Changed Slave Cylinder, Now Cant Get Lines To Bleed

WankelsRevenge · 09-30-2013, 05:20 PM

So about a week ago I was driving when suddenly when I went to change gears my clutch pedal wouldnt pop back up. After a discussion with a mechanic friend of mine he advised me it was probably the slave cylinder that went bad. Fast forward a couple days and I got my new slave installed, along with a new SS hose from Corksport.

Now to my current problem. Im trying to bleed my clutch lines. I have the resivour full, and am getting fluid to the slave as fluid will come out of the bleeder valve if I open it up. My problem is I cant build any pressure in the lines/pedal. When I push the pedal down it still just drops and wont return on its own. Ive pumped the pedal manually lifting it back up by hand about 400 times (I know because I actually counted) and still no pedal stiffness, no self return. I dont think my master cylinder is bad because Im not getting any leaks anywhere. Also I know the two person process of bleeding a hydrolic system, as Ive done brakes a few dozen time, just my problem is I cant get any pressure in the lines at all. I have a link to a video I made kind of showing the problem as well. If anyone can help me out Im in pretty dire need here.

Link to video...
https://www.facebook.com/photo.php?v=10201246650027331

Rotary Evolution · 09-30-2013, 05:38 PM

uhhhh, you're friend who is a "mechanic" just randomly threw out that it needs a slave? your friend isn't much of a mechanic...

was the slave cylinder leaking? if not, then it probably wasn't your problem, because a slave cylinder is a simple plunger and it has 2 failure modes, seized(which would still give pedal pressure) and leaking externally(which it would still work but it would cause the pedal to fall and empty out the reservoir in no time).

your problem was likely a faulty MASTER cylinder, because when the master cylinder fails it usually bypasses the fluid internally back to the reservoir. when it fails in that manner then you won't have any pressure working in the system, hence why you can't bleed it.

there's nothing worse than techs who can't actually diagnose a problem but simply throw parts at a car until they get lucky. ALWAYS check for leaks first, if nothing jumps out at you then it is probably your masters.

RETed · 09-30-2013, 05:50 PM

Also, double check and see if the pin shoots out of the clutch slave cylinder...

Sometimes the clutch fork either pops off the pivot ball, pivot ball breaks, or clutch fork breaks.

-Ted

chibikougan · 09-30-2013, 08:02 PM

Hey I might have a new master I would sell for super cheap.

09-30-2013, 05:38 PM	#2
Rotary Evolution rotaryevolution.net Join Date: Feb 2011 Location: Las Vegas, NV iTrader: (0) Posts: 248 Rep Power: 14	uhhhh, you're friend who is a "mechanic" just randomly threw out that it needs a slave? your friend isn't much of a mechanic... was the slave cylinder leaking? if not, then it probably wasn't your problem, because a slave cylinder is a simple plunger and it has 2 failure modes, seized(which would still give pedal pressure) and leaking externally(which it would still work but it would cause the pedal to fall and empty out the reservoir in no time). your problem was likely a faulty MASTER cylinder, because when the master cylinder fails it usually bypasses the fluid internally back to the reservoir. when it fails in that manner then you won't have any pressure working in the system, hence why you can't bleed it. there's nothing worse than techs who can't actually diagnose a problem but simply throw parts at a car until they get lucky. ALWAYS check for leaks first, if nothing jumps out at you then it is probably your masters. __________________ http://rotaryevolution.net Last edited by Rotary Evolution; 09-30-2013 at 05:43 PM..