My clutch pedal is stuck to the floor. It can be returned to the normal released position by pulling it up. The pedal isn't floppy or anything, it actually seems to snap to the floor after a certain point. I checked the clutch fluid last week and it was fine. But now the reservoir is 100% empty. Are these the symptoms of a bad slave and/or master cylinder?

Car is a 2003.5

 

You need to replace the slave for sure...and when you put new fluid in it, make sure its DOT4. Might as well replace the master also and add a stainless steel clutch line while youre at it.

 

Ok, thanks for the tips.

 

No problem homie....heres the breakdown...

Master

http://orderinfinitiparts.com/parts/...TER%20CYLINDER

Slave

http://orderinfinitiparts.com/parts/...AVE%20CYLINDER

SS Clutch Line

http://www.z1motorsports.com/350_g35...oducts_id=2206

 

This def sounds like an issue with the hydraulics rather than friction parts?

 

Affirmative. If you are confident in your driving ability, your clutch and flywheel are most likely still good.

Nissan hydraulics have always been kinda shitty, and the earlier years had some defects and design flaws.

The newer model years (06+) had revised parts and clutch feel and smoothness is dramatically improved.

As soon as you replace these parts and add DOT4 fluid, your car will shift better than brand new.

 

This is a fairly common problem, pretty sure there's a whole thread dedicated to this https://g35driver.com/forums/drivetr...come-here.html

The simple fix is to bleed the clutch fluid at the slave cylinder so you have fresh fluid through-out the lines. The clutch line runs near the exhaust on that side, so the fluid breaks down easier.

 

Thanks for the help guys. It looks like something has broken rather than what's discussed in that thread. I added fluid and it just added to the puddle underneath the car lol.

 

The clutch line link posted above could be the culprit area. If the leakage can only be seen under the car then that's the line that needs to be upgraded. I didn't change mine when I swapped clutch master cylinders and i was still having mush pedal issues. because the OEM line could not handle the pressure. Swapped a steel braided line and it's been good ever since.

Good luck

 

Dig deeper into that thread (last few pages), it goes on to discuss bleeding the fluid as a fix. Ignore the part about siphoning out the reservoir only, it needs to be bled from the bleeder screw on the slave cylinder. I do this every spring now because my pedal sticks to the floor on a hot day, bleeding fixes it every time. It's cheap and easy preventative maint at this point. I'll probably replace master & slave cylinders whenever my clutch needs to be replaced and do it all once.

 

Fluid wear is a problem a lot of people have and don't realize it. Most people don't know that you should REPLACE the brake and clutch fluid once a year. Yes, it goes bad just like any other fluid in your car. It's very simple to just do the clutch when you do the brake fluid.