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      05-07-2012, 09:06 AM   #23
elerner61
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Removed the CDV yesterday. I definitely notice a difference, IT DRIVES NORMALLY NOW.

Seriously though, it's like the difference between when you tell someone else how to make your coffee for you and when you make it for yourself. Without the CDV it's the way it should be and always has been in other cars.
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      05-07-2012, 09:19 AM   #24
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Quote:
Originally Posted by elerner61 View Post
Removed the CDV yesterday. I definitely notice a difference, IT DRIVES NORMALLY NOW.

Seriously though, it's like the difference between when you tell someone else how to make your coffee for you and when you make it for yourself. Without the CDV it's the way it should be and always has been in other cars.
Welcome to the enlightened group that no longer feel like embarrassed 'clutch idiots'...
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      05-08-2012, 03:10 PM   #25
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Quote:
Originally Posted by onebluemcm View Post
I don't get the argument that they put it in there to "protect" the drive train and suspension unless BMW is pretentious enough to think their customers buying manual trans cars can't drive them..
It's all about the $$$. When your car is under warranty, and repairs are on their dime, then having a CDV makes sure the thing that fails due to crappy driver (the clutch) is something that is an exempt "wear item" like brake pads, and thus costs them nothing. Without a CDV, the thing that a crappy driver damages first is expensive driveline components that would be covered under warranty.

BMW is still independent, not owned by anyone else, and they remain very profitable. No bailouts needed for them. You dont get that way, and stay that way, by making dumb financial choices.
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      05-08-2012, 10:41 PM   #26
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Except that the clutch (disk) is covered in the maintenance plan which runs the same duration and mileage as the warranty.
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      05-09-2012, 10:59 AM   #27
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Its wasnt as drastic of a change as some have described for me but its definitely worth doing
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      05-04-2013, 03:11 PM   #28
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I was always the hold out that argued for keeping the CDV in the interest of safety.

Just got deleting it today, I HOPE YOU GUYS ARE HAPPY
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      05-04-2013, 10:46 PM   #29
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Quote:
Originally Posted by beta
I was always the hold out that argued for keeping the CDV in the interest of safety.

Just got deleting it today, I HOPE YOU GUYS ARE HAPPY
Bloody finally
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      05-04-2013, 11:26 PM   #30
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Originally Posted by beta View Post
I was always the hold out that argued for keeping the CDV in the interest of safety.

Just got deleting it today, I HOPE YOU GUYS ARE HAPPY


Well? Impressions?
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      05-05-2013, 02:19 PM   #31
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Quote:
Originally Posted by Finnegan View Post
Well? Impressions?
It feels great, I love the change. With the SSK + pulling left on 1->2 shifting is such a pleasure now.

I always knew it would feel better without the cdv; my concern was wear and tear on the car since BMW claims they added it to reduce drivetrain shock.

After thinking about it, so many people have removed it from both this car and the e46m, and after this many years (6+ for this car, 12+ for the m3) I still haven't come across a thread with drivetrain damage. I wonder if BMW added it as an anti-hooning measure, rather than a real longevity concern.
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      05-05-2013, 02:32 PM   #32
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Quote:
Originally Posted by beta View Post
It feels great, I love the change. With the SSK + pulling left on 1->2 shifting is such a pleasure now.

I always knew it would feel better without the cdv; my concern was wear and tear on the car since BMW claims they added it to reduce drivetrain shock.

After thinking about it, so many people have removed it from both this car and the e46m, and after this many years (6+ for this car, 12+ for the m3) I still haven't come across a thread with drivetrain damage. I wonder if BMW added it as an anti-hooning measure, rather than a real longevity concern.
Hahah...bout time man. Hopefully you driving my car helped push you in the right direction...
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      05-05-2013, 03:58 PM   #33
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Quote:
Originally Posted by gferil View Post
Hahah...bout time man. Hopefully you driving my car helped push you in the right direction...
Now that I think about it, that's exactly what did it. After driving your car it was hard to go back.

It's probably like the electric steering of the non-M. When I had my first Z4 I didn't mind the electric steering at all. But after owning the M for a while, I realized how much, in retrospect, I hated the electric steering. When you don't know better the little annoyances are easily dismissed. Once you know better, they're insurmountable first world problems

Your clutch is still much shorter/harder than mine, I wonder if it's a coupe/roadster difference (since you guys also got the shorter steering lock + stiffer suspension), or just a car/car difference.

Your car also sold me on an exhaust. I don't think I can go quite as loud as you, but it sounds amazing!
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      05-05-2013, 05:12 PM   #34
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Late to the party but $.02

There is no mastering of the clutch with a CDV installed.
The removal is a no brainer mod.
Especially to lifelong experienced MT drivers

Of course, as always, IMHO
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      05-06-2013, 03:20 PM   #35
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Did anyone have problems bleeding their clutch after the CDV delete? This weekend I installed a Rogue SS clutch line (and removed the CDV), plus I installed Stoptech SS brake lines.

I had just enough fluid to bleed everything. My brake pedal felt good with the car still on jackstands, but the clutch pedal drops straight to the floor. Now I'm waiting for more ATE super blue fluid to arrive while I wonder if I just need to bleed the clutch again, or if I've got bigger problems.

I hope I don't have to remove the slave cylinder and buy one of those slave cylinder bleeding tools. It looked like removing the slave would be a tight fit.
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      05-06-2013, 03:33 PM   #36
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I did the CDV delete a few years ago and it it changed things to where I thought it should be.
I then bought the UUC clutch stop kit recently and it was again a nice adjustment in user friendly tweaks.
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      05-06-2013, 09:01 PM   #37
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Quote:
Originally Posted by DanFromTucson View Post
Did anyone have problems bleeding their clutch after the CDV delete? This weekend I installed a Rogue SS clutch line (and removed the CDV), plus I installed Stoptech SS brake lines.

I had just enough fluid to bleed everything. My brake pedal felt good with the car still on jackstands, but the clutch pedal drops straight to the floor. Now I'm waiting for more ATE super blue fluid to arrive while I wonder if I just need to bleed the clutch again, or if I've got bigger problems.

I hope I don't have to remove the slave cylinder and buy one of those slave cylinder bleeding tools. It looked like removing the slave would be a tight fit.
It is pretty easy to remove the slave cylinder to bleed it vertically. instead of the special tool, all you need is a piece of steel strapping or Dexion or similar, together with two nuts and bolts of the right length to allow the piston to be compressed by placing the strapping across the top of the piston and the bolts through both the cylinder mounting holes and holes in the strapping.
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      05-07-2013, 10:11 AM   #38
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Quote:
Originally Posted by aerobod View Post
It is pretty easy to remove the slave cylinder to bleed it vertically. instead of the special tool, all you need is a piece of steel strapping or Dexion or similar, together with two nuts and bolts of the right length to allow the piston to be compressed by placing the strapping across the top of the piston and the bolts through both the cylinder mounting holes and holes in the strapping.
Thanks for the reply! I'll give that a try if a secondary bleed doesn't work.
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      09-03-2015, 08:39 AM   #39
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This is the most recent thread I found on the topic.

My Indy shop replaced the stock slave cylinder line with a SS line last week and in the process the CDV was removed. It's in a plastic bag on my workbench where it belongs IMESHO. Good riddance! I can shift smoothly again.
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      09-03-2015, 10:20 AM   #40
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If my CDV is gone, would the Z4 be a bad car to use for re-teaching my wife how to drive stick? Shoulda taught her before deleting it!
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      09-03-2015, 11:14 AM   #41
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Quote:
Originally Posted by Twixboy
If my CDV is gone, would the Z4 be a bad car to use for re-teaching my wife how to drive stick? Shoulda taught her before deleting it!
I think My Z4 clutch is very easy to use. That said a CDV might be friendlier for your car with a newbie at the controls.
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      11-27-2015, 07:51 AM   #42
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I just acquired my Z4M this summer. My first impression was that the clutch release was kind of Numb. This is my first BMW so I figured it was as design for "comfort", Which seemed odd for an ///M. A greater concern was when I was putting my foot into the accelerator when going into 2nd gear, it always feels like the clutch is slipping. Well, Come to learn of the CDV, I guess it is slipping. I can't wait to get under the car and pull it out!
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      11-27-2015, 04:34 PM   #43
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The engagement of the clutch is much faster without the CDV. CDV and an activated sport button will shred that clutch of yours so fast if you're not used to it.
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      12-04-2016, 05:24 PM   #44
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I've been driving my 06 Z4M for two weeks now. The clutch makes me feel like I nearly never quite get it right, but then I do a smooth quick shift and I think it's me, I need to just keep getting used to this. Now I'm convinced it's gotta go.....Question, where do I get the "regular " valve ? Parts store could not find it on their computer today. Or is it " better " to just take it out, connect line straight in ?
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