BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      11-19-2014, 02:59 PM   #1
tremere613
First Lieutenant
tremere613's Avatar
26
Rep
325
Posts

Drives: 09' 135i M package convertible
Join Date: May 2012
Location: D.C

iTrader: (3)

To CDV delete or not.. That is the question..

Hey guys releasing the clutch in first gear has been a hit or miss and very vague affair...
At times I get a surprise jolt toward the top of the clutch pedal while I am releasing.

When I shift slowly.."see-saw" it happens quite often but when I power shift... It's smooth as can be...

I can not always power shift as the traffic in my area can be quite ridiculous...

Basically will deleting the CDV help with the releasing first gear?

Should I be worried about damage to my car with CDV?

Which supplier should I get it from?
__________________
Mods: Clutch stop, BMW performance SSK, BMW PE exhaust, CDV delete, Clutch pedal spring delete (CPS delete) : ) - check out the the DIY:http://www.1addicts.com/forums/showthread.php?t=1122797
Appreciate 0
      11-19-2014, 03:05 PM   #2
ShocknAwe
1Addict
ShocknAwe's Avatar
3202
Rep
7,860
Posts

Drives: E82 Mutt, M57 Truck
Join Date: Jul 2012
Location: Charleston

iTrader: (22)

http://www.1addicts.com/forums/showthread.php?t=209440

Do it.
__________________
2010 135i 6MT Jet Black
N54/3 FE82 Mutt | BUILD THREAD | GARAGE SALE
Appreciate 0
      11-19-2014, 10:49 PM   #3
aloksatoor
Second Lieutenant
21
Rep
232
Posts

Drives: Carrera S PDK
Join Date: Aug 2014
Location: Walnut Creek, CA

iTrader: (0)

Yes it helps with that for sure. That and a clutch stop.
Appreciate 0
      11-20-2014, 09:49 AM   #4
BigRussia
Captain
BigRussia's Avatar
152
Rep
984
Posts

Drives: 04 M3
Join Date: Nov 2014
Location: SFL

iTrader: (5)

Yeah I've only had my car a month and my biggest complaint is how the clutch acts. I have the same symptoms as you described and cant wait to delete this damn CDV lol.
Appreciate 0
      11-20-2014, 10:02 AM   #5
ShocknAwe
1Addict
ShocknAwe's Avatar
3202
Rep
7,860
Posts

Drives: E82 Mutt, M57 Truck
Join Date: Jul 2012
Location: Charleston

iTrader: (22)

BTW: You can either outright delete the CDV, or you can use a small allen key (I think I used a 4mm?) to push the bits causing the restriction out. Obviously do this while the CDV is completely off the car and the lines are capped.
__________________
2010 135i 6MT Jet Black
N54/3 FE82 Mutt | BUILD THREAD | GARAGE SALE
Appreciate 0
      11-21-2014, 06:35 PM   #6
AtlRyan
Registered
0
Rep
3
Posts

Drives: Senoda Red 135i
Join Date: Jun 2014
Location: Georgia

iTrader: (0)

Quote:
Originally Posted by aloksatoor View Post
Yes it helps with that for sure. That and a clutch stop.
.

Completely removed the CDV and added a bump stop 6 weeks ago. Much happier with shifting now!!

Do it. You can always re-install.
Appreciate 0
      11-21-2014, 07:40 PM   #7
tremere613
First Lieutenant
tremere613's Avatar
26
Rep
325
Posts

Drives: 09' 135i M package convertible
Join Date: May 2012
Location: D.C

iTrader: (3)

crazy question guys:

I'm due for a brake flush at the dealership, can I replace the CDV with a modified one and drive to the dealership for the flush? I think the brakes and clutch share systems?

Would I be ok driving with some air in the system?
does the brake flush cover the clutch?
Appreciate 0
      11-21-2014, 08:47 PM   #8
A_Squared
Banned
46
Rep
363
Posts

Drives: n54
Join Date: Aug 2013
Location: Las Vegas

iTrader: (2)

Quote:
Originally Posted by tremere613
crazy question guys:

I'm due for a brake flush at the dealership, can I replace the CDV with a modified one and drive to the dealership for the flush? I think the brakes and clutch share systems?

Would I be ok driving with some air in the system?
does the brake flush cover the clutch?
The brake and clutch do share the same reservoir, however the clutch line has its own bleed screw. Highly doubt the dealership is going to rebleed your clutch when they flush the brakes. When you flush and re bleed your brake system, I don't think you have to flush and re bleed your clutch line unless you want to. Correct me if I'm wrong.
Appreciate 0
      11-22-2014, 11:30 AM   #9
tremere613
First Lieutenant
tremere613's Avatar
26
Rep
325
Posts

Drives: 09' 135i M package convertible
Join Date: May 2012
Location: D.C

iTrader: (3)

Gotcha, what kind of fluid does BMW use? Anything good available off the shelf?
__________________
Mods: Clutch stop, BMW performance SSK, BMW PE exhaust, CDV delete, Clutch pedal spring delete (CPS delete) : ) - check out the the DIY:http://www.1addicts.com/forums/showthread.php?t=1122797
Appreciate 0
      11-22-2014, 11:42 AM   #10
andrey_gta
Brigadier General
andrey_gta's Avatar
Canada
298
Rep
4,040
Posts

Drives: 130i coupé ;)
Join Date: Nov 2011
Location: Bimmerpost

iTrader: (1)

Garage List
2008 BMW 128i  [10.00]
CDV is the gateway mod... pretty soon you will be more addicted to "fixing"/upgrading
__________________
128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
Appreciate 1
      11-22-2014, 06:17 PM   #11
A_Squared
Banned
46
Rep
363
Posts

Drives: n54
Join Date: Aug 2013
Location: Las Vegas

iTrader: (2)

Quote:
Originally Posted by tremere613 View Post
Gotcha, what kind of fluid does BMW use? Anything good available off the shelf?
I'm sure BMW uses their own brand of fluids, but I used Motul RBF600. Seems to be working good for me. I don't track yet, just mainly spirited driving.
Appreciate 0
      11-30-2014, 07:22 PM   #12
Helltime
Private
2
Rep
80
Posts

Drives: 09 135i sport package
Join Date: Mar 2014
Location: Iowa

iTrader: (0)

I recommend this to everyone, I had read about it and one day when i had the car on ramps anyways for an oil change i went ahead and performed this mod. Feels like a proper manual trans now. I hated the CDV and how it made the clutch engagement total crap.
__________________
2009 135i 6MT jb4, ER CP, Tial BOV, 7" VRSF FMIC, BMS DCI, BMS 91 Pump flash running 35% e85
09 G8 GT
05 GTI 1.8T 5spd
Appreciate 0
      11-30-2014, 08:07 PM   #13
Dackelone
European Editor
Dackelone's Avatar
Germany
10512
Rep
22,992
Posts

Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

iTrader: (1)

Quote:
Originally Posted by Helltime View Post
I recommend this to everyone, I had read about it and one day when i had the car on ramps anyways for an oil change i went ahead and performed this mod. Feels like a proper manual trans now. I hated the CDV and how it made the clutch engagement total crap.
+1.


CDV Delete/Replacement DIY
http://www.1addicts.com/forums/showthread.php?t=209440
Appreciate 0
      12-02-2014, 08:11 AM   #14
Grinchxvx
Lieutenant
Grinchxvx's Avatar
29
Rep
414
Posts

Drives: 2008 135i
Join Date: Apr 2014
Location: Salt Lake City

iTrader: (0)

CDV and BMS clutch stop will help a ton. When I first got this car it didn't have a clutch stop and shifting was pretty wonky so I bought that push in clutch stop and holy shit is it better now. Engagement starts pretty much right off the clutch stop. I have every shifting and trans mod available and it's pretty nice
__________________
2008 Aw/Coral Red Manual 135i Coupe-
JB4 G5 + BMS race flash, BMS meth kit, VRSF DP, Big tom Ic, BMS chinese tester CP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, KW v2, M RSFB, 1M Front and rear Bumper, Performance Side Skirts, slek trunk, Lci blacklines.]
Appreciate 0
      11-09-2020, 05:42 PM   #15
AUDELA
Private
AUDELA's Avatar
United Kingdom
2
Rep
65
Posts

Drives: BMW 325i N53 3.0L (E93) 6MT
Join Date: Nov 2020
Location: London

iTrader: (0)

I asked a technician today if he could perform a CDV delete for me and he advised against it. Said it would actually make the tranny more notchy not less. He said for city driving the CDV delete is not ideal. Instead he suggested putting in braided hose to help make the shifting smoother. He said to look it up but I've found nothing on it. Anyone have any thoughts or advice?
Appreciate 0
      11-09-2020, 07:10 PM   #16
tracer bullet
Brigadier General
tracer bullet's Avatar
United_States
2294
Rep
3,464
Posts

Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

iTrader: (1)

Eh, depends on you. New to a clutch? Skip it. Have decades of experience? Do it right away.

Some of our line is metal, the other half a seriously heavy duty hose. I doubt a braided line will be noticeable if one even exists for us.
Appreciate 0
      11-10-2020, 09:17 AM   #17
MightyMouseTech
Major General
MightyMouseTech's Avatar
4335
Rep
6,196
Posts

Drives: 13 135i 6MT LeMans Blue MSport
Join Date: Feb 2013
Location: Ottawa, Canada

iTrader: (0)

Quote:
Originally Posted by AUDELA View Post
I asked a technician today if he could perform a CDV delete for me and he advised against it. Said it would actually make the tranny more notchy not less. He said for city driving the CDV delete is not ideal. Instead he suggested putting in braided hose to help make the shifting smoother. He said to look it up but I've found nothing on it. Anyone have any thoughts or advice?
Just remove the CDV. Then the clutch actually does what you want. Will have zero effect on "notchiness ", not even related to that.
Appreciate 0
      11-11-2020, 06:51 AM   #18
AUDELA
Private
AUDELA's Avatar
United Kingdom
2
Rep
65
Posts

Drives: BMW 325i N53 3.0L (E93) 6MT
Join Date: Nov 2020
Location: London

iTrader: (0)

Quote:
Originally Posted by MightyMouseTech View Post
Just remove the CDV. Then the clutch actually does what you want. Will have zero effect on "notchiness ", not even related to that.
A lot of people mention the "notchiness" between 1st and 2nd as a common thing and part of the reason to do the CDV delete. Is this not the case?

Going into 1st and 2nd on mine can definitely be a bit less smooth than I would like. It's on occasion and seems to depend on what rev. But the car is new (to me) so maybe it's just a matter of time to figure out the "sweet spots" ?
Appreciate 0
      11-11-2020, 07:20 AM   #19
MightyMouseTech
Major General
MightyMouseTech's Avatar
4335
Rep
6,196
Posts

Drives: 13 135i 6MT LeMans Blue MSport
Join Date: Feb 2013
Location: Ottawa, Canada

iTrader: (0)

Quote:
Originally Posted by AUDELA View Post
Quote:
Originally Posted by MightyMouseTech View Post
Just remove the CDV. Then the clutch actually does what you want. Will have zero effect on "notchiness ", not even related to that.
A lot of people mention the "notchiness" between 1st and 2nd as a common thing and part of the reason to do the CDV delete. Is this not the case?

Going into 1st and 2nd on mine can definitely be a bit less smooth than I would like. It's on occasion and seems to depend on what rev. But the car is new (to me) so maybe it's just a matter of time to figure out the "sweet spots" ?
Quote:
Originally Posted by AUDELA View Post
Quote:
Originally Posted by MightyMouseTech View Post
Just remove the CDV. Then the clutch actually does what you want. Will have zero effect on "notchiness ", not even related to that.
A lot of people mention the "notchiness" between 1st and 2nd as a common thing and part of the reason to do the CDV delete. Is this not the case?

Going into 1st and 2nd on mine can definitely be a bit less smooth than I would like. It's on occasion and seems to depend on what rev. But the car is new (to me) so maybe it's just a matter of time to figure out the "sweet spots" ?
That's not "notchiness", you just need time to get used to how the clutch releases. "Notchiness" refers to how smoothly the shift lever moves into the next gear.
Appreciate 0
      11-11-2020, 07:25 AM   #20
AUDELA
Private
AUDELA's Avatar
United Kingdom
2
Rep
65
Posts

Drives: BMW 325i N53 3.0L (E93) 6MT
Join Date: Nov 2020
Location: London

iTrader: (0)

Quote:
Originally Posted by MightyMouseTech View Post
That's not "notchiness", you just need time to get used to how the clutch releases. "Notchiness" refers to how smoothly the shift lever moves into the next gear.
That's what I meant. It can be a bit notchy going into 1st and sometimes 2nd. But not all the time. Sometimes even when at a full stop going into 1st isn't the smoothest but mostly it seems to be speed / rev dependent.
Appreciate 0
      11-11-2020, 08:32 AM   #21
BMWCCA1
BMW Owner Since 1971
2236
Rep
1,393
Posts

Drives: 1964 700 Sport Cabriolet
Join Date: Apr 2014
Location: Central Virginia

iTrader: (2)

Garage List
2013 BMW 128i  [10.00]
Quote:
Originally Posted by AUDELA View Post
A lot of people mention the "notchiness" between 1st and 2nd as a common thing and part of the reason to do the CDV delete. Is this not the case?

Going into 1st and 2nd on mine can definitely be a bit less smooth than I would like. It's on occasion and seems to depend on what rev. But the car is new (to me) so maybe it's just a matter of time to figure out the "sweet spots" ?
BMWs (and many cars) have a weakness in the 1st-to-2nd gear synchronizer as it is generally quite a jump in ratios between those gears and that's the gear-change that gets used the most. Missing that shift and crashing the gears and synchros can cause a difficult shift after enough abuse. CDV bypass won't change this problem. You might try matching the revs properly on downshifts into 2nd. And most drivers don't really go into 1st unless they're stopped. You might also try, at a stop, going into 2nd before going into 1st.

But before I'd worry about that, I'd have the transmission fluid changed to what a good BMW shop recommends in your area. Here in the USA that's usually Redline MTL or ATF.
Appreciate 1
AUDELA1.50
      11-11-2020, 09:03 AM   #22
MightyMouseTech
Major General
MightyMouseTech's Avatar
4335
Rep
6,196
Posts

Drives: 13 135i 6MT LeMans Blue MSport
Join Date: Feb 2013
Location: Ottawa, Canada

iTrader: (0)

Quote:
Originally Posted by AUDELA View Post
Quote:
Originally Posted by MightyMouseTech View Post
That's not "notchiness", you just need time to get used to how the clutch releases. "Notchiness" refers to how smoothly the shift lever moves into the next gear.
That's what I meant. It can be a bit notchy going into 1st and sometimes 2nd. But not all the time. Sometimes even when at a full stop going into 1st isn't the smoothest but mostly it seems to be speed / rev dependent.
That is a synco/fluid issue. When was the last time the fluid was changed.
Appreciate 1
AUDELA1.50
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 05:42 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST