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Excellent bit of info, had this removed yesterday.

I echo Steve G's comments. I thought it was just me making a mess of going from 1st to 2nd.

I've had CDV removed and changed gearbox oil to Redline MTL and Redlline ATF4 in a 50/50 mix as recommended by Opie Oils.

Vast improvement, do it, you won't regret it. Smoother, easier and nicer gear change, my mechanic who is into motorsport (Fords) was sceptical but agreed afterwards.

I'm glad I ran across this topic. Interested in doing anything to improve driving performance. New to the group and I'm really enjoying having this form to learn from. My 03 Z4 2.5 has become the new love of my life. You know you got it bad when you find excuses just to get in the car and drive anywhere.

Does anyone have a picture of the e85 CDV please.

Simon Blythe wrote:Does anyone have a picture of the e85 CDV please.

I'm sure someone will have one knocking around they can post up for you... if not I'm planning to take mine out on the weekend of the 8th/9th April so can post one up for you.

Removed last night and at first wasn't too impressed as the car jumped forward when I raised the clutch. After a few minutes though I realised why people do it - you can essentially "feel" the clutch more now so you can launch it better.
I literally clamp the flexi hose, removed the CDV, reconnected it and drove away

Someone has cottoned onto this I've just seen this for sale https://www.zeckhausen.com/catalog/prod ... cts_id=273

$120

Machine monkey wrote: ↑Fri Apr 04, 2014 1:56 pm Ok i dont have a full grasp so this might not be 100% correct.

But my understanding the CDV is to prevent harsh and sudden shocks causing damage to the DMF. From surges of power from say the clutch being drooped or poor gear changes. Its sole purpose is to protect the DMF from shock.

Trouble is Mat, is slows down engagement of the clutch, masking the bite point and causing slippage that wears the clutch prematurely. Also when you are going for it, it hinders smooth changes.

Mike

Ducklakeview wrote: ↑Sun Oct 22, 2017 4:58 pm

Machine monkey wrote: ↑Fri Apr 04, 2014 1:56 pm Ok i dont have a full grasp so this might not be 100% correct.

But my understanding the CDV is to prevent harsh and sudden shocks causing damage to the DMF. From surges of power from say the clutch being drooped or poor gear changes. Its sole purpose is to protect the DMF from shock.

Trouble is Mat, is slows down engagement of the clutch, masking the bite point and causing slippage that wears the clutch prematurely. Also when you are going for it, it hinders smooth changes.

Mike

Your quoting Matt from over three years ago

Boris wrote: ↑Sun Oct 22, 2017 4:36 pm Someone has cottoned onto this I've just seen this for sale https://www.zeckhausen.com/catalog/prod ... cts_id=273

$120

I think that part is unnecessary as you can just discard the cdv & reconnect the hydraulic pipe without it?
Rob

Smartbear wrote: ↑Sun Oct 22, 2017 6:26 pm

Boris wrote: ↑Sun Oct 22, 2017 4:36 pm Someone has cottoned onto this I've just seen this for sale https://www.zeckhausen.com/catalog/prod ... cts_id=273

$120

I think that part is unnecessary as you can just discard the cdv & reconnect the hydraulic pipe without it?
Rob

Yup, undo it and bin it!

Mike

srhutch wrote: ↑Sun Oct 22, 2017 5:46 pm

Ducklakeview wrote: ↑Sun Oct 22, 2017 4:58 pm

Machine monkey wrote: ↑Fri Apr 04, 2014 1:56 pm Ok i dont have a full grasp so this might not be 100% correct.

But my understanding the CDV is to prevent harsh and sudden shocks causing damage to the DMF. From surges of power from say the clutch being drooped or poor gear changes. Its sole purpose is to protect the DMF from shock.

Trouble is Mat, is slows down engagement of the clutch, masking the bite point and causing slippage that wears the clutch prematurely. Also when you are going for it, it hinders smooth changes.

Mike

Your quoting Matt from over three years ago

Lol didn't realise the big gap before someone pushed again today.

Mike

Yep ditch the CDV and the sh***y dual mass go single mass if you want clutch feel.