S0ULJAH

Replaced Master Cylinder & Slave Cylinder.
Replaced that spring within the pedal and reconditioned the unit.
Bleed the system. To the point where I cannot squeeze the clutch fork and the slave cylinder together anymore by hand externally; yes, there is pressure within the clutch pedal and I have adjusted the fork from the master cylinder to the maximum (it cannot unthread any further).
With that said, I feel like I bleed the system good enough because there was a sensation of the pedal returning back towards the other pedals but it just fell short from reaching the same level. Keep in mind that prior to the engine upgrade (R/R) the pedal worked fine; the half way up thing did happen to me once or twice but it went away, and didnt think much of it.
The clutch pedal unfortunately sags and I've used a lot of brake fluid bleeding the unit.
Did anyone experience bleeding the system taking waaay to long?
Or am I missing something?
Did I not bleed it enough?
I'm a certified technician and I've bleed a lot of brake systems and clutch systems. I've never experienced such a pain in the rear bumper than this issue. Is there a TSB?

rustyschopshop

would help if you gave us more details on which z you are working on. There are 2 different style hydraulic systems for the 350z.

terrasmak

iTrader: (8)

Compress the slave by hand with the bleed port open. It's the only way to get all the air out

S0ULJAH

2005 6- speed manual + vq35de
external slave cylinder

HR has the internal and not what I am referring to.

Thank you for pointing that out. My mistake.

S0ULJAH

UPDATE
Basically, my issue was nothing extremely complex; just air in the system.
I had to really feeness; the issue was that there was air within the master cylinder, microscopic bubbles that looked like milk if there is an abundance of it squirting out the clutch fluid through the slave cylinder
Nevertheless, the hydraulics are pushing the pedal to the same level as the other pedals. But, there a "thump" when the clutch pedal transitions from disengaging and engagement. Which means there is still air somewhere in the system present.
Then I saw this video:
If you skip through the blah blah blah. There is a good video example of small bubbles being present. Then there's an example of how the air gets trapped in the lines. Lastly, an interesting method he used to extract the air. I have those tools in my arsenal so I'm giving it a whirl.

350ZXLR

This video is pretty silly. The contamination in the fluid reservoir is a huge liability and anyone who doesn't recognize that particles will cause trouble in hydraulic valves probably shouldn't be working on brake systems. All of the air he "sucks out of his brake line" with the vacuum pump has to be from a bad seal at the coupling between the clear hose and the black fittings. There's no hose clamp, for example, and no brake system would work properly or be anywhere near drivable with that amount of air in it.

Air is 10,000 times more compressible than oil. Hydraulic fluid is stiffer than most oil (essentially incompressible). 1% air entrainment will reduce compressibility by 75% (source).

SnaykeByte

Agreed