[dbogner10]

Thoughts on the clutch delay valve (CDV).. As well as the BMS Modified Clutch Valve.??? Purchased the BMS modified clutch valve, waiting for it to be shipped...was cheap so may aswell get it..

[tibra1]

Originally Posted by dbogner10

Thoughts on the clutch delay valve (CDV).. As well as the BMS Modified Clutch Valve.??? Purchased the BMS modified clutch valve, waiting for it to be shipped...was cheap so may aswell get it..

CDV is a great mod..get rid of the 1-2 shift jerkiness...i did w a short shift kit and it transformed the shifting..

[dbogner10]

http://www.burgertuning.com/trans.html

i got this one...

[tibra1]

$20..good deal..i paid 26...all it is a hollowed out OEM CDV..this a great mod for the value..saves ur clutch too.

[dbogner10]

thanks alot really appreciate it!!

[ttbmer]

Just delete it. No need to put one in place.

[tibra1]

Originally Posted by ttbmer

Just delete it. No need to put one in place.

Yea u could do that..but then u gotta stretch the metal lines and chance breaking em..the modified one works just fine.

[sourphish]

My modified one still gets jerky 1-2 shifts occasionally. I probably just suck at driving haha. Any specific differences between different CDV brands? I got mine from BavX but don't know what they gave me actually.

[tibra1]

Yea its not a complete cure all but i could def feel reduced jerkiness on the 1-2 w/ the modified CDV..Its the nature of the gear box and clutch engagement on this car..dont be afraid to man handle it..lol

[bahn stormer]

You can also buy an OEM CDV and just pop out the orifice with an allen wrench. That is what the majority of vendors are doing and then marking up the price.

Part #13 ($8.27):
http://www.realoem.com/bmw/showparts...08&hg=21&fg=10

[tibra1]

Originally Posted by bahn stormer

You can also buy an OEM CDV and just pop out the orifice with an allen wrench. That is what the majority of vendors are doing and then marking up the price.

Part #13 ($8.27):
http://www.realoem.com/bmw/showparts...08&hg=21&fg=10

Not worth it for $20..u actually have to be careful if u drill it there is a way u can damage it..

http://www.zeckhausen.com/CDV.htm

The solution is to replace* the CDV with a modified valve which has had the interior parts carefully removed. We do not drill these valves. Drilling will damage the taper at both ends of the valve. The male tapered end seals against the female taper of the clutch slave cylinder. And the male hydraulic fitting seals against the CDV's tapered seat at the female end. It does not seal via the threads.

Drilling a CDV will cause it to leak and may also leave bits of metal behind, potentially damaging the delicate rubber seals in the clutch hydraulics. We have developed a technique for removing the interior valve and spring without damaging the tapered seat at the female end and without touching the taper on the male end. .

[kdiggz]

u don't drill it, u pop it out with an allen wrench as explained above

[Kevin@AKMotorwerk]

Originally Posted by tibra1

Not worth it for $20..u actually have to be careful if u drill it there is a way u can damage it..

http://www.zeckhausen.com/CDV.htm

The solution is to replace* the CDV with a modified valve which has had the interior parts carefully removed. We do not drill these valves. Drilling will damage the taper at both ends of the valve. The male tapered end seals against the female taper of the clutch slave cylinder. And the male hydraulic fitting seals against the CDV's tapered seat at the female end. It does not seal via the threads.

Drilling a CDV will cause it to leak and may also leave bits of metal behind, potentially damaging the delicate rubber seals in the clutch hydraulics. We have developed a technique for removing the interior valve and spring without damaging the tapered seat at the female end and without touching the taper on the male end. .

they are referring to the e46 style that needs to be drilled, the e9x ones are plastic, and the restriction plate is just held in place by spring force from 4 fingers on it, so it just pops out, blow it out with some air just for safe measure and its ready to go

[Joshboody]

Originally Posted by bahn stormer

You can also buy an OEM CDV and just pop out the orifice with an allen wrench. That is what the majority of vendors are doing and then marking up the price.

Part #13 ($8.27):
http://www.realoem.com/bmw/showparts...08&hg=21&fg=10

^^^^ yep, do this, but use your CDV and no need to buy any parts. if something goes wrong and you ruin the CDV, then just delete the whole valve.

[bahn stormer]

Originally Posted by Joshboody

^^^^ yep, do this, but use your CDV and no need to buy any parts. if something goes wrong and you ruin the CDV, then just delete the whole valve.

That will work, but I went with a second CDV so I could swap it quickly. I was ready to bleed the clutch but ended up not having to. I can also go 100% back to stock quickly if I have a problem.

By the way for others that haven't done this, one gentle tap with a hammer on the end of an allen wrench is all it takes.

[tibra1]

A good time to also do this is during a brake flush as u have to bleed the system anyways

[dirtmaster666]

Originally Posted by dbogner10

http://www.burgertuning.com/trans.html

i got this one...

just bought same one...waiting for it in mail.....you notice difference with this?