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

KoolKarmaJoe · 07-13-2015, 07:50 PM

Quote:

Originally Posted by schellingr

Can a mechanically inclined person here explain in detail why the CSC fails and then goes back to normal?, then fails again (pedal to the floor) and comes back after a while? Sorry not a motorhead here.

My guess, and it is a GUESS, that it happens when fluid/clutch hydraulics get really hot. I'm leaning towards changing my clutch fluid twice a year to be on the safe side due to my spirited driving style & will only use GTR Hydraulic fluid.

jwick · 07-13-2015, 07:55 PM

Quote:

Originally Posted by KoolKarmaJoe

My guess, and it is a GUESS, that it happens when fluid/clutch hydraulics get really hot. I'm leaning towards changing my clutch fluid twice a year to be on the safe side due to my spirited driving style & will only use GTR Hydraulic fluid.

There's nothing special about the GTrR fluid. Use Motul rbf600 synthetic

http://www.racerpartswholesale.com/p...id/Brake_Fluid

eastwest2300 · 07-13-2015, 08:47 PM

Quote:

Originally Posted by jwick

There's nothing special about the GTrR fluid. Use Motul rbf600 synthetic

Brake Fluid - MOTUL RBF 600 Racing Brake Fluid

Thats what I'm using. RBF600

Anifaust · 07-14-2015, 12:52 AM

Best description- they insulated only the lower portion of the tubing that leads from the Master Cylinder to the Slave. This leaves the upper area of the line open to heat sink. Unfortunately there's still a good section of non-protected tube that runs straight past your exhaust lines. Overheated/Boiling fluid + plastic parts = lose.

I am still waiting on the CSC delivery from Zspeed since they were closed all last week. Just got the tracking email today (7/13) and it should be in OKC by 4:30 Wed. That makes it about two weeks downtime now since mine acted up on 7/2 just before the holiday weekend. My tranny locked down in second gear with the shifter in neutral due to my clutch being floor pinned. I haven't heard of anyone else having this issue and the mechanic said it was probably just a fluke combined with my pressure and timing of pulling the shifter into neutral with the jenk pedal.

I'm still having him wrap the exhaust line in thermal kevlar along with the new part replacement.

eastwest2300 · 07-14-2015, 07:55 AM

Quote:

Originally Posted by Anifaust

Best description- they insulated only the lower portion of the tubing that leads from the Master Cylinder to the Slave. This leaves the upper area of the line open to heat sink. Unfortunately there's still a good section of non-protected tube that runs straight past your exhaust lines. Overheated/Boiling fluid + plastic parts = lose.

I am still waiting on the CSC delivery from Zspeed since they were closed all last week. Just got the tracking email today (7/13) and it should be in OKC by 4:30 Wed. That makes it about two weeks downtime now since mine acted up on 7/2 just before the holiday weekend. My tranny locked down in second gear with the shifter in neutral due to my clutch being floor pinned. I haven't heard of anyone else having this issue and the mechanic said it was probably just a fluke combined with my pressure and timing of pulling the shifter into neutral with the jenk pedal.

I'm still having him wrap the exhaust line in thermal kevlar along with the new part replacement.

can you take pics of the wrap and the work you guys did, its something I might be interested in doing as well.. thanks man.

jwick · 07-14-2015, 08:42 AM

Quote:

Originally Posted by eastwest2300

can you take pics of the wrap and the work you guys did, its something I might be interested in doing as well.. thanks man.

I wrapped mine in Thermo-Tec heat sleeve. Good for 2k deg, I think.

The HFCs, since removed, are wrapped in header wrap.

If you are going header wrap DEI titanium is the only way to go!

eastwest2300 · 07-14-2015, 08:59 AM

Quote:

Originally Posted by jwick

I wrapped mine in Thermo-Tec heat sleeve. Good for 2k deg, I think.

The HFCs, since removed, are wrapped in header wrap.

If you are going header wrap DEI titanium is the only way to go!

Dude, you ARE the man, thank you so much.

Im gonna use my best friend google and find this stuff, thank you sooo much.

KoolKarmaJoe · 07-14-2015, 09:04 AM

Quote:

Originally Posted by jwick

There's nothing special about the GTrR fluid. Use Motul rbf600 synthetic

Brake Fluid - MOTUL RBF 600 Racing Brake Fluid

I agree, it was handy at time of fluid change. Still a better option than the average/no name brands of brake fluid sold at gas stations.

Uxi · 07-14-2015, 12:17 PM

Quote:

Originally Posted by KoolKarmaJoe

My guess, and it is a GUESS, that it happens when fluid/clutch hydraulics get really hot. I'm leaning towards changing my clutch fluid twice a year to be on the safe side due to my spirited driving style & will only use GTR Hydraulic fluid.

That doesn't seem to fit. It doesn't seem to matter how hard you drive it but pretty random. I was very mild with mine and only just out of warranty when it happened. I've been a little harder on it since break-in period ended, but really rather mild compared to how often I would redline my old Honda (since I don't want a reckless driving ticket

).

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07-14-2015, 12:52 AM	#4 (permalink)
Anifaust Base Member Join Date: Jan 2013 Location: OKC Posts: 17 Drives: '09 370Z Rep Power: 14	Best description- they insulated only the lower portion of the tubing that leads from the Master Cylinder to the Slave. This leaves the upper area of the line open to heat sink. Unfortunately there's still a good section of non-protected tube that runs straight past your exhaust lines. Overheated/Boiling fluid + plastic parts = lose. I am still waiting on the CSC delivery from Zspeed since they were closed all last week. Just got the tracking email today (7/13) and it should be in OKC by 4:30 Wed. That makes it about two weeks downtime now since mine acted up on 7/2 just before the holiday weekend. My tranny locked down in second gear with the shifter in neutral due to my clutch being floor pinned. I haven't heard of anyone else having this issue and the mechanic said it was probably just a fluke combined with my pressure and timing of pulling the shifter into neutral with the jenk pedal. I'm still having him wrap the exhaust line in thermal kevlar along with the new part replacement.