Desperate for clutch bleeding help

Pheonix

As a matter of an update for anyone who cared, we had several more gearheads come over and spend a few hours attempting different methods of bleeding.

The general consensus now is that it is in fact the Master Cylinder, and I suppose one way or another we'll know for sure tomorrow night when the new piece goes in.

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"The line dividing good and evil cuts through the heart of every human being." - Aleksandr Solzhenitsyn

JARblue

Sorry to hear man. GL with the fix

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JARblue

It looks like an OEM CMC is your only option at this point. ZSpeed was working on an aftermarket one, but it is still on the back burners apparently.

This thread is the only documentation I could find where someone is using an aftermarket CMC without having to remove the ABS module.

Prototype Aftermarket Clutch Master Cylinder - INSTALLED!

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Pheonix

Yessir...spent plenty of time looking (wastefully, as it happens) for an aftermarket upgrade, and I'm truly surprised that there doesn't seem to be one. Z1 claims recorded CMC failures are so low that there's no market for it...but I find that hard to believe.

At any rate, the things described here about MC failures seem to sync up with my own experiences...things like on hard launch the clutch getting stuck to the floor with a redlining engine until pumped a few times...this only happened two or three times total over the last few months, but it did happen...and how when bleeding the resistance feel would build to a certain pressure near full release and then resistance would start to disappear.

Somewhere else a ZSpeed guy says ""Once you open the system, if the master cylinder is weak it will not work correctly." when telling someone why they recommended buying one with a CSC...something I'd wish I'd known.

I'm trying not to latch into this as my sole hope, but if it doesn't work I just don't know what else to think. My buddies seem to think this'll solve it, so I'm hanging my hat on it.

We'll see tomorrow!

Side note: today, my buddy's 370 CMC also crapped out. Not completely; he's still got enough travel room to grab gears and shift, but it's very, very weak compared to last night.

Something is in the air here

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"The line dividing good and evil cuts through the heart of every human being." - Aleksandr Solzhenitsyn

JARblue

To be honest, my clutch pedal got soft a few months ago. Replacing my clutch pedal with the RJM assembly this past weekend seems to have made it more noticeable :\

I was expecting the CSC to go out first. I guess replacing the CMC is easy enough, I can do that if it really starts to bug me and the CSC is still OK. Or I can just wait until I need clutch/transmission work and replace it all. Or maybe I should start doing hard launches off the stoplight lines to help nudge it along toward failure

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Pheonix

The CMC is certainly less trouble than the CSC. Had to remove two screws from the ABS that were in the way but that was probably the hardest part next to the Lin, which just seemed to be frustrating.

Might as well get it done, mate....before it goes all the way out. Don't play with fire.

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"The line dividing good and evil cuts through the heart of every human being." - Aleksandr Solzhenitsyn

Pheonix

We just threw in a new master cylinder and as was predicted...from the very first pump on bleeding the effect was noticeable...and we were finished bleeding I'd say within 10 minutes.

So I don't care how many low miles you have on that pretty little Z, here's the advice I really wish someone had given me when I upgraded my clutch, flywheel and CSC...just do yourself a favor and go ahead and buy a new master cylinder as well. You may not need it, you may need it and not even know it, but there's a solid chance that when you crack that system open you're going to ruin the one you do have and you'll wish you'd have bought one anyway.

You're spending that kinda cash on upgrades anyway, an extra 110 or so won't break you. Just save yourself the trouble and buy it and throw it in there, and even if you didn't need it you'll have bought yourself extra longevity anyway.

Feels soooooo goooooood to be driving my little fair lady again. Taking it easy during the break-in is going to be rough after so long outside of her...but she'll be broken in by ZDayZ.

See ya'll in the mountains next week!

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"The line dividing good and evil cuts through the heart of every human being." - Aleksandr Solzhenitsyn

ValidusVentus

How is the CMC ruined by breaking open the system? Not doubting you, just confused. Is it possible that air got into the system that you couldn't get out without taking it all apart? Where did you source the new CMC, Nissan?

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