I had a leaky slave so bought a new one from autozone as there brand is actually metal not plastic. I got the old one off and new on on within minutes so not like that much air could have gotten in. I also filled the new slave AND THEN compressed it fully with hose clamps and attached the stock line and allowed the plunger to slowly back out and then installed it and attempted to bleed it FOR TWO FRICKEN HOURS !!!! strange thing is every time I crack the bleeder I hear it suck in air, I tried attaching a hose and looping it so it would retain fluid NO LUCK .
so then I'm read let it sit over night pedal compressed but NO WHERE does it state if bleeder should be left open or closed . I'd assume open so I have it open, hose on and pedal compressed and reservoir full..
what am I doing wrong , could the autozone slave be **** out the box???? I'm so frustrated, wtf am I doing wrong? I literally got noooooooo pedal feel AT ALL

 

Mini slave cylinders are notoriously difficult to bleed, while it's been said to have been done without; a Power Bleeder is basically a must.

Best suggestion is to remove it from the bracket and re-compress it, then bleed it with a Power Bleeder while not yet installed, keeping the Slave at such an angle that the line and bleeder are as high as possible. Get as much air out as you can like this, then re-install it on the car, and bleed again from there.

Even this way make take a few tries after re-install.
Don't forget to have plenty of fluid on hand to not let the reservoir get too low.

These are pretty much the best instructions around:

 

Yes. That video is far more informative but again though missed a few things . Wgen he hooks up the power bleeder and bleeds it , does the pedal in the car just stay in the upward position because the power bleeder will then take the place of the depressed clutch pedal ? ¹
I hope my slave isn't bad from the box though I feel like it is pulling in air every time the bleeder is cracked open , maybe the power bleeder will prevent that.
also while it sits over night with pedal depressed , is the bleeder sapose to be left open while doing so or do I only leave open the reservoir during that time ????

 

You will need a 2nd person for this. One person in car, one under and the slave. Open the slave then have the other person push the pedal to the floor, close slave then have them pull up as slow as they can. Do this 10 times, making sure you keep the brake fluid full. Eventually you should start to get your pedal back, mine came back around the 6th time. If you still feel like you don’t have it, keep doing it. Then once you feel like you have it, with slave closed and fluid full press and hold clutch to floor for 8 hours or more. When I pulled the stick out in the morning my clutch was still on floor, so I pulled it up as slow as possible and it has been great ever since. I’ll try to dig up the thread that helped me.

 

https://new.minimania.com/Clutch_Slave_Cylinder_Bleeding_the_Right_Way

https://www.northamericanmotoring.com/forums/drivetrain-cooper-s/74514-bleeding-clutch-slave-cylinder-need-help.html

hope these help

 

that's what I tried , for 2 hours and 2x containers of brake fluid later I had 0 pedal pressure..I'm willing to bet autozone sold me a **** part because I can't imagine I'm doing this wrong. I'm gonna remove it and compress the plunger again and reinstall ..I let it sit over night compressed n stuff so I'm hoping that's gonna do it..

 

Correct, you leave the pedal alone and the power bleeder does all the work.
And yes, the power bleeder prevents the vacuum effect you're talking about by putting constant pressure on the fluid, lines and reservoir.

For whatever reason, Mini's are very difficult to use the OG two person depress the pedal method.

 

DO I LEAVE THE BLEEDER SCREW OPEN WHILE PEDAL IS DEPRESSED??????? I Found the autozone one was leaking back into the boot so I got a new 1 exactly like oh yem and I've been bleeding it for 2 hours and I have barely any pedal pressure in sometimes it drops to the floor sometimes it doesn't and 0 air is coming out As I have a clear hose connected and can see I've cycled through like 3 qt of fluid now

 

Valve open push pedal to floor, close valve and pull up slow. Valve only open when you are pushing the pedal to the floor. On your 2x4 you need the piston pushed all the way in. I haven’t used that method. My slave was in the car and when bleeding brakes I thought why not the slave. Well that led me to where you are. If I would have had the clutch pressed to the floor it would have been fine since the piston would have been in.

 

Bro no offense but you're stating the obvious that I obviously they obviously tried I'm asking questions for specific things if you can't answer the question please don't provide advice that poses nothing to me Telling you I've tried almost everything I need to know how to let it sit overnight once again I just tried bleeding it for another 2 hours and 2 qt of fluid for nothing it is not bleeding I'm not even getting air out either and I have barely any clutch it only engages about a quarter of the way down that's it so how do I let it sit overnight do I have the bleeder open and pedal compressed and top of my reservoir open or do I have the bleeder closed in my reservoir open while pedal compressed someone please answer that

 

Dude I’m seriously trying to help. Overnight, bleeder closed, fluid full and lid on, pedal to floor. The goal is to get the air to work it’s way up through the system. That’s what I did. When I bled mine with power bleeder everything was good till the poof of air that came through the system. I closed it up pumped back up to 15 lbs and opened the valve. Solid stream of clear fluid so I thought I was good. Get in it boom pedal to floor. I seriously sat on it for a week and read everything I could and did what I said in my first post and she was back.

 

Just went through this. What helped me the most was this: slave off car and compressed. Remove bleeder and fill the slave with fluid. Keeping angle correct for air to escape and keep tapping the body with whatever. I used a screwdriver handle. But as you tap, air bubbles will come out. Keep filling and tapping till they stop then put the line on and do a quick power bleed. Worked like a champ first try. **** ALSO the autozone slave I bought never bled right and blew out in 3 days. Buy the OEM.

 

ok..I have it set so ilke check it tomorrow morning but I have no faith , I'm scared my master got air in it somehow from that damn junk one I 1st got..may have happened from all the bleeding attempts with it having a bad seal.. sob
actually one on my car must have been a replacement because it's the same design and brand as one I have now..I wonder if the 1st one autozone have me was the oem one , are oem plastic or metal ? And what brand are oem ? Mines fte I believe????

 

I’ve done 3 slave replacements in the past year. All three sucked. The first one took me two days. Last one was 30 minutes. This is my routine and it worked for me

1. Compress the slave and keep it in the retracted position.
2. Bench bleed the slave and keep it with line end facing up.
3. Install line and power bleed at 10-15psi.
4. Install slave without letting the pusher to extend fully. I put pusher on clutch arm and then put slave into mount.
5. Foot bleed about half dozen times. Push on cluch. Open bleeder and close.
6. Using a stick keep clutch pushed to floor over night.

Next morning the clutch works 90% and slowly gets to 100% over the next few trips.

Hope this helps.

 

Ok though guys.. stop telling me power bleed. THATS NOT AN OPTION FOR ME and befor I order a 50$ bleeder and wait a week for it to arrive I'd be better off just taking my car in.. my luck I'd waste my money and time waiting on bleeder only to find its my master that has air in it..so if I can't get this manually done today IN IT GOES and there goes getting my proxies I was going to be buying...

 

ok. Bye. I won’t try to help anymore!

 

I converted a bug sprayer. Worked ok for a one time job. Can post pics later if needed.

 

Seems to me you tried everything except wedging the pedal to the floor overnight, yeah? Instead of telling everyone they are morons, why not give it a try?

 

never insulted anyone and if you read rather than just try and be jonny know-it-all you'd see i attempted that TWICE now but thank GOD the second time, last night it worked.. I have full pedal pressure now FINALLY.
i guess trick was A have a known good part to use and B once it's put on correctly by Said steps, chances are you WONT get full pressure bleeding and it NEEDS to sit over night compressed BUT only do that once you get it to where you can feel soooooome clutch engagement which happens like 3/4 way down but at that point, without a bleeder that's as good as its going to get and then needs to sit compressed over night...
thx guys and to those who also pmD me , I do appreciate it..
But lol don't say I should have used a pressure bleeder , I know but it at the time wasn't an option...

 

I just reread all your posts here, and your communication style is not the easiest to follow... I saw that you said you might have tried it, but you weren't sure if the bleeder should be open or closed. I understood that to mean it wasn't accomplished as directed. And the second time, was last night, before you started miscommunicating again about members telling you what to do. So, yeah, no really clear on what you were actually doing.

Glad it worked out for you, though.

 

thank you.. sorry about that , I was using speech to text above in a few posts. Lol was so frustrated I didn't want to text.. but yes,, it feels great.. feels better than my other cooper does now even..