CDV Vote remove or Mod

[Anonymous]

Ok, been researching the CDV mod thingy and as best I can tell is that this certainly is something I need to do.
Problem is there seems to be mixed feeelings about whether or not to mod it or remove it, and the general school of thought is that
if no warranty remains on the vehicle then just remove it, I can't see any benifit to just Moding the thing apart from warranty issues.
There is no longer any warranty on my Z.

However I joined this forum primarily for advice and to learn more about my car and have come to notice that there are alot of you out there who do actaully know your stuff. I have already read all the threads I can about this as well as other forums and have decided to let you guys decide for me if you would be so kind as to oblige me with your vote. as to either REMOVE or MOD :? :?

I am going to do the work this weekend so will run the poll till friday

 

[Anonymous]

Hi Mate,

Don't think it makes much difference. I bought a modded valve from the US, but removal gives same result.

 

[MrGringo]

Given it is SO easy to mod yourself, and you don't have to worry about finding a cable to go from the thicker cable to the thinner cable, I'd mod it.
Once you've removed it from the car, just put it in a vice and use a hammer and punch to get the internal pieces out. It's stuck in there well but it does come out. The instructions on here are good. I bought a new one and did it to that, then modified my original and sold it on here. There really was no need to buy a spare like I did.

 

[Andy]

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=15812&p=231294

 

[Booner]

Given it is SO easy to mod yourself, and you don't have to worry about finding a cable to go from the thicker cable to the thinner cable, I'd mod it.
Once you've removed it from the car, just put it in a vice and use a hammer and punch to get the internal pieces out. It's stuck in there well but it does come out. The instructions on here are good. I bought a new one and did it to that, then modified my original and sold it on here. There really was no need to buy a spare like I did.

Ahhhh I am scared of doing this to my M, don't suppose anyone can recommend a specialist near oxford?

 

[MrGringo]

I will PM you the exact details of the garage I used. The guy you want is Lee and is a good friend of mine.

 

[Booner]

Thanks Gringo!

 

[Anonymous]

Given it is SO easy to mod yourself, and you don't have to worry about finding a cable to go from the thicker cable to the thinner cable, I'd mod it.
Once you've removed it from the car, just put it in a vice and use a hammer and punch to get the internal pieces out. It's stuck in there well but it does come out. The instructions on here are good. I bought a new one and did it to that, then modified my original and sold it on here. There really was no need to buy a spare like I did.

I will PM you the exact details of the garage I used. The guy you want is Lee and is a good friend of mine.

:? :? :? :?

Confused, Did you do the Mod or did you get the garage to do it?

 

[Anonymous]

Hi,

Tbh, you try to mod, you could mess it up (several have) and you have to get the dam thing out as well, which means you have to jack car up safely etc, clutch fluid bleed etc, unless you have a 4 poster, lol.

I would buy the modded part , take car to garage, get them to do it, or just get them to take the valve off, there is unlikely to be any difference in overall result judging by the polls, it's just personal choice and hastle factor, job done 30 mins or so, wont cost much.

Steve

 

[Anonymous]

I would buy the modded part , take car to garage, get them to do it, or just get them to take the valve off, there is unlikely to be any difference in overall result judging by the polls, it's just personal choice and hastle factor, job done 30 mins or so, wont cost much.

Steve

If Opt to do the Mod (Looks like the vote is going that way) i will prob try to mod it myself and if it f**ks up then i will prob remove it, Only place i can find to buy a pre-modded valve is from the states and they want $78 just to ship the thing, I don't mind paying but that is just takin the p*iss, However a M8 at work has a friend visiting from the states in July and has agreed to buy it over there and bring over here with her, so I may just hang off till then. As for fitting it myself and bleeding the system etc is a ten minute job as the car would be on stands anyway to replace the valve. Grudge paying a garage to do something i can do myself, I am Scottish so therefore every penny is prisoner :wink:

 

[konas]

Hi, voted for removed, eventhough my car never had it.... :? since new

 

[MrGringo]

Given it is SO easy to mod yourself, and you don't have to worry about finding a cable to go from the thicker cable to the thinner cable, I'd mod it.
Once you've removed it from the car, just put it in a vice and use a hammer and punch to get the internal pieces out. It's stuck in there well but it does come out. The instructions on here are good. I bought a new one and did it to that, then modified my original and sold it on here. There really was no need to buy a spare like I did.

I will PM you the exact details of the garage I used. The guy you want is Lee and is a good friend of mine.

:? :? :? :?

Confused, Did you do the Mod or did you get the garage to do it?

I went in with the instructions, he put the car on a ramp, took the old one off and then we modified the CDV as described above and he fitted it for me.

 

[lacroupade]

I will PM you the exact details of the garage I used. The guy you want is Lee and is a good friend of mine.

Is that the guys at Didcot? Planning to put mine in there for service shortly...

 

[MrGringo]

Nope, East Oxford Garage just off the Oxford ring road.

 

[Rudd]

i removed mine, took about 20mins and i have no mechanical experience whatsoever.

1. jack the car up and use axle stands - safety
2. clamp off the flexible hose with mole grips and 2 bits of wood so you dont put too much pressure on one spot.
3. loosen the CDV from the hose using 2 spanners
4. remove the CDV from the hose at the other end.
5. put the hoses together - they are made to go together, i think the CDV was something of an add-on.
6. bleed the clutch a little - easy as you clamped off the hose and didnt waste fluid
7. cup of tea then get back under and check for leaks
8. lower the car and drive

 

[Anonymous]

i removed mine, took about 20mins and i have no mechanical experience whatsoever.

1. jack the car up and use axle stands - safety
2. clamp off the flexible hose with mole grips and 2 bits of wood so you dont put too much pressure on one spot.
3. loosen the CDV from the hose using 2 spanners
4. remove the CDV from the hose at the other end.
5. put the hoses together - they are made to go together, i think the CDV was something of an add-on.
6. bleed the clutch a little - easy as you clamped off the hose and didnt waste fluid
7. cup of tea then get back under and check for leaks
8. lower the car and drive

Cheers Rudd simple straight forward How to. However instruction 7,... will this still work if i have coffee instead oke:

 

[a11y]

Those instructions sound quite simple, but the only thing stopping me removing mine (54-plate non-warrantied Z4) is not knowing how to bleed the clutch! Can anyone point me in the direction of a guide to do this on the Z4? It's not the type of job I've considered before - an oil change is the extent of my under-bonnet experience...

Oh, and I agree: coffee > tea oke:

 

[Rudd]

coffee or tea usually doesnt effect the final result guys, beer on the other hand might


to bleed the clutch.

once everything is back together go and hunt for a friend and get them to sit in the car.

get under the car and armed with a IIRC 7mm ring spanner find the bleed nipple on the clutch. it is just above the cdv and has a little rubber cover the same as the one on the brakes.

1. make sure you have a rag or tray under the car
2. Loosen the bleed nipple and get a mate to push the pedal
3. Once the pedal is down tighten the nipple immediately, once tight then release the clutch pedal
4. Repeat until no bubbles come out of the clutch hose, just smooth fluid.

NOTE: the clutch fluid may come through smooth at first but this is because of the amount left in the line closest to the nipple, repeat the above about 10 times and you should be ok.
The reason for clamping off the hose in the first place is so that all of the clutch fluid doesn’t drain out.

5. Once you are happy you need to test the feel of the clutch to make sure it hasn’t gone soft, make sure everything is tight then lower the car and test.

Another celebratory tea, coffee or beer and you’re done

 

[a11y]

Ah, thanks very much Rudd. I've bled hydraulic brakes on my mountain bikes and it's the identical process for Hope brakes (Shimano's slightly different) that I previously used and bled. I, embarrassingly, didn't actually know where to bleed the clutch from but I guess it'll be fairly obvious once under the car? i also need to find the fluid reservoir under the bonnet just in case I need to top it up...

 

[Anonymous]

Nice one Rudd,

Hey ally, I'll help you if you help me.