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



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  DIY - E92 CDV (Clutch Delay Valve) Removal
EvanL
09-13-2006
Hey, just removed the CDV from my 335i today. Very straightforward and much simpler than the CDV removal from my E46 M3. Steps are as follows:

1. Jack the front end up and put it on JACK STANDS. Do not get under a car that is supported by a jack only.

2. Remove the...
  #88  
By pikkashoe on 05-01-2007, 05:09 PM
LOL bayern thanks for the update. I have my pressure bleeder on its way to me, cant wait to see the results. I ordered the non premium (bmw) dot 4 brake fluid. =)
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  #89  
By pikkashoe on 05-04-2007, 09:47 PM
Well i took my cdv out tonight, wow what a difference. Its such a nice feeling tranny now. I peeled out from first to second and second to third, never done that before (with DTC completely off). Its hard to describe, but the shifts are much crisper and quicker. Well worth the hassle below.

Of course my pressure bleeder that I ordered from Bav Auto didnt work, it leaked all over the place. So I bled it the old fashion way, under the car while someone pressed the clutch. Now my question is as follows. This is exactly what I did : I had someone press the clutch 5 to 6 times to push the air into the bleed valve, then push it all the way down to the floor and hold it. I would then loosen the bleed valve, and the fluid would spurt out then just trickle out. I did this about 3 times. The first time the pedal would not come up, the second two times, it came up on its own. Does this mean it was done right?

Opening the bleed valve is very very hard, its at such an akward angle and you barely have any room to work with.

I dont remember how the brake pedal felt before, but It sort of feels weird, but the clutch engages just perfect. Could it be just my imagination, or would you definately know something is not right if the clutch/brakes where not bled properly.

EvanL, in your DIY, you say to have someone press the clutch down while you open the bleeder, then close the bleeder before they get down to the bottom. Whats the difference between the way you say to do it, and the way I did it. I went off what was said here in this DIY.

http://www.my330i.com/mod27.php

I also crimped the line as indicated in this DIY. No dripping mess anywhere.

http://www.bmw325i.net/cdv_removal.shtml
Last edited by pikkashoe; 05-04-2007 at 10:11 PM.
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  #90  
By pikkashoe on 05-05-2007, 06:36 PM
Hey guys, I just want to clarify, the pressure bleeder did not work, because there was a seal which fell out and was in the box. Once I put that in, it worked fine. Maybe I will use it next time

Day two of CDV Less shifting, its like a whole new transmission. Its so freaking nice now. Any of you guys on the wire, just do it, you wont regret it.
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  #91  
By topracer on 05-06-2007, 09:43 PM
Quote:
Originally Posted by JKratty View Post
I have a modified CDV on order from Zeckhausen. If we can get a little braintrust together in the DC area, I'd be up for it.
I am in DC and interested in the CDV mod too. Anyone or shop who has done that before?
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  #92  
By psychoactive on 05-10-2007, 04:21 PM
wow! I was wondering why my tranny felt like a piece of poop! I am going to do this tonight!
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  #93  
By MacAttack on 05-10-2007, 05:45 PM
Thx for helping me decide.
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  #94  
By STE92VE on 05-10-2007, 06:06 PM
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Not that I'm about to do a CDV replacement, even though I have the modded valve, where is the master cylinder reservoir in case you need to add hydraulic fliuid? I can see the power steering fill, the oil fill and the windshield washer fill, but don't have a clue where the master cylinder is?
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  #95  
By pikkashoe on 05-10-2007, 08:20 PM
The brake and clutch share the same fluid, so you fill the brake fluid resevoir, which is on the right rear side of the engine bay, if you your standing directly in front of the car, its under a plastic cover by the windshield. I think this what you are asking about. The brake master cylinder sits right below the resevoir.
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  #96  
By pikkashoe on 05-10-2007, 08:21 PM
psychoactive, did you take the cdv out, let me know how it feels now!
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  #97  
By daves335i on 05-11-2007, 07:33 AM
Quote:
Originally Posted by pikkashoe View Post
psychoactive, did you take the cdv out, let me know how it feels now!
I did the mod, and its *great*!!!

A friend with a 328xi said "I don't think I know how to drive a manual anymore, it seems.

Drove 5 seconds in my car, and then said "I gotta get this done!".

do it.
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  #98  
By pikkashoe on 05-11-2007, 12:25 PM
Im going to help someone do their's on their 328 too.
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  #99  
By ducati955 on 05-13-2007, 10:03 PM
so as long as i follow these directions on pg 1 i'm good to go? do i need to buy a modified valve or something (sorry, i did read this posts, just a lil lost)
i def need to do this!
thanx!
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  #100  
By STE92VE on 05-13-2007, 10:09 PM
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Quote:
Originally Posted by ducati955 View Post
so as long as i follow these directions on pg 1 i'm good to go?
i def need to do this!
Let me know when you're ready to do yours.....I already have the modified CDV but holding off on replacing it until I can't take the vagueness in the clutch anymore.
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  #101  
By skim7x on 05-14-2007, 12:43 AM
so you all are saying the CDV protects form "noob" driving...

I have about 6 years of manual experience under my belt... so I know how to drive a stickshift... but when I launched with my G35, I would drop it around 3.5krpm... I assume if I did the same thing in a 335i w/ CDV removed, it would be bad for the transmission?

am I still classified under n00b status (ie. I should keep m CDV in? haha)?
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  #102  
By topher04r1 on 05-14-2007, 09:56 AM
what sort of brake fluid did you guys use ?
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  #103  
By pikkashoe on 05-14-2007, 10:14 AM
I ordered the $2.99 fluid from Bav Auto. Just get any DOT4 rated fluid.
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  #104  
By ducati955 on 05-14-2007, 10:49 AM
Quote:
Originally Posted by STE92VE View Post
Let me know when you're ready to do yours.....I already have the modified CDV but holding off on replacing it until I can't take the vagueness in the clutch anymore.
i'm not gonna rush it, but i will def let ya know when i do, i really need to drive this car!
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  #105  
By CASHBY on 05-14-2007, 11:33 AM
Did this over the weekend.... by far worth the 10 minute DIY.

Also just a note, I crimped the line and zero amount of Fluid came out and I did not have to bleed the clutch at all. It felt exactly how it did before so that saved me some time on the job.

car feels good, shifts normal!
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  #106  
By pikkashoe on 05-14-2007, 12:20 PM
Nice, I crimped my line too, but just to be safe I bled mine as well.

Not sure if I did it right, but everything works fine. BRakes feel the same as before.

Best 10 minute DIY you can do.
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  #107  
By cheluto2 on 05-15-2007, 09:57 PM
what about warranty issues? i read somewhere it is easy to put bak on, correct?

Quote:
Originally Posted by pikkashoe View Post
Nice, I crimped my line too, but just to be safe I bled mine as well.

Not sure if I did it right, but everything works fine. BRakes feel the same as before.

Best 10 minute DIY you can do.
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  #108  
By pikkashoe on 05-15-2007, 10:13 PM
Cheluto, it would take literally 10 minutes to put back on.
You crimp the line, pull the clip out holding the clutch line in place, slide the old valve back on and put the two clips back on. Done. The time consuming part is removing the 8 bolts that hold the cover in place.
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  #109  
By CASHBY on 05-17-2007, 11:56 AM
putting the stock on one is like putting the aftermarket on....it literally the same exact install job.
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