quote:

Originally Posted by RaptorKTM

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.

RaptorKTM · 11-21-2011, 12:05 AM

ouch

m3kerry · 11-21-2011, 06:59 AM

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.

gazz · 11-21-2011, 08:09 AM

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.

MusclezMarinara · 11-21-2011, 10:20 AM

CDV DELETE

torquedemon · 11-21-2011, 10:31 AM

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...

MDORPHN · 11-21-2011, 10:38 AM

Quote:

Originally Posted by torquedemon

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

m3kerry · 11-21-2011, 02:28 PM

Have it pulled and just put it back in if you need to.

EIN M · 11-21-2011, 03:07 PM

+1000 on the CDV delete mod

Fundahl · 11-21-2011, 03:53 PM

Does anyone know the actual technical reason BMW put a CDV? I know it reduces drivetrain shock, perhaps helping maintain traction?

Ian///M · 11-21-2011, 04:00 PM

Quote:

Originally Posted by Fundahl

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.

getmetnow · 11-21-2011, 05:21 PM

Quote:

Originally Posted by m3kerry

Have it pulled and just put it back in if you need to.

TWSS

CarJunkie · 11-27-2011, 11:01 PM

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!

gazz · 11-27-2011, 11:20 PM

If there is nothing wrong then don't fix it.

Ilia@IND · 11-27-2011, 11:56 PM

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!

11-20-2011, 10:38 PM	#1
RaptorKTM Colonel Drives: 1 M Coupe Join Date: Apr 2006 Location: San Diego Posts: 2,366 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.
	Tweet

11-21-2011, 06:59 AM	#7
m3kerry SCCA STU Drives: 335i Dinan stage 2 / 1 M Join Date: Mar 2009 Location: Little Rock Posts: 562 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

11-21-2011, 02:28 PM	#12
m3kerry SCCA STU Drives: 335i Dinan stage 2 / 1 M Join Date: Mar 2009 Location: Little Rock Posts: 562 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

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11-20-2011, 10:49 PM	#2
ZCP M3 First Lieutenant Drives: 2011 VO 1M Coupe #759 Join Date: Jul 2011 Location: St. Louis, MO Posts: 384 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.

11-20-2011, 11:28 PM	#4
RaptorKTM Colonel Drives: 1 M Coupe Join Date: Apr 2006 Location: San Diego Posts: 2,366 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?

11-21-2011, 12:05 AM	#6
RaptorKTM Colonel Drives: 1 M Coupe Join Date: Apr 2006 Location: San Diego Posts: 2,366 iTrader: (1) Garage List 2011 BMW 1 M [0.00]	ouch

11-21-2011, 08:09 AM	#8
gazz ///Mbassador Drives: The horse I fell off Join Date: Apr 2007 Location: Gold Coast Australia Posts: 1,049 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.

11-21-2011, 10:20 AM	#9
MusclezMarinara Banned Drives: VALNCYA Join Date: Jan 2009 Location: Jersey Posts: 5,026 iTrader: (23) Garage List 2011 BMW 1M [5.00] 2009 335i Sedan xdrive [4.67]	CDV DELETE

11-21-2011, 10:31 AM	#10
torquedemon First Lieutenant Drives: 1M Join Date: Apr 2011 Location: Earth Posts: 389 iTrader: (0) Garage List 2011 BMW 1 Series M ... [0.00]	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...

11-21-2011, 03:07 PM	#13
EIN M Second Lieutenant Drives: BMW 1M Join Date: Oct 2011 Location: Dallas, TX Posts: 218 iTrader: (0)	+1000 on the CDV delete mod

11-21-2011, 03:53 PM	#14
Fundahl Captain Drives: VO 1M, 300zx TT Join Date: Mar 2011 Location: Corpus Christi, Texas Posts: 705 iTrader: (0)	Does anyone know the actual technical reason BMW put a CDV? I know it reduces drivetrain shock, perhaps helping maintain traction?

11-27-2011, 11:01 PM	#17
CarJunkie Lieutenant Drives: Valencia Orange 1-Series M Join Date: Nov 2011 Location: Tri-Cities, Washington Posts: 452 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!

11-27-2011, 11:20 PM	#18
gazz ///Mbassador Drives: The horse I fell off Join Date: Apr 2007 Location: Gold Coast Australia Posts: 1,049 iTrader: (0)	If there is nothing wrong then don't fix it.

11-27-2011, 11:56 PM	#19
Ilia@IND Lieutenant Colonel Drives: 08 Alpine M3 Join Date: Oct 2006 Location: Chicago Posts: 1,930 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!