Today I removed the clutch delay valve. I'd forgotten about this little doodad and its shenanigans. I removed it from my last S2000 and had forgotten to do it to this one.
What it does is make the clutch softer so if you don't know how to drive you don't put stress on the drivetrain. What it does though is make the clutch feel vague and hard to operate smoothly.
I also polished the ball on the end of the piston to smooth the travel out.
First up, get the car up in the air and remove the clutch slave cylinder. It's on the passenger side of the gearbox and it attached with two 12mm bolts. The banjo for the hydraulic line is a 14mm bolt.
My car is surprisingly clean and corrosion free for 19 years old
I've removed the slave cylinder here. You can see the two bosses where it mounts and the release lever in the top left.
Here is the slave cylinder with the rod removed
You can see the casting marks no the end of it and how it's not smooth.
I stuck it in the lathe and hit it with some sandpaper and some scothbrite.
To remove the delay valve, pop the rubber boot off the valve area next to the bleed nipple.
Pick the snap ring out with a good, angled pick
Pull the delay valve out
Here's the delay valve removed
Put it all back together and bleed the system. Done.
Bleeding the clutch on the S2000 is a bit of a ****. I needed to use a pressure bleeder as it was the only way I was getting any fluid flow.
While I had the bonnet open I treated it to a nice new oil cap and a cover for the VTEC solenoid that was looking very rusty.
By the way, it's only facelift S2000s that have the CDV. Original ones don't have it.