Cdv removal

C

chuckmiester

Member
 A yorks
Thinking of doing the CDV delete. Does the clutch need bleeding afterwards and if so where is the bleed nipple?
Thanks in advance
 
Marlon said:
No, you don't have to bleed the clutch - do a search on the forum to find out how
Click to expand...
Why would you not?
If there is a chance that air has entered the system would it not make sense to bleed it to make sure?
 
Nictrix said:
Marlon said:
No, you don't have to bleed the clutch - do a search on the forum to find out how
Click to expand...
Why would you not?
If there is a chance that air has entered the system would it not make sense to bleed it to make sure?
Click to expand...
Okay, let me clarify; I haven't personally done this, however I have read many 'CDV delete' threads by members who have successfully removed it without bleeding the clutch.
 
I'd definitely bleed the clutch, and run some fluid through it, it uses the bake fluid and if it's anything like mine it will be pretty manky, the nipple is right next to the CDV if I remember correctly.
 
I bled mine out and replaced the fluid when I removed the CDV. It's the same reservoir and fluid as the brakes, the bleed nipple is a bit awkward to reach but not difficult.
 
Marlon said:
Nictrix said:
Marlon said:
No, you don't have to bleed the clutch - do a search on the forum to find out how
Click to expand...
Why would you not?
If there is a chance that air has entered the system would it not make sense to bleed it to make sure?
Click to expand...
Okay, let me clarify; I haven't personally done this, however I have read many 'CDV delete' threads by members who have successfully removed it without bleeding the clutch.
Click to expand...
I have read some of these threads and although people might not have any problems is it really worth it for an extra 5 minutes bleeding it.
I don't think I would want to advise someone that it doesn't need done though.
 
mjennings23 said:
I bled mine out and replaced the fluid when I removed the CDV. It's the same reservoir and fluid as the brakes, the bleed nipple is a bit awkward to reach but not difficult.
Click to expand...

:thumbsup:
 
The actual CDV removal and clutch bleed are very easy. Access is a bit of a pain, but nothing too difficult.

If you're working under the car, (not up on a garage ramp), make sure you have all what you need with you under the car, including some rag and paper towels.
 
Has anyone replaced the entire hose with a CDV-delete item?

I'm looking at this:
https://auto.helperformance.com/bmw-1-series-e81-e82-e87-e88-all-variants-11628

Doesn't mention E85/E86 but the Hack Engineering item shows that it fits nearly all models with a CDV:
http://www.hackengineering.co.uk/product/hack-engineering-braided-clutch-line-models/

Any experience here?
 
There was no need to fit a longer pipe or drill out the CDV on my car (M54B30) the existing pipe was long enough to fill the gap.
 
I never needed to do mine at all. Pedal was exactly the same afterwards. Although bleeding it definitely won't hurt.
 
Where are all the forum members who delete CDVs in 5 mins by clamping the hose without bleeding the clutch and never had an issue? This was the de-facto method IIRC, I'm sure I didn't imagine it :? :D
 
I thought I’d read that somewhere as well. Surely if you just clamp the hose the only thing you’ll do is stop fluid leaking out. Your still going to get air in the system. I might have a go at it tomorrow seing as the weather is so good.
 
Marlon said:
Where are all the forum members who delete CDVs in 5 mins by clamping the hose without bleeding the clutch and never had an issue? This was the de-facto method IIRC, I'm sure I didn't imagine it :? :D
Click to expand...

I did mine last weekend, clamped the pipe, 5 minute job and no bleeding after
 
Would any of you clamp a brake line, remove the brake hose, put it back on again and not bleed the system?
Why wouldnt you do the same for the clutch?
Unless I am missing something there is a chance air could get in to the system so should be bled out.
 
Nictrix said:
Would any of you clamp a brake line, remove the brake hose, put it back on again and not bleed the system?
Why wouldnt you do the same for the clutch?
Unless I am missing something there is a chance air could get in to the system so should be bled out.
Click to expand...
I definitely wouldn't with brakes, but as they impact safety, they're a very different case. The CDV seems to be at pretty much the lowest point of the clutch hydraulic circuit, so I wouldn't be surprised if any air made its way back up to the reservoir, hence nobody having issues. Clutch actuation is a very different process to brake pressure modulation, which probably explains why people haven't noticed a problem following CDV removal.
 
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