Find More Posts by oldbimmercoupe. Originally Posted by BlackjackMulligan. I think whenever bleeding is involved it's best left to the experts- I think that's not a bad amount to pay for something that you're very happy with. Originally Posted by oldbimmercoupe. Okay, had mine installed yesterday when I had the car in for the mile oil change Clutch is now much easier to modulate when starting off in 1st, making the whole process much smoother and less vague feeling. Similar improvement in smoothness on the up-shirt.
Well worth. I wouldn't call it night and day. It's nicer, yes, but totally underwhelming. It does feel more like my CDV-less E I always thought the CDV was more intrusive on my old E46 compared to my If you don't have problems shifting now, I would recommend against this mod.
Originally Posted by jkoral. My Track Videos. But it doesn't really bother me. Especially if I make a mental note to adjust my driving for it. Basically, when I switch to my i from my other car, I need to remember to release the clutch faster. As in, immediately. That way, the CDV acts like my foot pausing on the engagement point and making ths shift smooth. If I remember this, I can shift smoothly. If I don't, and I pause my foot, the car is jerky when switching gears.
Alow - even IF you are a smooth driver the CDV will make your clutch pedal feel more crisp when pressing it down or releasing it.
Getting rid of the really makes the car feel more alive. Not in half a second. The CDV drove me mad. I am really glad I got rid of mine. I've never felt that the gearbox or clutch were an issue, be interesting to drive a car with the CDV delete just to compare.. I think i like the difference mainly cause its quicker engagement and more predictable now.. Im still adjusting to the difference when i shift so it seems slightly more jerky to me as of now but overall i think this mod is good.
It should increase performance as far as acceleration as well. Was a super cheap mod for me.. The cover comes off once you remove the 8 screws and twist the cover about 45 degrees to clear the slot shown in Pic 1.
Pic 2 4. I chose to remove it. There's a small metal clip on the CDV, and an identical one on the coupling. See the circled items in pic 3. Also, take a took at a closeup of the CDV in pic 4, to see how to pop the retaining wire out with a small flat bladed screwdriver.
Once you have the two retaining wires popped out a bit as in pic 4 , quickly pull out the fluid line going into the CDV, and cap it with your finger. Then, pull out the CDV itself. Then take the fluid line that you have capped with your finger, and plug it into the coupling. You'll lose a bit of fluid, but not that much. Push the retaining wire back in to secure the fluid line in the coupling. It will look like pic 5 when you're done.
Locate the bleed valve, pic 6 and unloosen it while you have a cup under it to catch the fluid, and have somebody press the clutch pedal once to the floor, and hold it there, while you tighten the bleed valve.
Have a congratulatory beer and admire you're k1z. You'll notice that the clutch pedal will respond more directly to your input now, and YOU can control how it it let out.
Gizmo Banned. Leave it in there, its there for a reason. Besides the reduced life expectancy of your clutch, flywheel, gearbox and rubber propshaft coupling, what gains do you get from removing it?
I already did mine way back when.. Go and check www. Smoother shifting.. Especially in my car, 1st to 2nd is quite bumpy.. Brigadier General. Agree with all of the above. While I don't have personal experience, an aftermarket warranty company may try to deny a clutch-related claim if this modification is noted by the shop.
If you have an aftermarket warranty, the Zeck replacement is cheap enough I think the difference is significant; I'd lose it. I'm not the original owner of my M, how do I know I still have the CDV without taking things apart or jacking up the car? Originally Posted by KevinM. Originally Posted by RevsPlease. With the only exception being the 2nd gen M5. Last edited by KevinM; at PM.. Originally Posted by Rekla. Originally Posted by txz4. Originally Posted by Aries I'll have to do it this spring.
A useful, simple mod in my experience. I went from frustration in the shift to smooth 5k shifting in both standard and sport settings without a second thought. Caveat: I may have been trying to shift early before the CDV valve delete and the removal simply coincided with me learning about the shift idiosyncrasies of the Z4M. I know it's tough to commit to shifting at , RPM or thereabouts in a residential neighborhood but that's where my sweet spot is. The gearing is pretty short so if you can't commit to the shift at a reasonable RPM, let it go.
Once the car is on a hoist, the valve is just hanging there like a ripe peach. Replacement is easy. I avoided complete removal because I did not want to stress the line by pulling it a little further than it was used to going. Probably not a real concern but I have read you can make your own CDV by taking of the stock one, drifting out the little removable restrictive throat, and replacing the unit.
Or keep the original and install the Zeck replacement. I went the easy route, bought a Zeck, and am saving the original to ensure my great grandchildren have it in case they want to return my then 75 year old Z4M to stock condition.
Last edited by EenyBear; at AM.. I haven't removed the CDV, and I think I might have an answer as to why some people don't see a difference, and for others it's night and day.
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