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Read the WELCOME ALL BMWFANATICS post.
Clutch Delay Valve (CDV)??
- Thread starter Philip Foglar
- Start date
"E46 320i, 325i, 330i 1999-06"
Does this mean my 1999 e46 328i does not have one?
Nevermind, found this.
"For the M3, I recommend removing and discarding the CDV. For the E46 3-Series, there is some concern about warranty, since it is supposed to be there on the 320i, 325i, 325xi, 330i, and 330xi models (but not the 328i)."
Still feel a massive delay from the clutch. Should probably still have a look
Does this mean my 1999 e46 328i does not have one?
Nevermind, found this.
"For the M3, I recommend removing and discarding the CDV. For the E46 3-Series, there is some concern about warranty, since it is supposed to be there on the 320i, 325i, 325xi, 330i, and 330xi models (but not the 328i)."
Still feel a massive delay from the clutch. Should probably still have a look
Philip Foglar
///Member
No related - this slows/controls the clutch action irrespective of your clutch inputs so that there is no sudden clutch action that could cause severe drivetrain shock and damage. Problem is, is makes the clutch often feel quite numb so you can still end up with a shunt through the drivetrain from not being able to "feel" as much. Also, the CDV is only used on non IIIM manuals - cars with SMG (manual) gearboxes don't have this since they are computer controlled. They should actually have this, most of the SMG gearbox cars that I have driven in have such harsh gear changes!
Bayn46
Active member
While most people say that it makes changing gears significantly better, they also warn against premature flywheel damage (might depend on driving style too :dunno: ). I have no idea how true this is thought. Removing the CDV should also get rid of the "chunky" gear change, specifically in 1st and 2nd gear.
Philip Foglar
///Member
Still have the CDV on my car and have gotten used to it over the past two years, but might still do this mod even if just to see for myself how it compares - this mod is reversible if using a replacement modified CDV in the case of the E90. Could even simply bypass (delete) the CDV altogether.
Philip Foglar
///Member
Basically, I have to pay a lot more attention when changing gears with the 330i's CDV clutch compared to my diesel bakkie - able to change gears very fast and precisely (need to since HMS Isuzu is not the fastest tool in the garage)! :rollsmile:
Bayn46
Active member
Philip Foglar said:
Do you struggle to get the car into second gear immediately after pushing in the clutch pedal? I mention second because it's either first or second that people see the difference after a CDV delete.
Also, an educational video for the masses who don't feel like reading.
[video=youtube]
Philip Foglar
///Member
Bayn46 said:
When cold particularly notchy, but once warm don't really battle to get into the lower gears as such, maybe just doesn't like especially quick changes. What I do sometimes have is it won't go into first gear on the first attempt - neutral clutch out, and then try again and it works. The problem is more to do with the actual feel of the clutch and its response.
