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

jstevenson

no, just the cylinders, hoses, and connectors and clutch cover

Jsolo

Strange. Clutch cover meaning pressure plate? Wonder why it would need replacing if the friction disk is not replaced... Got your RO handy, what does it list for the parts?

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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring

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martin82

jstevenson, yeah I stopped by there and saw your car, I have the same issue and tranny shifts very rough, grinds 5th, locks out gears etc. Who was ur service advisor's name? Maybe I just call him and make an appointment with him. They told me 1 week, problem is I'm not sure if my car will fit on their lifts...

jstevenson

Julio was my guy. Though I also worked with the service director Steve.

I'm sure they can fit and work on your car.They had mine in parts within a day or two, but then were waiting on replacement parts to come in.

jstevenson

I'll check when I get back to the car.

jstevenson

Just checked it out, they did replace the disc.

Parts:

CYL ASMY
Tube
Hose
Cylinder
ASMY
Cover ASMY-Clut
Brake Fluid

Description was Clutch Salve Cylinder leaking, found pedal stuck to floor, clutch reservoir empty, CSC operating cylinder leaking. Techline recommended CSC operating cylinder, clutch tube, clutch hose and msster cylinder. Upon inspection found clutch disc and cover contaminated with clutch fluid. Performed replacement of disc, cover, csc operating cylinder, clutch tube, clutch hose and master cylinder. Bled clutch. Re-inspected and performed road test. Ok.

Jsolo

Good deal. Makes sense though. If leaking CSC damaged the friction disk, then its replacement should be warrantied.

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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring

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ZForce

My bad, thought I read you got the car used. Freak of nature I guess...oh wait I am reallly missing your previous threads, thought you had the same part failed as mine and NOT the CSC....CSC...MSC...all get me confused in this acronym world.

Mine was the simplier fail and fix,yours full blown. Glad you got it back. Time for a blood transfusion on all body parts.

simota1

add me to the list fellas... pulled in to my driveway today and that was it... pedal fell to the floor couldnt get it in anygear at all except when i put it in gear prior to starting it and thats how i got to park her.... ill check my fluid tomoro but looks like ill be getting a slave.... i felt it coming a fews months back but was optimistic that it would last till next year...

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DIGItonium

I can't wait for the availability of the master cylinder for our cars like the one Joe offers for the 350Z. My clutch pedal action has been a bit on the mushy, slightly noisy, an inconsistent side. This is a brand new master for the past year.

BTW... 15k views and no sticky yet?

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simota1

at least the CSC is better.... thats the one thats a pain in the *** to change.... i hope the new master comes out sometime soon.... i already talked to joe about getting a kit....

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martin82

Miller Nissan took care of my car but now there is slight grinding sometimes up shifting into 2nd or 3rd that I never had

Clawesome

Hoping you guys can help me troubleshoot my clutch. Seems to be slightly different than some of the problems reported here, but not 100%. If this should be in a separate thread, let me know. 2009 z with 47k miles.

The top 50% of my clutch pedal has entirely no resistance to it, especially when I first start the car. After pushing the pedal down, it will come back up to the point where resistance begins, but not all the way back up. Pumping the pedal a few times seems to give more resistance to the pedal. I have bled the clutch about once a week recently, and each time I get a boatload of air from the line. After bleeding the clutch, it will improve significantly (almost back to 100%), but then will become steadily worse day-by-day, to the point of not being able to get it in gear after about a week (at which point i bleed the clutch again). I replaced the master cylinder about 2 months ago, but the problems persisted. The fluid resovoir is at the same level every time I check it, although I have seen some fluid under the transmission in my garage (this could be air replacing the leaking fluid, to maintain the level?)

It seems like most people who have had a slave cylinder failure report that their clutch pedal will actually stick to the floor when it goes bad, whereas mine will come back up about 30-50% of the way.

I brought it to the dealership (even though I am out of warranty), and they wanted to replace the slave cylinder, pressure plate, and flywheel at a cost of about $3000. My research has me thinking that it is simply the slave cylinder going bad (and sucking in air somewhere), and the dealership is trying to screw me. Any thoughts?

Jsolo

^^My bet is still on a failing CSC. It hasn't failed entirely in that it's able to build up some pressure, but after a while that bleeds down and you have to pump it up again.

I think your dealer's diagnosis is correct, albeit you can get it done at a better price. I'd go with the aftermarket zspeed csc which is metal, not plastic, and should last the remainder of the car's life.

To replace the CSC, the trans has to be dropped. The design on these cars is not like the older ones where the slave was externally mounted. If you're in there to do a CSC, then it makes sense to replace the rest of the clutch parts. Everything is open and right there.

Unless you've messed with the lines and have failure elsewhere, my guess is on the air entering through the failed csc seal.

In part, this was one of those things that prompted me to get the extended warranty. Nissan's powertrain coverage is a joke in context of MT's. The CSC is not a wear item, it's a part like a syncro or a gear that requires no maintenance, and should be covered. Yet it's not.

Good luck. Let us know how it turns out. Also, who ever does the work, make sure they save your old parts. It should be evident if the csc has indeed failed or not by the pics.

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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring

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MJB

I would buy an upgraded CSC from Joe@Zspeed. Also, there is a specific way to bleed the clutch system for our Z's, which can be a major pain to get all the air out. PM Joe and he will give you the details.

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