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

MJB

The clutch line has a thermal fiberglass wrap on it, so unless that was removed and the line was actually touching the cat, how is it going to boil under normal street driving? And about your fluid being black, that's because the seal on your Csc was going bad and allowing dirt and debri into the system. If you feel the Dot 5 is a fix, then have at it... But I guarantee you that your stock Csc will fail again.

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09 Nismo #0483 sold. Viper or C7 next time around.

radensb

The fiberglass insulation is a joke. It only insulates the rubber hose that jumps to the CSC. The metal tube that runs up to the MCS is completely un-shielded. Im sure that the stock CSC will go out again, but seals failing after 6 months? I dunno about that. I had no leaks and I am not rough on it. It has to be heat related. How else can you explain regaining a normal feeling clutch after turning the car off for 10 seconds? Then it deteriorating to the point of 'un-shiftable' after another 60 seconds of driving?

I will ask about this when my CSC goes out again. I'm have a 5 year extended warranty that covers this type of failure. I thinking that they will not want to put anything other than stock in or it would void that warranty, blah blah blah... Nevermind that its higher quality and will prevent them having to fix it again in the future.... Warranty Logic.

MJB

The 300zx has the same clutch layout with the line right next to the cat, same with the 350z DE (external slave but clutch line in the same spot)... I don't hear about their CSC going out in record numbers like on here. In fact, the 350z HR and 370 have basically the same csc and both have extremely high failure rates. Like I said before, I believe its the seal within the csc itself. So if its heat related, why aren't guys boiling their clutch fluid when they have a Zspeed HD csc installed? The clutch line is in the same spot, no difference except the csc isn't made out of cheap plastic and uses better seals. But you seem pretty convinced its your fluid that is boiling during normal street driving so have at it. At least you have an extended warranty so when it goes out again Nissan will have to replace it. I had the HD csc installed over 2 years ago and haven't had an issue... Come to think of it, out of the hundreds that have installed the HD csc, I think I've heard of 2 failures.

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09 Nismo #0483 sold. Viper or C7 next time around.

Bananaz

Everyone just needs the Z speed HD CSC..if you keep replacing your failed OEM CSC with another OEM CSC..then shame on you!

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Bananaz

It is the seals on the oem.csc that go bad. Mine was so bad and had so much fluid loss it was slowly dropping out of the trans.. ever since the z speed hd csc no problems. I love it!

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JeMo44

I just had this same issue happen to me yesterday and I'm taking the car in tomorrow since I can't today. Do you guys know if the warranty will cover this issue? I have the extended warranty and maybe this will help?

Bananaz

Yes, this is a warranty item if your warranty is still good. I think it's 5 year or 60k

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JeMo44

Ok thank you... I am slow on work right now and can't purchase the zspeed csc at the moment. Do you know if this issue occurs again, will they recover it as long as I am in warranty? I'd like them to cover the labor and install the zspeed when I have the chance to purchase it.


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JARblue

A dealer won't install the Zspeed one under warranty - they can only install oem parts under warranty. Also, my dealer and corporate both told me that my CSC would not be covered even under the 60K miles powertrain warranty

That's not to say they won't cover it. Just that they told me in my situation it was extremely unlikely to be covered (because I don't spend a lot of $$$ on maintenance at the dealer). There are a variety of people who have gotten them replaced under warranty.

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JeMo44

So I would just be better off replacing it again through them in the event that it happens again up until my warranty is expired.

JARblue

If it's covered under warranty, that would be my choice. Since I was having to fight with them over coverage, I just went the aftermarket route (Z1CSCEK) and did the work in my garage with some help. My CSC was still good, but I didn't want to risk the failure somewhere in rural Texas with no traffic or cell service. And I really didn't want it to fail and then find out that they won't cover it under warranty and then have to scramble to purchase an aftermarket solution while my DD is out of commission.

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mab864

I just lost clutch pressure for the second time today. First time was @ 4500 miles. I had the car towed to the dealer and they did the GTR brake fluid flush which seem to help temporarily. I just had my clutch pedal go almost to the floor today. Still had some clutch engagement about 1" from the floor so I nursed it into the dealer. I've got 9900 miles on it right now. They are replacing the CSC and CMC this time under warranty. They gave me a car too. I did talk the service manager into allowing me to provide the ZSpeed HD CSC and they will install that. I'm pretty happy about that. Also, ZSpeed rocks. I ordered the HD CSC from them as soon as I got back from the dealer and they already shipped it out. Joe at ZSpeed was super helpful. He seemed to think it was my CMC as the CSC ususally completely fails. Hopefully this will make the hydraulic system more reliable. I'm getting leery of taking the Z on long trips.

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JARblue

How the fvck did you get them to do that when they're covering it under warranty? Which dealer please? I have actually turned down warranty coverage because I didn't want the same crappy OEM part installed on my Z - multiple dealers said they can only install OEM parts under warranty.

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mab864

It's Keifer Nissan in Corvallis Oregon. A little too far from TX. I bought my car there and they've been pretty decent so far. They covered my tow bill on the first clutch issue which I understand some dealers do & some don't. I've heard other people have success with talking service managers into installing the ZSpeed CSC, so I'm not the only one. He just said they wouldn't warranty that part of course, but I don't care about that. I get the ZSpeed CSC tomorrow and I'll take it to the dealership so we'll see how things turn out in about a week. Hopefully they have some decent techs at this dealership. This is the first major work I've had done there.

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JARblue

Yeah I wasn't looking for service from them lol. I just wanted to have the name of a dealer I could mention when I ask to have aftermarket parts installed under warranty coverage. Obviously they wouldn't warranty the aftermarket parts.

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