Originally Posted by Jsolo (Post 2179678)

^^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.

Originally Posted by ZForce (Post 2096314)

Same happened to mine, read my posts a few pages back. Have the clutch pedal assembly replaced..It probably failed first causing the master clutch assembly to fail. Check for the quacking sound when you press in the clutch pedal when you get the car back.

Originally Posted by DIGItonium (Post 2096490)

The sound of the plunger at the master?

Originally Posted by ZForce (Post 2096932)

The compressor shock that the helper spring is housed around, just behind the pedal. There is the normal sound, sorta of a whoosh, then the failed -blown seal sound like a quack sound.

Originally Posted by SkipinJupiter (Post 2226722)

Sitting at Nissan with a clutch problem.... Yesterday the pedal dropped to half way vs top, about freaked me out. I was about 20 miles from home. During the trip home, it alternated between full, top position and almost to the floor. Got home ok, no fluid loss at all... Wasn't a hot day or long trip (boil over), so kind of odd.
Made an appointment on-line for 7:15 this morning (mechanics get here at 8, jokes on me). Watching tv, everybody nice. Will update with results. 2010, 370z, 20,500 miles.

Originally Posted by SkipinJupiter (Post 2226784)

Update: Ok, service writer came over with this.... Checked out the system, no leaks and fluid quality look ok. They checked the service bulletins and found one on the problem... "We read the bulletin and this is how Nissan wants us to handle issues like yours when someone brings in a vehicle and reports your issues... We are going to flush/upgrade your fluid to GTR and hopefully this will fix the problem.
I'm almost ok with that to be fair because its acting normal today (naturally)... I might be back again but I can't expect them to start replacing stuff without evidence. No mention of any charge for the work/fluid/bleed.

Originally Posted by Joelito (Post 2237668)

Got my car back yesterday and as strokethis347 stated, there is a new bulletin regarding this issue. The same thing they told Jupiter pretty much was what they told me. They replaced the fluid with the gtr, they couldn't find any leaks and this seems to have fixed the issue at least for now. I'm still worried about this issue reoccurring and me getting stuck again. On the plus side they did cover my tow expense (i don't have road side assistance), and gave me a loaner for the 5 days they had my car.

Originally Posted by Fountainhead (Post 2237983)

Wow, took them 5 days to change the clutch fluid and bleed it?
That's got to be a record! /sarcasm

Seriously, what is the difference between the GTR fluid and the fluid in the Stock Z?