tintoverano
Active member
I saw many posts and videos, but each was lacking some details here and there, hence a How To (not being a mechanic, as most of us, this may help other newbies like myself)
the result: reading some of the excited posts I was sceptic about the potential impact, I mean it couldn't be that good/bad - I have to confirm my mates, I got a brand new clutch experience now and it is mighty good
today is the 2nd day after the mod, I did a hilly test drive (wanted to cool down) - the difference is literally shocking, therefore I couldn't
the steps
0. have a friend around who can help with the second part (bleeding) - though you won't need her if you did it again for some reason
1. get 0.5 litre DOT4 brake fluid and fill the reservoir above max (there's gonna be spillage for sure, but don't worry)
2. lift the car (jacking up only will make you suffer along the way) - wear gloves, glasses to protect yourself
3. remove two bottom engine covers to find your CDV:
View attachment 4
4. before removing the factory installed valve apply a hose pinch
the result: reading some of the excited posts I was sceptic about the potential impact, I mean it couldn't be that good/bad - I have to confirm my mates, I got a brand new clutch experience now and it is mighty good
today is the 2nd day after the mod, I did a hilly test drive (wanted to cool down) - the difference is literally shocking, therefore I couldn't
the steps
0. have a friend around who can help with the second part (bleeding) - though you won't need her if you did it again for some reason
1. get 0.5 litre DOT4 brake fluid and fill the reservoir above max (there's gonna be spillage for sure, but don't worry)
2. lift the car (jacking up only will make you suffer along the way) - wear gloves, glasses to protect yourself
3. remove two bottom engine covers to find your CDV:
View attachment 4
4. before removing the factory installed valve apply a hose pinch
- this will do, nothing fancy https://www.kingtony.com/product_detail.php?uID=13&cID=61&Key=1502
View attachment 3
so you don't lose much brake fluid after disconnecting the hose and the valve
View attachment 2
5. the valve is locked in by two push ring locks at both ends of it
View attachment 1
6. pull up the ring locks, use e.g. a screwdriver, to release the valve ends and remove the valve
7. insert the new valve- I bought a modified valve: https://www.sound-pressure.de/BMW-Drosselventil-CDV-21526765120, some say you don't need it and just connect the hose back
8. remove the hose pinch and you must bleed the clutch circuit now to get rid of the air, which got stuck inside
9. remove the rubber cap from the bleeder (see above) and connect the vacuum bleeder- I went for this one https://lincos.tools/2926-vacuum-pressure-test-kit.html
[youtube]xd-B8SifQj4[/youtube]
it will be harder though, since the car is higher up, and you need to hold the pump, pump it and open the bleeder screw at the sam time - the need for a friend
10. wipe the valve clean with a rug, so you can see if there's any leakage, after doing the next step
11. lower your car until you can reach the clutch pedal with your hand, then start pumping it 5-10 times, check its stiffness- if it seems OK, lift up your car, check the valve for leakage and put back everything, because you're ready with the CDV Delete
- if it doesn't feel OK, e.g. the pedal doesn't come back up or you hear the sound of spillage, look under the car for fluid and check if you connected the hose and the valve the right way and repeat the steps till the pedal is stiff and there's no brake fluid leakage
- start with re-filling the reservoir above max
12. when your car is down check the brake fluid level in the reservoir - there's a sensor, but it doesn't hurt to see it with your own eyes
cause for some reason that always seems clunky!
