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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Clutch Delay Valve



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      05-09-2005, 07:23 PM   #1
segfault
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Clutch Delay Valve

Does anyone know if the E90 includes the notorious BMW Clutch Delay Valve (CDV)? I assume that, if it does, there will be a mod kit to remove it.
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      05-09-2005, 07:51 PM   #2
BMWAustin
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I don't think so, atleast it is not mentioned any where in the manuals.
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      05-10-2005, 04:54 AM   #3
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Yes, it does have it
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      05-10-2005, 09:08 PM   #4
YYdoodle
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What does a clutch delay valve do and why is it notorious? Thanks.
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      05-10-2005, 09:37 PM   #5
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This page does a good job describing what the infamously hated CDV is, what it does, and will convince you to remove it

http://www.zeckhausen.com/CDV.htm
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      05-10-2005, 10:53 PM   #6
segfault
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I e-mailed Zeckhausen to ask if they plan on offering a CDV modification service for the E90, and will post their response here when I receive word.
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      05-10-2005, 11:45 PM   #7
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I'm assuming this CDV thing only applies to cars with manual transmissions, right?
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      05-11-2005, 12:27 AM   #8
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No wonder when I was test driving it was hard to gauge the gas/clutch ratio. I thought it was just because I was use to a racing clutch that catches right away, but if this will happen even later on, I would definitely want this removed.
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      05-11-2005, 11:30 AM   #9
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I will definitly be removing/modifiying it. Does anyone know if a different valve will be required for the E90?
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      05-11-2005, 11:47 AM   #10
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The E90 valve looks very different from the E46 one, its much larger and also mounts to the body
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      05-11-2005, 11:53 AM   #11
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Had my dealer take a screenshot and email it to me

The CDV is No 13
And mounts to the body with no 12
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      05-11-2005, 11:55 AM   #12
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Thanks for the illustration - very clear.

DOes changing the CDV out void the warranty in any way? If I have transmission problems at 25k, are they going to try and blame it on this valve not being there?
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      05-11-2005, 12:43 PM   #13
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Do cars with Steptronic transmissions be affected by this CDV?
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      05-11-2005, 01:03 PM   #14
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Quote:
Originally Posted by RedStripe
Do cars with Steptronic transmissions be affected by this CDV?
No it only on manuals
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      05-11-2005, 01:04 PM   #15
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Quote:
Originally Posted by pete330
Thanks for the illustration - very clear.

DOes changing the CDV out void the warranty in any way? If I have transmission problems at 25k, are they going to try and blame it on this valve not being there?
I do know BMW here has refused to fix problems on some peoples cars due to the valve being removed
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      05-11-2005, 01:49 PM   #16
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In the US I havent heard about anyone having service refused because of this. In fact, I'd be really impressed if any of the dealers even noticed it was missing. Its so tiny and hard to tell its there, unless you are specifically looking for it.
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      05-11-2005, 04:01 PM   #17
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Quote:
Originally Posted by MarkE90M3
In the US I havent heard about anyone having service refused because of this. In fact, I'd be really impressed if any of the dealers even noticed it was missing. Its so tiny and hard to tell its there, unless you are specifically looking for it.
I meant fix it free under warranty

They actually look for it because they know it is removed
The E90 one doesnt look like it can be removed as it attaches the 2 lines together
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      05-11-2005, 10:31 PM   #18
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Zeckhausen says they don't have a part number for it yet, but once they do, they plan on developing a mod service, and plan to update their website in the next couple of months.

E90fleet,
Despite the screw-the-customer attitude of many of the dealers here in the US, it's surprising that they would notice such a small detail, unless they were instructed to look for it by BMWNA.
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      05-12-2005, 02:45 AM   #19
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Quote:
Originally Posted by segfault
Zeckhausen says they don't have a part number for it yet, but once they do, they plan on developing a mod service, and plan to update their website in the next couple of months.

E90fleet,
Despite the screw-the-customer attitude of many of the dealers here in the US, it's surprising that they would notice such a small detail, unless they were instructed to look for it by BMWNA.

The dealers here are instructed to look for it when looking at certain clutch related problems, but probably wont see it in normal servicing
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      05-12-2005, 03:31 AM   #20
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Part No of the CDV is 21526764872 and itīs less than 5 bucks.

May the drilling begin...
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      05-12-2005, 04:10 AM   #21
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Quote:
Originally Posted by Tierfreund
Part No of the CDV is 21526764872 and itīs less than 5 bucks.

May the drilling begin...
Please remember thats for LHD only, RHD ones have a diferent number
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      05-12-2005, 09:51 PM   #22
segfault
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Quote:
Originally Posted by Tierfreund
Part No of the CDV is 21526764872 and itīs less than 5 bucks.

May the drilling begin...
I e-mailed Zeckhausen with the above part number and informed him of our discussion here. Thanks, Tierfreund!
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