Did the CDV removal on my 335i yesterday. Wow!!!

daves335i · 04-01-2007, 07:53 AM

I highly recommend this easy 15 minute DIY for anyone who's been wondering "Why they can't drive a manual anymore...".

Had a 328xi friend describe his 'issue' with the clutch. Drove my CDV-less all but 15 feet, and said 'Now I see the problem.'

Best/easiest mod ever.

STE92VE · 04-01-2007, 10:32 AM

I've seen the DIY but was wondering how much mechanical ability do you really need?

1- Knowing which end of a screwdriver to use?

2- Lefty loosey, Righty tighty?

3- Changing oil yourself?

4- Rebuilding your tranny?

BoostedBMW · 04-01-2007, 11:34 AM

The more that I keep reading about this, the more that I want to do this mod. I have always hated driving cars with CDV's, and the only thing that had me against doing this mod was bleeding the clutch, but that doesn't seem like its too hard to do. So did you just remove the CDV and reconnect the hose or did you replace it with a dummy CDV?

ADHD · 04-01-2007, 11:37 AM

yes i think i may do this as well!!!!//matt what r u doing today???

CASHBY · 04-01-2007, 01:28 PM

hmmmm I might have to do it... only thing is you need 2 people for the clutch bleeding... i dotn have 2 people... might have to GF do it.

CASHBY · 04-01-2007, 01:29 PM

Quote:

Originally Posted by ADHD

yes i think i may do this as well!!!!//matt what r u doing today???

ill do it for you, i need someone to help with mine for the bleeding... we can do them both.

ADHD · 04-01-2007, 01:57 PM

Quote:

Originally Posted by CEA 3

ill do it for you, i need someone to help with mine for the bleeding... we can do them both.

dude clear out your pms!! ive tried to send u a pm and says your shit is FULL!!

CASHBY · 04-01-2007, 03:12 PM

Quote:

Originally Posted by ADHD

dude clear out your pms!! ive tried to send u a pm and says your shit is FULL!!

Done.

daves335i · 04-01-2007, 03:32 PM

Quote:

Originally Posted by BoostedBMW

The more that I keep reading about this, the more that I want to do this mod. I have always hated driving cars with CDV's, and the only thing that had me against doing this mod was bleeding the clutch, but that doesn't seem like its too hard to do. So did you just remove the CDV and reconnect the hose or did you replace it with a dummy CDV?

I had the fortune of having a guy that knows how to bleed the clutch. The removal was easy. We followed the DIY in this forum. A DIY on bleeding a clutch would be great!

but, let me just say again, Wow! What a difference!! Clean, crisp shifts, no extra bouncing or anything!

daves335i · 04-01-2007, 03:33 PM

Quote:

Originally Posted by STE92VE

I've seen the DIY but was wondering how much mechanical ability do you really need?

1- Knowing which end of a screwdriver to use?

2- Lefty loosey, Righty tighty?

3- Changing oil yourself?

4- Rebuilding your tranny?

Its all easy, except for bleeding the clutch, which is easy, but I had a friend who's a fanastic mechanic do it (an Audi Master Mech, in fact).

BoostedBMW · 04-01-2007, 05:41 PM

So how exactly do you bleed the clutch? Anyone want to list some steps? I would assume that you would open up the fluid reservoir, put a tube on the bleeder valve spout into a cup with some brake fluid, open up the bleeder valve a little bit and then pump the clutch pedal. Anyone have some advice?... i've never done this before.

vm · 04-01-2007, 05:59 PM

Clutch bleeding:
To remove large quantities of bubbles I do it indentical to brakes:
1-Pump the clutch
2-Open the bleeder valve (With the transparent hose attached)
3-When no more bubbles are visible stop pumping but leave the clutch pedal pressed.
4-Close bleeder valve.
5-Remove foot from pedal
For the last few bubbles do the following 3 or 4 times:
1a-Pump the clutch pedal 8 to 10 times and leave the clutch pressed.
2a-Open the bleeder valve and see the fluid flow
3a-Close the bleeder valve when fluid stops running
4a-Remove foot from clutch pedal
5a-Go back to step 1a

Always check that you have enough fluid in the reservoir as the clutch line is connected higher than the brake ones.

BoostedBMW · 04-01-2007, 06:07 PM

Thank you very much VM.

Autobot · 04-01-2007, 06:55 PM

So what would happen if you were not to bled it, ie clamp the hose off, remove CDV, replace with dummy one and reconnect then unclam hose? Would the air bubbles eventually work their way out? Or is that a Huge no no?

vm · 04-02-2007, 05:54 PM

You know immediately if hasnt bled properly because it would either not work at all or the release point will be almost on the floor.

teknochild · 04-02-2007, 06:01 PM

hydraulic fluis is hydraulic fluid because it doesnt compress, so force at once location is totally transfered to another, nice because it can be done through hoses and routed at weird angles and location that cant be directly connected

air on the other hand compresses, a lot

so instead of your foot pushing the clutch apart, its going to be compressing air bubbles instead

CASHBY · 04-02-2007, 07:33 PM

Just a note for all....

DO NOT PULL CLUTCH UP WHEN VALVE IS OPEN!!!!!!!!!

Captain Oblivious · 04-03-2007, 11:36 AM

http://www.my330i.com/mod27.php

http://www.bmw325i.net/cdv_removal.shtml

Both of those are for e46s, but the bottom link has really good clutch bleeding instructions

ATG · 04-03-2007, 11:59 AM

Quote:

Originally Posted by BoostedBMW

So did you just remove the CDV and reconnect the hose or did you replace it with a dummy CDV?

+1

ATG · 04-03-2007, 12:03 PM

I've been reading about the CDV removal a lot, but still wondering if removing it can cause the tranny damage (at least in cases when the clutch is dropped at high RPMs). Does anyone have any first hand experience with that meaning any clutch/tranny problem after the CDV removal? Will I need to shift super-smoothly with the CDV removed to avoid the damage that CDV was intended to guard against in the first place?

AR230WAKEBOARDER · 04-03-2007, 12:14 PM

I dont know if the 335i cdv delete is different from the 02 M3 delete, but on the M3 it was VERY easy and didnt require bleeding the clutch.

Maestro · 04-03-2007, 12:58 PM

The other way to bleed the clutch is to go to the part store and by a vacume pump brake bleeder. You attach a hose to the bleeder valve, open it and and begin to pump the vacume pump. Keep pumping until you see no bubbles coming out the bleeder valve then close the valve and your done.

http://store.summitracing.com/egnsea...5&autoview=sku

Some times you can find them cheaper. For someone who does their own work this is a definite tool to have. It saved getting brake fuild getting all over things, and it does not require two people.

04-01-2007, 07:53 AM	#1
daves335i Private First Class 7 Rep 116 Posts Drives: BMW 335i Join Date: Nov 2006 Location: Syracuse, New York iTrader: (1)	Did the CDV removal on my 335i yesterday. Wow!!! I highly recommend this easy 15 minute DIY for anyone who's been wondering "Why they can't drive a manual anymore...". Had a 328xi friend describe his 'issue' with the clutch. Drove my CDV-less all but 15 feet, and said 'Now I see the problem.' Best/easiest mod ever. __________________ 07 BMW 335i Sedan, JB2, Jet Black, Premium, Sport, Heated Seats, Hardwired V1 01 Audi S4 Stage I (APR) (sold) ??-01 Nothing worth mentioning
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04-01-2007, 10:32 AM	#2
STE92VE STEVIL Empire 226 Rep 6,297 Posts Drives: Fast Join Date: May 2006 Location: Long Island, NY iTrader: (0)	I've seen the DIY but was wondering how much mechanical ability do you really need? 1- Knowing which end of a screwdriver to use? 2- Lefty loosey, Righty tighty? 3- Changing oil yourself? 4- Rebuilding your tranny? __________________ 2007 E92 328i 6MT-Space Gray/Black Dakota/Gray Poplar w/heated seats-PCD 4/27/07 (SOLD) 2009 E90 328i xDrive 6AT-Space Gray/Oyster Dakota/Dark Burl Walnut w/ZPP,ZCW,Xenons-ED 4/17/09 - Redelivery 5/30/09 (SOLD) 2014 E84 xDrive28i 8AT-Alpine White/Black Nevada/Silver Matte w/ZMV,ZLP,494 - DD 3/14/14 (SOLD)
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04-01-2007, 11:34 AM	#3
BoostedBMW Moderator 134 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	The more that I keep reading about this, the more that I want to do this mod. I have always hated driving cars with CDV's, and the only thing that had me against doing this mod was bleeding the clutch, but that doesn't seem like its too hard to do. So did you just remove the CDV and reconnect the hose or did you replace it with a dummy CDV? __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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04-01-2007, 11:37 AM	#4
ADHD Brigadier General 251 Rep 4,201 Posts Drives: F30 328i Join Date: Apr 2006 Location: Magic Mountain iTrader: (38) Garage List 21 M540i [0.00] 07 e90 335 [0.00]	yes i think i may do this as well!!!!//matt what r u doing today??? __________________
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04-01-2007, 01:28 PM	#5
CASHBY 170 Rep 2,114 Posts Drives: E90 335 "done up" Join Date: Dec 2006 Location: GARAGE iTrader: (2)	hmmmm I might have to do it... only thing is you need 2 people for the clutch bleeding... i dotn have 2 people... might have to GF do it.
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04-01-2007, 05:41 PM	#11
BoostedBMW Moderator 134 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	So how exactly do you bleed the clutch? Anyone want to list some steps? I would assume that you would open up the fluid reservoir, put a tube on the bleeder valve spout into a cup with some brake fluid, open up the bleeder valve a little bit and then pump the clutch pedal. Anyone have some advice?... i've never done this before. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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04-01-2007, 05:59 PM	#12
vm Second Lieutenant 11 Rep 239 Posts Drives: 2018 Alfa Romeo Giulia Join Date: Dec 2005 Location: Pittsburgh, PA iTrader: (5)	Clutch bleeding: To remove large quantities of bubbles I do it indentical to brakes: 1-Pump the clutch 2-Open the bleeder valve (With the transparent hose attached) 3-When no more bubbles are visible stop pumping but leave the clutch pedal pressed. 4-Close bleeder valve. 5-Remove foot from pedal For the last few bubbles do the following 3 or 4 times: 1a-Pump the clutch pedal 8 to 10 times and leave the clutch pressed. 2a-Open the bleeder valve and see the fluid flow 3a-Close the bleeder valve when fluid stops running 4a-Remove foot from clutch pedal 5a-Go back to step 1a Always check that you have enough fluid in the reservoir as the clutch line is connected higher than the brake ones.
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04-01-2007, 06:07 PM	#13
BoostedBMW Moderator 134 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	Thank you very much VM. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
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04-01-2007, 06:55 PM	#14
Autobot Brigadier General 86 Rep 3,104 Posts Drives: 15 F22 M235 6MT Join Date: Feb 2007 Location: Charleston, SC iTrader: (8)	So what would happen if you were not to bled it, ie clamp the hose off, remove CDV, replace with dummy one and reconnect then unclam hose? Would the air bubbles eventually work their way out? Or is that a Huge no no?
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04-02-2007, 05:54 PM	#15
vm Second Lieutenant 11 Rep 239 Posts Drives: 2018 Alfa Romeo Giulia Join Date: Dec 2005 Location: Pittsburgh, PA iTrader: (5)	You know immediately if hasnt bled properly because it would either not work at all or the release point will be almost on the floor.
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04-02-2007, 06:01 PM	#16
teknochild Your resident 4um troll 137 Rep 2,020 Posts Drives: 335 coupe Join Date: Dec 2006 Location: fl iTrader: (0)	hydraulic fluis is hydraulic fluid because it doesnt compress, so force at once location is totally transfered to another, nice because it can be done through hoses and routed at weird angles and location that cant be directly connected air on the other hand compresses, a lot so instead of your foot pushing the clutch apart, its going to be compressing air bubbles instead __________________ RAWRrrrr
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04-02-2007, 07:33 PM	#17
CASHBY 170 Rep 2,114 Posts Drives: E90 335 "done up" Join Date: Dec 2006 Location: GARAGE iTrader: (2)	Just a note for all.... DO NOT PULL CLUTCH UP WHEN VALVE IS OPEN!!!!!!!!!
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04-03-2007, 11:36 AM	#18
Captain Oblivious My car is for sale 7 Rep 239 Posts Drives: slowly for max fuel economy Join Date: Jan 2007 Location: Cary, NC iTrader: (0)	http://www.my330i.com/mod27.php http://www.bmw325i.net/cdv_removal.shtml Both of those are for e46s, but the bottom link has really good clutch bleeding instructions __________________ 2008 E90 335i: Alpine White \| Terra \| Burl \| Sport \| Premium \| Nav \| iPod \| Heated Seats - Sold 2004 E46 325ci: \| Titanium Silver \| Gray \| Burl \| Sport \| 5sp - Sold
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04-03-2007, 12:03 PM	#20
ATG Major 74 Rep 1,058 Posts Drives: f30 328 xdrive, e90 335i gone Join Date: Feb 2007 Location: Eastside iTrader: (0) Garage List 2013 BMW 328i xdrive [0.00] 2007 e90 335i [0.00]	I've been reading about the CDV removal a lot, but still wondering if removing it can cause the tranny damage (at least in cases when the clutch is dropped at high RPMs). Does anyone have any first hand experience with that meaning any clutch/tranny problem after the CDV removal? Will I need to shift super-smoothly with the CDV removed to avoid the damage that CDV was intended to guard against in the first place?
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04-03-2007, 12:14 PM	#21
AR230WAKEBOARDER Private First Class 4 Rep 144 Posts Drives: MONTEGO BLUE 335I Join Date: Mar 2007 Location: Why? iTrader: (0)	I dont know if the 335i cdv delete is different from the 02 M3 delete, but on the M3 it was VERY easy and didnt require bleeding the clutch.
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04-03-2007, 12:58 PM	#22
Maestro Major 1054 Rep 1,268 Posts Drives: 2007 335i Sedan, 2021 X3 Join Date: Nov 2006 Location: Philadelphia iTrader: (0)	The other way to bleed the clutch is to go to the part store and by a vacume pump brake bleeder. You attach a hose to the bleeder valve, open it and and begin to pump the vacume pump. Keep pumping until you see no bubbles coming out the bleeder valve then close the valve and your done. http://store.summitracing.com/egnsea...5&autoview=sku Some times you can find them cheaper. For someone who does their own work this is a definite tool to have. It saved getting brake fuild getting all over things, and it does not require two people.
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