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      07-19-2018, 11:44 PM   #1
Thunderguts
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CDV delete the easy way!

I've only had my 128i for a week and in that week, I've only driven it 4 days. That was long enough for me to hate that loathsome CDV. I read a few DIY posts and figured I would scrape a few knuckles as I tried to break the hose connections on the valve. When my new valve arrived I was surprised to see that it has quick release connectors instead of bolts. Piece of cake!

One post showed the hose being clamped. DON'T DO THAT! It looks just like a brake line to me which means it has stainless reinforcements inside. Once pinched, they are forever compromised. I came up with an easier solution. On the exit side of the valve I plugged it with a foam earplug. That way I could remove the old valve, plug it with my finger, and install the new valve onto the hose with barely any drops leaking. That gave me plenty of time to then work on the other side of the valve. Once that was off, I pulled out the earplug and jammed it into the other side of the fitting. With a snap it was done! I suspect I lost around 1cc of fluid and I didn't damage my hose.

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      07-20-2018, 07:01 AM   #2
Ric in RVA
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The even easier way is to not spend your money on a valve that you simply remove. Instructions here.

There is NO reason to ever buy a CDV delete valve.

https://www.1addicts.com/forums/show...4&postcount=23
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currently e82 less. Seeking 128 i m-sport manual coupe
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      07-20-2018, 08:34 AM   #3
Thunderguts
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You make a valid point, but then I'm left trying to block the inlet hose with something while I knock the restrictor out of the valve. This way I could replace it in 5 seconds. If I had needed to fully flush my brakes and clutch, your way makes more sense.
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      07-20-2018, 08:40 AM   #4
Soterios
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Quote:
Originally Posted by Ric in RVA View Post
The even easier way is to not spend your money on a valve that you simply remove. Instructions here.

There is NO reason to ever buy a CDV delete valve.

https://www.1addicts.com/forums/show...4&postcount=23
Brilliant. I'll probably do this when I have the car up on the ramps for the intercooler next weekend.
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      07-20-2018, 09:09 AM   #5
desertman123
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Lol just remove it and immediately plug the lines into each other, top off the fluid reservoir and give it a quick bleed. You want to bleed it no matter what, you introduced air into the system.

Don't overthink it
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      07-20-2018, 09:41 AM   #6
Thunderguts
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I've lived and learned to expect the worst. If I had just tried to unplug and plug, sure enough I would have gotten a face full of brake fluid. As I was scrambling to get the fluid out of my eyes, my entire reservoir would have drained onto my floor and now I'd have air in the master cylinder which is always a PITA to get out. This way involved very little swearing. My fiancee even commented that it must have gone well since she didn't hear any yelling.

Yes, a bleed is always necessary, but I didn't want to do a full flush.
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