As a certified BMW tech in Plano, TX...myself and all of our senior techs always remove them because we know why it was put on the car in the first place. In theory, it reduces driveline shock, if an inexperienced driver dumps the clutch. In practice, it prematurely wears the clutch disc and transforms experienced drivers into novices who cannot shift smoothly. During parallel parking, the delay can be infuriating, causing constant clutch slippage. During hard acceleration, the slippage shortens the life of your clutch. During normal driving, the shift from first to second gear will be jerky, leading passengers to say things like: "Dude, what the fuck?" Here in the garage, all BMW techs define the acronym of CDV .....standing for, "Clutch Destroyer Valve" Makes about as much sense as putting snow-chains on a wheel-chair!! Ignore these negative comments about"The engineers designed them so taking them off is dumb" Oh really, you mean those engineers who gave us plastic water pump impellers and plastic T-STAT housing that fail and cause the head to crack?
What surprises me that I haven't read here yet is the possible fuel consumption benefits of doing the CDV delete. I haven't done it myself yet, because I'm doing me research first, but if everthing I have read is true, then I can imagine getting a better feel for the exact release point, means you will be able to minimize unnecessary acceleration when driving off in 1st. Personally, when I first drove my e46 330 xi touring, I thought to myself: "what the fuck is up with this clutch? Old BMWs are super hard to drive!!" But now I know better, and believe deleting the cdv will bring the pleasure back into taking off from first. But to come back to the point of fuel efficiency, as a way to cope with the jumpiness of the car, I accelerate more, and tend to take off in slightly unnecessary higher revs, as a way to make sure I don't jump away at the green light. It's rookie behavior, and not normal for me as an experienced driver at all. It's also annoying in traffic. Driving a manual should be fun, and not tiring! In conclusion, next Sunday, CDV IS COMING OUT!
I'm wondering about this comment because that's not my experience. I bought a late 2002 320 that had never had the clutch replaced. It was at about 67k Miles. I ran that car until about 154,000 miles and the clutch was never an issue. And I ragged the fuck out of it. I heel and toed it and I blipped on upshifts but other than that I ragged the fuck out of it. Early on I considered a CDV delete because I was offended at stalling in simple situations. But I learnt the cars foibles and it has lasted 154,000 miles on one clutch and no signs of giving up anytime soon The body has rusted all to hell. Wings and Mudguards are fucked. It's a damn shame because it was a high end car. Purple Blueberry Nappa leather interior and a BMW Individual paint job outside. (Tourmaline Violet.) Absolutely Gorgeous colour. It has metallic fleks in it so it shines and changes colour but it's basically a metallic dark purple. Looks dark red in most lights. The car looks Great and drives really well. Maybe I'll put a couple of new wings in it and sell it. Luv and Peace.
My CDV was removed within a couple months of getting my 330. The biggest difference I noticed is the amount of control I have in 1st and/or reverse at parking lot speeds. Before I would struggle with the throttle and clutch, now they work in harmony and it's wonderful.
I've just done this to my 325ci and it's made a big difference to the clutch feel. The first mod since buying the car a week ago. Pulling away is how it should be and the change from 1st to 2nd is a lot smoother now. I would also recommend this mod.
Completed a CDVectomy on my E36 M3. The difference is night and day. Clutch engages instantly and the drive is so much more aggressive and swift. Should have done this years ago.
Had this done on my e39 and the car is transformed into a much purer driving machine. The connection between driver, engine, gearbox and wheels is so much better.
Just had mine CDV mod install. It is a night and day difference no jerky shifts from 1st - 2nd. This is a must mod. At first I wasn’t sure but I just got it done today and bled the clutch. This is a must mod for this car. Please take my advice and get it done as soon as possible. I love my car now!!!!!
After watching the video i did this on my 01 325i i gotta say this vid is spot on. The feel of the clutch is much different in a very good way. and its smoother shifts with what feels like snappier pick up after the shift i 100% recommend doing this if you own a manual e46 bmw
How have I not heard of this before... I'm guessing that little thingy is the exact reason why 1 and 2 feel so, hmm, "bouncy" in this car. Especially when trying to be quick about it. I will need to look into this.
So what was the result then mate? Considering doing it myself as i am struggling to get used to 1st and 2nd feeling so 'soft', would you say it was worth doing? Thanks in advance
After having the delay valve delete I would say that the 1st to 2nd shift is much smoother and less jerky. Before the car would often stutter after the shift, especially if you shifted at low speeds, now it is smoother. I'm not sure what you mean by "soft" but I would say this is worth doing, since it is not expensive
I did the CDV delete on my 2008 E92 and it made a huge difference. However, I did not have to bleed the clutch. The air got out after 3 min of driving. Now I want to do this to my wife's 2004 E46 and wondering if I will need to bleed the clutch or if the air will get out on its own again. Definitely worth doing this, some people say they cant feel the difference..wow, how can you not!
I have an 03' BMW 325i and I deleted my clutch delay valve. If you have the same model of BMW then I will tell you if you haven't then do yourself a favour and get rid of it. The clutch engagement is far more predictable. Your brain knows exactly where the clutch is when your leg releases. Even if you do not care about performance advantages this modification greatly improves shifting when your air condition is on. You can shift much faster and not lose revs from the drag of the A/C in between shifts. This results in much smoother shifts and enjoyable driving. After removing my own clutch delay valve it is literally impossible to find one useful reason as to why it belongs in your transmission if you have a rear wheel drive model.
I know exactly what you mean about the shifts being shit while the ac is on. I thought it was just bad DBW calibration, I'm going to remove mine on my 330 and see if it makes a noticeable difference.
Just done mine - slight improvement for normal driving, but low-speed manoeuvres are night-and-day. Used to get insane rev bouncing and kangarooing, but now much more controllable.
Helpful video - thanks for taking the time to share this info. Gave me the confidence to give it a go, and it went well for the most part. Definitely better shifting without the clutch destruct valve.
I've done it on my E60 and it has made my car easier to drive. I did have to drill the CDV and it's a bitch because there is a larger moving part in it which didn't want to come out of the hole. Just screwing in the hose part wasn't possible because the threads wouldn't grab if the angle wasn't exactly correct, so I decided to keep the CDV but to drill it out. But as I said it's hard to do because inside is a moving part which sticks to the drill and doesn't want to come out. But after some persuasion it did. The clutch now feels "normal" - as in if you drop it suddenly (or the RPMs don't match) you're going to get tire slippage or a nudge, before this was masked by the CDV. After some readjustment you get the intuition how or rather when to release the clutch so that the shift is smooth. Before with CDV I just couldn't modulate the clutch properly and would have to rely on dropping the clutch and CDV doing the work from there. Now I can precisely modulate the clutch, have it at 50% traction or any other amount. Before, because of the time delay between my foot and actual clutch it was actually mentally and physically stressful to modulate the clutch beyond just dropping it. It was like I was fighting the CDV system, trying to bypass the delay it introduces. I think this mod is a must for all petrol manual BMWs. I'm not sure about the diesels but I would do it on a diesel also because I like it better when my foot acts as a CDV if necessary.
My Rio has a clutch delay valve. If I shift up quickly without a pause, they will get kicked. This valve gives some delay in shifting (prevents the clutch disc from being pressed against the flywheel quickly and harshly, as can be done with a pedal), especially from 1 to 2 and from 2 to 3, but makes all non-sports shifts smooth too. New BMWs for example G82 also have this valve.
I don't know who introduced this technology, but I did read that Honda introduced this to the AP2 S2000 because idiots were dumping the clutch at extremely high revs at launch on the AP1.
I would love to see you do wheel bearings in the future! But in depth though. Your vid will be the only one that will be in depth for the wheel bearings in youtube!!
I think I’m definitely doing this soon. I noticed if I floor it and shift then get back on throttle there is slippage and I thought it might be due to improper bleeding (still might be the case) but after reading comments and watching the video I definitely think this delete will help and give me a snappier clutch feel
I just make the hole bigger in CDV and now it's night and day difference. Now I can feel engage of the clutch and it works much smoother. The worst was on 1st and 2nd gear and reverse when it was really hard to make it smooth without cluch slip. I can recommend the mod
I did this just today on my E46 320Ci and my opinion is DO IT, it is really like night and day for me, everything feels smoother and even the shifter is smoother for some reason, there was also air in my system before though, there is not a single reason not to do it, I rented a lift for an hour and had it done (with bleeding the clutch) in about 40 mins and I am a complete noob to things like this.
Just wondering is this with the stock self adjusting pressure plate and dual mass flywheel ??? I switched to a single mass flywheel and non adjusting pressure plate already its much better then it was
i have 04 330ci. Cdv delete gives different clutch engagement feel but not night and day. It's only noticeable through 1st to 3rd gear. Other than that, I don't remember it being too different
This thing does my head in trying to get used to.. my old car and no car I’ve had before had this and it’s been infuriating trying to figure out my bite point and changes with how much acceleration to apply and when to apply it in conjunction with my clutch. Think I’m gonna get this done.
Couldn't you also drill it out slightly bigger just to keep a little buffer in the clutch? I feel they also did this because of the slight delay in throttle response because of the drive by wire system these things have.
My 99 e46 328ci jerks a bit when i shift gears driving relaxed (doesnt matter 1-2, 2-3, 3-4, 4-5) even if i release it slowly and smoothfully. When I shift it more aggressively it is not so jerky. Will the CDV delete remove the relaxed driving jerkyness?
Yea it should make a difference. It will make it so that if you time the shift perfectly and release the clutch quickly at the exact right rpm it will be very smooth. This is how I shift all the time. Let the revs drop to where they want to be for the next gear and then release the clutch quickly yet smoothly. The cdv delete made this even smoother but it punishes you if you release the clutch at the wrong time.
When doing mods like this I'm always concerned about how it affects Daily Drivability, specifically passenger comfort. It's typical that everyone wants Go-Fast mods on their car but I don't want my lady or other passengers to have a jerkier/harsher ride. Thoughts on that for this mod and for the lightweight flywheel?
Assuming you can perfect your clutch technique, the the cdv delete will be better. Smoother and less jerky. But if you mess up you shift it will punish you a bit. I would not recommend a lightweight flywheel, if you are worried about smooth drivability. It makes things a little more difficult. It can be done. But not as easily.
I already find that I have to let off the clutch in my 323ci a lot slower than most other cars to get a smooth shift. Not really a problem, 'cause it's my daily and I'm used to it, but I'd rather have it be consistent with the other cars I drive. Would getting rid of the CDV make this better or worse?
My Rio has a clutch delay valve. If I shift up quickly without a pause, they will get kicked. This valve gives some delay in shifting (prevents the clutch disc from being pressed against the flywheel quickly and harshly, as can be done with a pedal), especially from 1 to 2 and from 2 to 3, but makes all non-sports shifts smooth too. New BMWs for example G82 also have this valve.
Do any other BMWs have this fitted? I've long thought the clutch action on my E39 feels vague and slow-witted..... this would be a good explanation as to why! (assuming it has one!)
You can tell that he doesn’t know how to shift smoothly when you watch him drive after removing the CDV. I left my CDV in, my shifts are smooth majority of the time and I can downshift and move away quickly with perfect smoothness. To proper disengage the clutch I always let the clutch out 3/4, stop and then step of completely. You will need to get quicker at this over time. This is especially true for 1st and 2nd. At higher gears you have to step of completely before applying gas and be quick when doing so.
Does this get rid of the clutch "judder" when you release the pedal when driving in like 1st and 2nd gear? Mine seems to judder all the time, and im hoping this CDV delete could fix that I drive an E81 120D btw, if anyone can help
I notice that my shifts are harder to get smoother in my e46 than other cars ive driven. Is this because of the cdv? I also feel like im going to rip the rear end out of the car when i shift from 1st to 2nd flat out, but it seems like the cdv would make this smoother not more rough.
Its been put in not so much for the perceived benefit, but for serviceability. Why would BMW sell you something that doesn't need to be repaired, or doesn't break. It is not in the corporate interest to create a highly reliable automobile anymore!
Somehow I have impression that if you dump it with this valve it fries clutch even more. I hate clutch in my e46 as it gives me less control and biting point is horrible on these. I thought it was me, but after I found this Im heading to tbe garage to get that litlle wanker out.
@@chamberlin1 Exactly the idea is to make the drivetrain idiot proof and prevent people from wearing out their CV joints with jerky shifts. The valve limits the impact torque on the drivetrain. The downside is it also makes it less predictable for an experienced driver that actually can shift smoothly.
@Mohammed Lee 335D e90 generation had manual option in EU. If you dump the clutch in torquey cars, you will spin the wheels as long as your pressure plate is correctly sprung for the torque. If you burn the clutch when you dump it, then your pressure plate is weak. The CDV actually "helps" frying your clutch rather than preventing it in that case.
I wanted to let my BMW specialist remove the cdv in my 2003 325i Touring m sport, but he tells me the valve is part of the fluid line, so impossible te remove. Are you guys familiar with this setting?
btentusscher it’s not even remotely impossible to remove, and most DIYers can do it within 20-30 minutes. if a “specialist” is saying it’s impossible, it’s likely i wouldn’t trust his opinion on much else.
@@rkqkula I know what you mean and I told him, but he is sure some models have this problem. You have to replace the whole line instead of just removing the valve…. Doesn't sound familiair?
thanks for the video, I would bet there were a lot of curse words hidden when the music came on, too bad you aren't near Kentucky, you could show me how to delete mine lmao! be safe, I appreciate your opinion on the delete, I'll be doing mine as I build my car.
+Marty Dummitt if you want to talk about hidden curse words.. go watch my diff swap video. This job was like a soft game of checkers compared to that...
@@mariuszanfir2298 so its only for manuals ... do u know why they say u cant make alot of power with the auto trany isnt there a way to enhance the auto transmission so it wont blow up if u make more power
Nice video man! I have a question, how does the e46 perform with the CDV delete while stuck in traffic after the work??Like shifting from 1st to 2nd and back to 1st etc.. and creeping forward sometimes...
It makes it easier. However it won't be as forgiving if you downshift and don't revmatch properly or let the clutch out smoothly. It will grab and you will feel a jolt. You just have to get used to it.
E46 Reviews with T.H. Oh thanks for the really quick reply!!! So basically if I don't revmatch properly I will brake my clutch faster without the CDV? But when I am stuck in traffic and I shift down from 2nd to 1st I drive very slowely anyway...
For me it's actually easier. If you've driven any other manual then you'll be right at home. The clutch works as expected - you can generate proportional slippage if you want. I don't really understand CDV - I guess BMW wanted to go for that premium feel so they though any fast clutch engagement is unacceptable since it can make the car feel unpremium or something. But without CDV all just depends on your foot as with other manual cars. You can be as smooth as you want.
Im about to do a tranny swap cause mine took a shit. Along with clutch flywheel and a bunch of bushings. Ima check this out on my car. I am going to run a single mass flywheel with a sprung clutch. Hopefully that wont make noise at idle :D
better comparison of before and after... the before feels like your clutch line is working with a coffee straw and after feels like a regular straw, much smoother flow of fluid
They give you a delay valve and you take it off, they don't give you a delay valve and you buy a custom one and brag about it. Loser. its softening at the end because you are slipping now. You need the delay valve to reduce shock load.
You don't need a delay valve to reduce shock load, you only need it when you don't know how to shift properly. It was put in there to smooth out bad clutch operation, to help people that do not know and have no interest in learning how the clutch operates. If not having it was so detrimental, you would see e36s changing clutches (or flywheels) every 20k km. Mine still has the original clutch it came from the factory 23 years ago and 200k+ km on board. And it has seen plenty of abuse.
As a certified BMW tech in Plano, TX...myself and all of our senior techs always remove them because we know why it was put on the car in the first place. In theory, it reduces driveline shock, if an inexperienced driver dumps the clutch. In practice, it prematurely wears the clutch disc and transforms experienced drivers into novices who cannot shift smoothly. During parallel parking, the delay can be infuriating, causing constant clutch slippage. During hard acceleration, the slippage shortens the life of your clutch. During normal driving, the shift from first to second gear will be jerky, leading passengers to say things like: "Dude, what the fuck?"
Here in the garage, all BMW techs define the acronym of CDV .....standing for, "Clutch Destroyer Valve"
Makes about as much sense as putting snow-chains on a wheel-chair!!
Ignore these negative comments about"The engineers designed them so taking them off is dumb" Oh really, you mean those engineers who gave us plastic water pump impellers and plastic T-STAT housing that fail and cause the head to crack?
no wonder it always shakes when i shift 1-2, i thought i had not perfected it
have you tried resetting the electronic throttle adaptations?
What surprises me that I haven't read here yet is the possible fuel consumption benefits of doing the CDV delete. I haven't done it myself yet, because I'm doing me research first, but if everthing I have read is true, then I can imagine getting a better feel for the exact release point, means you will be able to minimize unnecessary acceleration when driving off in 1st. Personally, when I first drove my e46 330 xi touring, I thought to myself: "what the fuck is up with this clutch? Old BMWs are super hard to drive!!" But now I know better, and believe deleting the cdv will bring the pleasure back into taking off from first. But to come back to the point of fuel efficiency, as a way to cope with the jumpiness of the car, I accelerate more, and tend to take off in slightly unnecessary higher revs, as a way to make sure I don't jump away at the green light. It's rookie behavior, and not normal for me as an experienced driver at all. It's also annoying in traffic. Driving a manual should be fun, and not tiring! In conclusion, next Sunday, CDV IS COMING OUT!
Drive by wire vs. linkage. If you don't already, try disengaging you traction and stability control.
I'm wondering about this comment because that's not my experience.
I bought a late 2002 320 that had never had the clutch replaced. It was at about 67k Miles. I ran that car until about 154,000 miles and the clutch was never an issue. And I ragged the fuck out of it. I heel and toed it and I blipped on upshifts but other than that I ragged the fuck out of it.
Early on I considered a CDV delete because I was offended at stalling in simple situations.
But I learnt the cars foibles and it has lasted 154,000 miles on one clutch and no signs of giving up anytime soon
The body has rusted all to hell.
Wings and Mudguards are fucked.
It's a damn shame because it was a high end car. Purple Blueberry Nappa leather interior and a BMW Individual paint job outside. (Tourmaline Violet.)
Absolutely Gorgeous colour. It has metallic fleks in it so it shines and changes colour but it's basically a metallic dark purple.
Looks dark red in most lights.
The car looks Great and drives really well.
Maybe I'll put a couple of new wings in it and sell it.
Luv and Peace.
My CDV was removed within a couple months of getting my 330. The biggest difference I noticed is the amount of control I have in 1st and/or reverse at parking lot speeds. Before I would struggle with the throttle and clutch, now they work in harmony and it's wonderful.
I've done a delay valve delete as well. Definitely worth doing. It makes the clutch much more predictable. Great instructions.
I've just done this to my 325ci and it's made a big difference to the clutch feel. The first mod since buying the car a week ago. Pulling away is how it should be and the change from 1st to 2nd is a lot smoother now. I would also recommend this mod.
Completed a CDVectomy on my E36 M3. The difference is night and day. Clutch engages instantly and the drive is so much more aggressive and swift. Should have done this years ago.
"You're watching Throttle Hooouse, I'm Thomas, and I'm James"
Had this done on my e39 and the car is transformed into a much purer driving machine. The connection between driver, engine, gearbox and wheels is so much better.
Just had mine CDV mod install. It is a night and day difference no jerky shifts from 1st - 2nd. This is a must mod. At first I wasn’t sure but I just got it done today and bled the clutch. This is a must mod for this car. Please take my advice and get it done as soon as possible. I love my car now!!!!!
"it engages with more... ｚｅｓｔ"
After watching the video i did this on my 01 325i i gotta say this vid is spot on. The feel of the clutch is much different in a very good way. and its smoother shifts with what feels like snappier pick up after the shift
i 100% recommend doing this if you own a manual e46 bmw
i have an 01 325i manual also. thanks for the comment. im going to try this.
I must say your videos are amazing, very helpful to a uk 330ci owner.
How have I not heard of this before... I'm guessing that little thingy is the exact reason why 1 and 2 feel so, hmm, "bouncy" in this car. Especially when trying to be quick about it. I will need to look into this.
i thought i was the only one who has this problem in 1st and 2nd
My '01 530i is so hurky jerky in the 1 to 2 shift as well. Can't wait to delete this damn thing.
So what was the result then mate? Considering doing it myself as i am struggling to get used to 1st and 2nd feeling so 'soft', would you say it was worth doing? Thanks in advance
After having the delay valve delete I would say that the 1st to 2nd shift is much smoother and less jerky. Before the car would often stutter after the shift, especially if you shifted at low speeds, now it is smoother. I'm not sure what you mean by "soft" but I would say this is worth doing, since it is not expensive
Thanks for reply, going to do it later.
5:25 great downshift, bro.
Ace Futura how? He just slammed it in lower gear and the whole car snapped pretty hard. Not smooth at all.
he was being sarcastic...
Jan Prokopenko it didnt snap hard he rev-matched his downshift then smacked the gas
I did the CDV delete on my 2008 E92 and it made a huge difference. However, I did not have to bleed the clutch. The air got out after 3 min of driving. Now I want to do this to my wife's 2004 E46 and wondering if I will need to bleed the clutch or if the air will get out on its own again. Definitely worth doing this, some people say they cant feel the difference..wow, how can you not!
I have an 03' BMW 325i and I deleted my clutch delay valve.
If you have the same model of BMW then I will tell you if you haven't then do yourself a favour and get rid of it.
The clutch engagement is far more predictable. Your brain knows exactly where the clutch is when your leg releases.
Even if you do not care about performance advantages this modification greatly improves shifting when your air condition is on. You can shift much faster and not lose revs from the drag of the A/C in between shifts. This results in much smoother shifts and enjoyable driving. After removing my own clutch delay valve it is literally impossible to find one useful reason as to why it belongs in your transmission if you have a rear wheel drive model.
Mike Harrypersad cheers for the comment. going to try this on my 325i
me too
THANK YOU.. was dying to find a CLEAR opinion on it before I tried it myself.
I know exactly what you mean about the shifts being shit while the ac is on. I thought it was just bad DBW calibration, I'm going to remove mine on my 330 and see if it makes a noticeable difference.
@@srcej6 how’d it turn out?
Just done mine - slight improvement for normal driving, but low-speed manoeuvres are night-and-day.
Used to get insane rev bouncing and kangarooing, but now much more controllable.
Does this get rid of that judder you get when releasing the clutch pedal in 1st + 2nd gear? My E81 does it all the time and it drives me nuts!
Best mod ive ever done to any car, its like night and day.
Helpful video - thanks for taking the time to share this info. Gave me the confidence to give it a go, and it went well for the most part. Definitely better shifting without the clutch destruct valve.
I've done it on my E60 and it has made my car easier to drive. I did have to drill the CDV and it's a bitch because there is a larger moving part in it which didn't want to come out of the hole. Just screwing in the hose part wasn't possible because the threads wouldn't grab if the angle wasn't exactly correct, so I decided to keep the CDV but to drill it out. But as I said it's hard to do because inside is a moving part which sticks to the drill and doesn't want to come out. But after some persuasion it did.
The clutch now feels "normal" - as in if you drop it suddenly (or the RPMs don't match) you're going to get tire slippage or a nudge, before this was masked by the CDV. After some readjustment you get the intuition how or rather when to release the clutch so that the shift is smooth. Before with CDV I just couldn't modulate the clutch properly and would have to rely on dropping the clutch and CDV doing the work from there. Now I can precisely modulate the clutch, have it at 50% traction or any other amount. Before, because of the time delay between my foot and actual clutch it was actually mentally and physically stressful to modulate the clutch beyond just dropping it. It was like I was fighting the CDV system, trying to bypass the delay it introduces. I think this mod is a must for all petrol manual BMWs. I'm not sure about the diesels but I would do it on a diesel also because I like it better when my foot acts as a CDV if necessary.
I had the same trouble until I performed the delete.
Haha its so funny to see this after watching your newer content.
HIGHLY Suggested. It made a huge improvement. M235 is much more fun and easier to drive now.
My Rio has a clutch delay valve. If I shift up quickly without a pause, they will get kicked. This valve gives some delay in shifting (prevents the clutch disc from being pressed against the flywheel quickly and harshly, as can be done with a pedal), especially from 1 to 2 and from 2 to 3, but makes all non-sports shifts smooth too. New BMWs for example G82 also have this valve.
I don't know who introduced this technology, but I did read that Honda introduced this to the AP2 S2000 because idiots were dumping the clutch at extremely high revs at launch on the AP1.
I would love to see you do wheel bearings in the future! But in depth though. Your vid will be the only one that will be in depth for the wheel bearings in youtube!!
I think I’m definitely doing this soon. I noticed if I floor it and shift then get back on throttle there is slippage and I thought it might be due to improper bleeding (still might be the case) but after reading comments and watching the video I definitely think this delete will help and give me a snappier clutch feel
Lol so this is what throttle house started as sweet what a difference at least you picked a badass channel name way back then 😄
I just make the hole bigger in CDV and now it's night and day difference. Now I can feel engage of the clutch and it works much smoother.
The worst was on 1st and 2nd gear and reverse when it was really hard to make it smooth without cluch slip. I can recommend the mod
And I drive 540i E39
TH your videos rock. And I fully agree. The CDV gets my vote as BMW's most idiotic invention EVER.
Thanks! Yea I'm not sure how they thought the "ultimate driving machine" needed something to make "ultimate driving" difficult. Das ist stupid.
One of the worst but hardly on the top. I vote for no dipstick and electric water pumps!
I did this just today on my E46 320Ci and my opinion is DO IT, it is really like night and day for me, everything feels smoother and even the shifter is smoother for some reason, there was also air in my system before though, there is not a single reason not to do it, I rented a lift for an hour and had it done (with bleeding the clutch) in about 40 mins and I am a complete noob to things like this.
5:33 perfect analogy
Finally did this on my Z4, best free mod ever. BMW should never have fitted it.
Lol @ ur professional engineering advice
NICE! I lol'd when the music came on when you struggled to get the valve unscrewed lmao.
Just wondering is this with the stock self adjusting pressure plate and dual mass flywheel ??? I switched to a single mass flywheel and non adjusting pressure plate already its much better then it was
I was like: "holy crap, that's Thomas!", then I realized what channel this was on :P
i have 04 330ci. Cdv delete gives different clutch engagement feel but not night and day. It's only noticeable through 1st to 3rd gear. Other than that, I don't remember it being too different
Bonus to doing the manual swap....chase bays flexline to from clutch master straight to slave never having to deal with this valve
This thing does my head in trying to get used to.. my old car and no car I’ve had before had this and it’s been infuriating trying to figure out my bite point and changes with how much acceleration to apply and when to apply it in conjunction with my clutch. Think I’m gonna get this done.
where have you been all my life
mine still feels a bit jurky when pulling from 1st to 2nd. disengages the clutch a bit to hard.
Couldn't you also drill it out slightly bigger just to keep a little buffer in the clutch?
I feel they also did this because of the slight delay in throttle response because of the drive by wire system these things have.
The 323’s have manual cable operated throttles
What exhaust/intake mods have you done? Sounds great!
what is it like now after years of not having it????
My 99 e46 328ci jerks a bit when i shift gears driving relaxed (doesnt matter 1-2, 2-3, 3-4, 4-5) even if i release it slowly and smoothfully. When I shift it more aggressively it is not so jerky. Will the CDV delete remove the relaxed driving jerkyness?
Yea it should make a difference. It will make it so that if you time the shift perfectly and release the clutch quickly at the exact right rpm it will be very smooth. This is how I shift all the time. Let the revs drop to where they want to be for the next gear and then release the clutch quickly yet smoothly. The cdv delete made this even smoother but it punishes you if you release the clutch at the wrong time.
+E46 Reviews with T.H. So if you delete the cdv it makes it less forgiving but more rewarding and smoothly when done right?
+Mitchell Sprenkeling - Yea exactly!
It makes sense if you just dump the clutch all the time, then it will prevent the flywheel from breaking.
Gonna do it in my 528it manual touring I’ve been wondering why I had to shift “slow”
When doing mods like this I'm always concerned about how it affects Daily Drivability, specifically passenger comfort. It's typical that everyone wants Go-Fast mods on their car but I don't want my lady or other passengers to have a jerkier/harsher ride. Thoughts on that for this mod and for the lightweight flywheel?
Assuming you can perfect your clutch technique, the the cdv delete will be better. Smoother and less jerky. But if you mess up you shift it will punish you a bit. I would not recommend a lightweight flywheel, if you are worried about smooth drivability. It makes things a little more difficult. It can be done. But not as easily.
Ok thanks for the advice. Great channel btw, keep it up! Sub'd.
You did change the slave cylinder to and that's partly why it feels different to.
Any tips on what happened to the Dash? It fried? just a fuse? How do you fixed?
I already find that I have to let off the clutch in my 323ci a lot slower than most other cars to get a smooth shift. Not really a problem, 'cause it's my daily and I'm used to it, but I'd rather have it be consistent with the other cars I drive. Would getting rid of the CDV make this better or worse?
My Rio has a clutch delay valve. If I shift up quickly without a pause, they will get kicked. This valve gives some delay in shifting (prevents the clutch disc from being pressed against the flywheel quickly and harshly, as can be done with a pedal), especially from 1 to 2 and from 2 to 3, but makes all non-sports shifts smooth too. New BMWs for example G82 also have this valve.
Thank you, very informative video! Just did it on my e39 540 and am really impressed how much better it is now.
Hello, it is easy to remove on the CDV on the E39 ?
Do any other BMWs have this fitted? I've long thought the clutch action on my E39 feels vague and slow-witted..... this would be a good explanation as to why! (assuming it has one!)
All E39s apart from M5 have it although I heard on the E46 it is the most restrictive of all of them.
I don't want to brag, but I was the thousandth like on the video!
You can tell that he doesn’t know how to shift smoothly when you watch him drive after removing the CDV. I left my CDV in, my shifts are smooth majority of the time and I can downshift and move away quickly with perfect smoothness.
To proper disengage the clutch I always let the clutch out 3/4, stop and then step of completely. You will need to get quicker at this over time. This is especially true for 1st and 2nd. At higher gears you have to step of completely before applying gas and be quick when doing so.
Reading this gave me a seizure
@@user-mr8wv7ww6q I’ve added some commas and full stops should be better now bitch.
i did this and only noticed the clutch grabbed slightly harder driving hard but driving normal i only noticed reverse felt easier
Does this get rid of the clutch "judder" when you release the pedal when driving in like 1st and 2nd gear? Mine seems to judder all the time, and im hoping this CDV delete could fix that
I drive an E81 120D btw, if anyone can help
I notice that my shifts are harder to get smoother in my e46 than other cars ive driven. Is this because of the cdv? I also feel like im going to rip the rear end out of the car when i shift from 1st to 2nd flat out, but it seems like the cdv would make this smoother not more rough.
+Win8pc it will probably help yes
What are disadvantages of deleting the clutch delay valve tho?
I think the clutch delay valve would wear the clutch even more,its a dumb part on the BMW engineers
Its been put in not so much for the perceived benefit, but for serviceability. Why would BMW sell you something that doesn't need to be repaired, or doesn't break. It is not in the corporate interest to create a highly reliable automobile anymore!
Somehow I have impression that if you dump it with this valve it fries clutch even more. I hate clutch in my e46 as it gives me less control and biting point is horrible on these. I thought it was me, but after I found this Im heading to tbe garage to get that litlle wanker out.
It does! That's the whole idea... Burn up the wear parts and keep the expensive transmission safe for the life of the warranty...
@@chamberlin1 Exactly the idea is to make the drivetrain idiot proof and prevent people from wearing out their CV joints with jerky shifts. The valve limits the impact torque on the drivetrain. The downside is it also makes it less predictable for an experienced driver that actually can shift smoothly.
@Mohammed Lee 335D e90 generation had manual option in EU. If you dump the clutch in torquey cars, you will spin the wheels as long as your pressure plate is correctly sprung for the torque. If you burn the clutch when you dump it, then your pressure plate is weak. The CDV actually "helps" frying your clutch rather than preventing it in that case.
hey I man I got a 99 BMW 323i would mine have this CDV? ??
Yes, all Bmws have one except M series cars
hey man i have a bmw e90 2007 manual diesel on cold start when i take off it has a judder is that from the cvd or the clutch?
heatspots on flywheel will need flywheel machined and new clutch
Can I use the pressure bleeder to bleed the clutch? Just like brakes?
Sujay K yep!
I wanted to let my BMW specialist remove the cdv in my 2003 325i Touring m sport, but he tells me the valve is part of the fluid line, so impossible te remove. Are you guys familiar with this setting?
btentusscher Get a new specialist.
Can you elaborate?
btentusscher it’s not even remotely impossible to remove, and most DIYers can do it within 20-30 minutes. if a “specialist” is saying it’s impossible, it’s likely i wouldn’t trust his opinion on much else.
@@rkqkula I know what you mean and I told him, but he is sure some models have this problem. You have to replace the whole line instead of just removing the valve…. Doesn't sound familiair?
btentusscher not to my knowledge, but i could be wrong.
I’m sold 👍🏼
I want to eventually do this on my E90.
Can you and should you do this on SMG cars?
thanks for the video, I would bet there were a lot of curse words hidden when the music came on, too bad you aren't near Kentucky, you could show me how to delete mine lmao! be safe, I appreciate your opinion on the delete, I'll be doing mine as I build my car.
+Marty Dummitt if you want to talk about hidden curse words.. go watch my diff swap video. This job was like a soft game of checkers compared to that...
does apply to f30 ? 320d n47?
Hey i own a bmw 2004 330d automatic does it also have a cdv ?
Absolutely not. You don't have a clutch, do you :P ?
@@mariuszanfir2298 so its only for manuals ... do u know why they say u cant make alot of power with the auto trany isnt there a way to enhance the auto transmission so it wont blow up if u make more power
great video. SUBSCRIBED
And im doing the delete today thanks bud
doing this shit tomorrow on my e46 325xi...
does a e36 also have this sorcery?
Nope. If you had it, you would know there's something fishy with your clutch.
Nice video man!
I have a question, how does the e46 perform with the CDV delete while stuck in traffic after the work??Like shifting from 1st to 2nd and back to 1st etc.. and creeping forward sometimes...
It makes it easier. However it won't be as forgiving if you downshift and don't revmatch properly or let the clutch out smoothly. It will grab and you will feel a jolt. You just have to get used to it.
E46 Reviews with T.H.
Oh thanks for the really quick reply!!!
So basically if I don't revmatch properly I will brake my clutch faster without the CDV?
But when I am stuck in traffic and I shift down from 2nd to 1st I drive very slowely anyway...
For me it's actually easier. If you've driven any other manual then you'll be right at home. The clutch works as expected - you can generate proportional slippage if you want. I don't really understand CDV - I guess BMW wanted to go for that premium feel so they though any fast clutch engagement is unacceptable since it can make the car feel unpremium or something. But without CDV all just depends on your foot as with other manual cars. You can be as smooth as you want.
***** Thx mate for your reply ;
I would do it if I was you😂 definitely gonna do this to the e39
Hi, did you remove it on your E39 ?
I really want to do this on my Civic Type-R
Mine taps now.....boat motor sound.....gave up...reinstalled
Bmw is not the only one with CDVs ,most modern cars have these unfortunately 😔
Nice and helpful video. Next job, refurbishing the steering wheel? ;-)
Already been done!
do m3's have this?
+John DotCom yep
Im about to do a tranny swap cause mine took a shit. Along with clutch flywheel and a bunch of bushings. Ima check this out on my car. I am going to run a single mass flywheel with a sprung clutch. Hopefully that wont make noise at idle :D
+John DotCom it wont.
make sure the smf is made in one piece not welded
I m going to remove m cruze c d v today
better comparison of before and after... the before feels like your clutch line is working with a coffee straw and after feels like a regular straw, much smoother flow of fluid
Does this apply to e92?
5673 Jabari Lake
e46 325 2001, automatic, have delay valve?
Rony Suwanto keyword CCCLUUUTCHHH delay valve
ow ow owwwwt not oot ffs
:)
Zest
Dont mess with factory setting and don't think you are clever doing this, it's cheaper to replace clatch rather than damaged crankshaft
They give you a delay valve and you take it off, they don't give you a delay valve and you buy a custom one and brag about it. Loser. its softening at the end because you are slipping now. You need the delay valve to reduce shock load.
You don't need a delay valve to reduce shock load, you only need it when you don't know how to shift properly. It was put in there to smooth out bad clutch operation, to help people that do not know and have no interest in learning how the clutch operates. If not having it was so detrimental, you would see e36s changing clutches (or flywheels) every 20k km. Mine still has the original clutch it came from the factory 23 years ago and 200k+ km on board. And it has seen plenty of abuse.
Or just get a 10 year old E63 for 18gs.
So your answer for a 7min free job is to spend the time finding and buying an 18k car? This makes sense to you?
5953 Jerad Vista
Can you change from 1st to 2nd more quickly?? Cause i have the same problem in 0-400 i cant change fast