HPLouis

Hi,
I've read about what the CDV does and the reason why it's in our cars. My question is about deleting it. Would this be a worthwhile mod? Would I notice the difference? Does anyone here have any experience on this cars before and after the CDV delete mod?

Thanks,
Henry

EBMCS03

I havent owned one with the CDV removed but have driven one and yes its a worthwile mod... Easy Cheap and makes the clutch engagement much more linear. I would suggest removing the CDV... its a simple mod and if you dont like it put it back... but I'm sure you'll like it.

HPLouis

I had the Rogue SSK and the modded CDV put in this past weekend. You were right. It feels like a different car. The shifts are much more positive now. It's not vague like it used ot be. There is a positive click as I engage each gear. The throw is much shorter and the feel is much better.

The modded CDV is great. I no longer have the jerkiness in the first to second gear shift. The cluch action is much smoother. I wish the car came like this from the factory. Before the modded CDV, I would drive and watch my passenger's head bob back and forth as I shifter. I would have to delay for a couple of seconds on the 1-2 shift just to avoid that. Now I don't have to do that anymore. I just shift and it's a smooth clean pull. Another good thing is that it looks exactly like the original CDV so if I ever have to go in for warranty work or anything like a clutch under my maintenance plan, I don't have to worry about the dealer voiding anything because of the missing CDV.

I didn't think that these two items would make such a difference in the way the car felt and shifted.

Thanks,
Henry

mrfva

Oh man, I can't wait to get those 2 mods on my car. They're next on my list. Glad to hear a positive experience from you.

AP Sales

I hated the way my new car shifted, and the CDV replacement made a HUGE difference. I had a local mechanic do it, and he said he spent more time removing the cover under the engine than replacing the valve.

AlB

+1 on all other comments.

If you are going to do the CDV, I recommend doing a SSK at the same time. You will enjoy the differences.

al

kchan

i got the CDV removed and it seems better, but not as dramatic as some of you have said, maybe i just get used to it =P
always want to try the SSK but don't seem they have one for the 525i...
anyone use the shorter shifter found on the z4 m? i saw someone use it and like it, it's about 1" shorter and makes the shift even better (based on what i heard).

HotLap

Henry - sorry to be a bother...but I just ordered a manual shift 535i and would like to know what the CDV and SSK are that you are referencing above? I have changed out shifter linkage in past Mustangs to a "short throw" shifter and it was a tremendous improvement in the shifting....can you elaborate?

thx!!

kchan

SSK = short shift kit, not sure if they have one for the 535i or not, the most popular one seems to be Rouge and UUC (at least these are the main ones discuss here).
CDV = clutch delay valve, it's a little metal piece that if you alter it, it will give you a smoother clutch engagement.
http://www.zeckhausen.com/
they sell modified CDV and you bring it to a shop and have them swap out the factory one. Not sure the technical aspect of how it works, but do a search on CDV either here or bimmerfest and there are lots of info on this.

JPJ

I have just the knob from this vehicle and really like it. Weighted, shorter, and feels much better to me (plus I like the look). It's nice for a knob, but it's no SSK...