Clutch Issues

[Jacob1023]

I bought the car 1.5 years ago.

S14 Chasis with S15 SR20DET

I've had clutch issues since day one.

The car came with a blitz twin clutch. Made awful racket when disengaged (from research due to the plate chatter)

One day it finally just wouldn't go into gear anymore. After oulling the tanny and engine didnt see any reason of why the system shouldnt of works. Wear was minmal.

Replaced this noisey clutch with a new setup. Driftworks solid flywheel and s14 spec stage 3 clutch. This is what driftworks said to use with their flywheel.

About 1000 miles later the TO bearing is making noise. Yes it was the chinese one that came with the spec clutch.

Pulled engine and tranny and replaced TO with OEM and went ahead and replaced the pilot with NISMO roller bearing pilot. After hell of mating these engine and tranny I noticed something putting everything back together.

The slave cylinder is bottomed out with the clutch engaged. And thinking about this with this new clutch shouldnt be this way, because after time of wear the fork is going to return more than what it would with new clutch.

This also brought me back to a possible reason why the slightly worn blitz dual clutch had issues as well.

The slave is a 3/4 slave.

Anone have any suggestions one this. What kind of play do you normally see between a fully returned slave and fork with new clutch?

[Jacob1023]

Maybe some reference measurements. Such as from the clutch fork cutout to the fork fully engaged or slave push rod length.


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[jr_ss]

The FSM has all these answers in one place. I believe Nicoclub has them hosted somewhere for your convenience.

[Jacob1023]

I looked there already. I already got it saved to my desktop.


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[Jacob1023]

Pulled the engine and tranny back out. Visually everything looks good. Does anyone have some measurements such as engine mating surface to top of clutch spring?


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[jr_ss]

What TOB sleeve is on the transmission? What transmission are you running? Is it the 6spd? Does everything work? If so, what are you concerned with?

Twin plate clutches will always have racket, that isn't cause for concern or replacement, so long as the guts are all within spec.

[Jacob1023]

S15 6 speed tranny, s14 TO bearing, driftworks solid flywheel, s14 spec 3 clutch, and I have no idea which sleeve.

With clutch engaged slave cylinder is hard stopping from full return of clutch spring with new clutch.


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[Jacob1023]

Spec gave me a hand on checking the flywheel and clutch stack up. ~100 mm from engine/tranny mount surface to TO contact on clutch. So it is good. Then we got into the TO sleeve. They pointed out mine was too long compared to what they had. Mine is 30 mm which I got no idea what this is for not why PO would use it. With the help of the following table I got everything back in line. 82299

FYI. Spec gets an A++ for their support. Couldn't of done it without them.




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[jr_ss]

Glad to hear it wasn't too complicated. It seems the TOB sleeve and TOB cause a lot of issues such as you've witnessed.