Sticky: (Official) 370Z Clutch Pressure (CSC) Failures

eeblack

Anyone know if the CSC issue was fixed on later model 370's? Haven't been able to find a solid answer yet. I've got a 2019.

Rusty

Nope. Still using the same old parts.

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eeblack

Terrific.

radensb

ZSpeed replacement CSC. Buy one. When the inevitable happens, you can have this one installed instead of the faulty OEM unit. It's an all metal unit and now they sell a kit that includes a new master cylinder. When the CSC fails, it contaminates the fluid which can compromise the master so it's always recommended to change both at the same time. I've had this on my car for 6 years and never had any problems. Clutche is rock solid, 100% predictable, and my fluid has never gotten dirty or contaminated since. The Nissan tech that installed it said that he's never felt a clutch feel so good in one of these cars before. Lol

CSC only: https://zspeed.com/product/zspeed-he...lave-cylinder/

Master and CSC kit: https://zspeed.com/product/zspeed-hd...less-hose-kit/

TPrelude-370z

You can add me to the victims list. I have a 2015 with 15k on the odometer.

Pretty much the exact same story as everyone else. Luckily, I researched prior to having the dealership do anything (thanks to this forum of course). Long story short, I had Nissan replace the fluid, and bleed the line, which obviously didn’t work. They wanted like $2,500 to replace the usual suspects, and he probably added a bunch of things to inflate the bill. I don’t remember, because I wasn’t even listening at that point. I had no intentions of having them do the work, even if the CSC they were replacing it with was a good part, and not made of plastic.

I went through the Nissan complaints/claims process, to no avail. Has anyone ever won one of those battles, and gotten their bill covered for csc/cmc failure, out of warranty? It looks like no, but figured it’s worth asking. I ended up getting the JWT CSC, and OEM master replaced by a 370z mechanic who knew the problem well. It was 1,170 total ($420 for parts $750 for labor). The car is running great. It feels like I’m learning how to drive stick again, because of how soft the clutch became before failing. I had forgotten how high the engagement point was. Is there any harm to removing the assist spring, that I keep reading about?

Basically Nissan is handing everyone who purchases the Z, a bill for 1-2k, before even driving it home. What makes me sick, is they still use the exact same part to this day. I’m a soured with Nissan for good. I would think it would be less expensive to fix the problem and make whole the people who were screwed, than to lose so many loyal Z enthusiasts. When the next Z comes out, we are all going to be thinking, “Okay, what sh!tty part is going to go bad in this car.” And we will 100% know that Nissan will do whatever is in their power to screw you, instead of help. It’s saddening to me.

TreeSemdyZee

Short of reading through this entire thread to try to find the answer (as I’m very flustered at the moment.)

For anyone that has had theirs fail, did anyone notice a pop right before it failed?
I’ve got a RJM clutch arm and I can’t tell if something broke.
I can start the car, but it won’t go into gear. I also noticed when it’s it the fully up position, the arm isn’t touching the upper switch.

I’m sitting here waiting for a tow, in the rain and just trying to get some idea if anyone else has had this same issue?

Edit: Figured it out. I sheared off one of the bolts to the master cylinder.

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40 to 332

Contact Ryan at RJM directly. If the problem resides in the the pedal assembly, he should be able to help.

Ben370

My Zspeed HD CSC just failed after just changing it last year. Probably gonna bite the bullet and get the CMAK this time.

JARblue

That's unusual. Are you sure it isn't just the master cylinder?

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Ben370

Hopefully. I haven't looked into it yet. Just the pedal to the floor symptom.

Edit: Great news! It was just the clutch hose ripped off at the crimp. I would've upgraded to stainless but wanted it back on the road asap so maybe another time.

Cory Gillmore

Honestly I don't think the problem is as widespread as these forums would lead you to believe. My 09 has 115k on the odo and I think it's just now failing. Or maybe it's the fact the clutch fluid has never been replaced...ever.. This morning when I went out to go to work the clutch pedal kinda had some slack in it, didn't stick but yeah... Either way I'm replacing the clutch, flywheel, slave and master in August. This car has been rock solid to me even with me neglecting certain things, like the clutch fluid.

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Fender890

I'm having a bit of a weird issue with my clutch system. I replaced the CMC and CSC about 1.5 years ago.

OEM CMC and and a JWT Heavy Duty CSC.

Today, I notice a softer feel than normal and eventually it got so bad I had to pump the clutch pedal and it would build enough pressure to shift.

I had the dealer do a fluid change and it felt great......for about 30mins. Then back to little to no pressure.

At this point, I believe its the CMC and I don't see any leakage under the car or anywhere on the lines, but I just wanted to see if you guys had any thoughts.

Thanks!

Uxi

My 2015 failed once at under 5000 miles. My 2016 failed twice before 20k and the third time about 40k. Nissan covered the first two under warranty but not the third (did get a case with corporate but bupkis) so I did a Zspeed CMAK. I killed my clutch trying to limp home but still ended up getting towed so replaced that with an OS Giken. Nissan put GTR fluid after the 1st failure and again after 2nd. Mechanic said the master cylinder looked fine but had him replace that, too since Nissan did both times (they replaced the flywheel at least once (the second time) citing contamination but that was covered).

Ordered an RJM since not really happy with the engagement on the new clutch/slave combo.

I DD so don't really drive her too hard. Never launch with no traction or anything. No racing or autox. Will occasionally redline 1-3rd but nothing crazy. Always thought the stock clutch felt a bit weird compared to every other MT I've had, though.