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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-02-2007, 12:19 PM   #1
FullEffect256
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CDV Delete: Buy the part? or just remove?

when getting rid of the CDV, what's the difference between replacing it w/ a "gutted" one and just removing it all together? I have a 2004 330i ZHP. Also, u can just use brake fluid as clutch fluid rite? Thanks!
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Old 06-02-2007, 12:25 PM   #2
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If you replace it with a dummy you won't risk crimping the line or your warranty.
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Old 06-03-2007, 11:40 AM   #3
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I just took mine out. I believe the clutch uses fluid from the brake master cylinder. So just make sure that you replace the fluid you bleed off.
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Old 06-03-2007, 12:39 PM   #4
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would it be possible to just to take the CDV valve out, drill it out and put it back in? wouldn't that be that same as buying the actual part that cost like 30 bucks?
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Old 06-03-2007, 12:58 PM   #5
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you could run the risk of metal flaking in your system. best you let the pros do it. ^
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Old 06-04-2007, 09:38 PM   #6
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i was thinking, remove the piece, put it in a drill press. use a small drill bit to drill it out. Of course you would clean it with wd-40 or some other type of parts cleaner before reinstalling it to avoid metal parts flaking off into your system.
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Old 06-04-2007, 10:01 PM   #7
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i was thinking, remove the piece, put it in a drill press. use a small drill bit to drill it out. Of course you would clean it with wd-40 or some other type of parts cleaner before reinstalling it to avoid metal parts flaking off into your system.
tell me how it goes and i might send it to you. if you can beat the 30 dollar drilling price for the the website.
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Old 06-05-2007, 01:40 AM   #8
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why drill it and not keep it in case you need to put it back. if your tranny fails the dealer might blaim the missing valve.. would you risk for $30?

I bought an empty one and kept the original
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Old 06-05-2007, 01:51 PM   #9
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Just replace the whole line with an SS line. Cheap little upgrade.
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Old 06-05-2007, 07:43 PM   #10
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Drilling it out yourself and cleaning it good should be okay. Mine is out of warranty so I am not trying to full anyone by putting ti back in.
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Old 06-05-2007, 10:39 PM   #11
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ordered the modified valve and installed it today... car drives great... do you think the dealer will notice/care about the changed valve? don't see how it harms anything
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Old 06-05-2007, 11:38 PM   #12
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it slows the reaction (in this case from dropping the clutch) and shock to the driverterrain
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Old 06-23-2008, 07:33 PM   #13
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where's the CDV DIY?
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Old 07-25-2008, 09:52 AM   #15
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CDV Removed. Big improvement in clutch engagement feel.
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Old 08-01-2008, 02:53 AM   #16
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Any one know how important the power bleeder is for the CDV removal??? It just turns this DIY from free to a lot more $...
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Old 08-01-2008, 06:31 AM   #17
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Any one know how important the power bleeder is for the CDV removal??? It just turns this DIY from free to a lot more $...
It's not important if you know how to bleed clutch and brakes properly and have a friend who can press a pedal up and down when you tell them.

I used a drain tube with a one way valve that's cheaper than a pressure system, but does mean in between opening each bleed nipple you have to pump the pedal a few times, then top up fluid reservior. It's easy enough though. You don't have to bleed the brakes at the same time, but I thought as I had the car jacked up and was messing with brake fluid, drain tubes and stuff I may just as well take the wheels off and bleed the brakes at the same time.

You still can't do it for free, there's some cost and preparation involved, but yes it's cheaper without a power bleeder:
http://forum.e46fanatics.com/showpos...5&postcount=17
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Old 08-01-2008, 10:53 AM   #18
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or just for fun you can make your own power bleeder. Good for Clutch and Brake bleeding.

http://forum.e46fanatics.com/showthread.php?t=513282

http://www.bmw-m.net/TechProc/bleeder.htm
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Old 08-03-2008, 05:19 PM   #19
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or just for fun you can make your own power bleeder. Good for Clutch and Brake bleeding.

http://forum.e46fanatics.com/showthread.php?t=513282

http://www.bmw-m.net/TechProc/bleeder.htm
I had a pressure bleeder once, Gunson's I think it was, it used to hook up to a spare tyre to get the pressure. I found the job easier to do without hooking up a pessure bleeder, and as for making one, I could do the entire job quicker than I could make one so nah, not for me.
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Old 08-11-2008, 03:10 PM   #20
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Gonna do this and the clutch stop at the same time

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