I'm just finishing up a clutch job and the clutch pedal now sticks on the floor. During the install process I pushed the clutch pedal down with it being unattached to the tranny. I checked the clutch reservoir and it was empty. I don't where it went? It may have drained out and contributed to the oil from the tranny on the ground but don't see a leak. I tried bleeding the system and can build some pressure but the pedal won't come back up. The lines look good and seemed to be fine prior be me being stupid. I think I need the lower piston piece? Perhaps I blew a seal in it?

 

Check all of the lines, check if the slave cylinder is seated properly on the fork. There are 2 spots where u need to bleed, the spot on the strut tower, and the slave. Not sure why Nissan made to spots to bleed, it just makes is twice as hard...

 

no....your fine, i dont think you bled it enough. when you detached the tranny, you obvoiusly removed that black hose that goes into the slave cylinder. all the pressure with the fluid leaked out. what you need to do is have someone press the clutch pedal after the install, and then open the bleeder valve. you can probably use the bleeder on the top only. YOU MUST MAKE SURE FLUID DONEST GO BELOW THE MINIMUM MARK...otehwrise air will get sucked in again.

have someone hold the clutch pedal down, open the bleeder screw, and fluid should gush out due to the air trapped inside. youll need to do it like 15-20 times i think to build up pressure.

if you dont have two people, what i did was i took my icescraper/windshield brush and wedged it between the clutch pedal and pushed the power seat up so that it would press on the pedal. then open the bleeder, then close it again. saved me from having to call antoher person to bleed the clutch.

the reasoning behind this is simple; air is compressible and when you press that pedal, instead of the pedal pressure being converted to hydraulic pressure, the air compresses and the clutch never engages.

 

Nope I put a zip tie over then end of the slave cylinder piston then zip tied it out of the way. When I engaged the clutch (not hooked up) it came off of the zip tie that was going over then end of the piston.

I was careful to not disconnect the hydrolic system because I didn't want to have to bleed it.

 

I should add that my wife was inside the car helping be bleed the system. I hit both nipples (oot oot) I'd guess 10 times while keeping fluid in the system.

 

How many times did you open/close bleed valve? according to motoratve (I know I spelled it wrong) his slave cylinder was bone dry and he filled and bleed in 7-10 open/closes.

I dont know but add me to the list of more bleeding maybe needed.

 

usually what happens is an air bubble gets stuck in the huge "T" section of pipe where the first bleeder screw is.

gravity bleed the system until you have fluid coming out of the bleeder at the slave.
Then go back and use the bleeder screw in the middle of the system until you've opened/drained at least 8-10 times. there's a LOT of tubing curled up under the car. don't know why nissan did that. freaking stupid, IMO. (I just bypassed all that crap on my car. makes bleeding the system 500 x easier).

once you've bled the one in the middle, then go back and bleed the slave cyl a couple more times and you should be done.

 

Here's a quickie MS paint drawing... you can see a little better how the thing is designed this way...

The blue tube is the big curly crap under the car.. it just tees off the other line and the fluid doesn't actually pump anywhere.. it's just there to absorb vibrations basically (and possibly heat)..
But what happens is an air bubble gets stuck in it like the pic shown below, and no amount of bleeding the system at the slave cyl get rid of the bubble. it will sit there for days, and you'll never build pedal pressure.