How to fit a clutch master cylinder on a mini

Not if the resoviors are separate, I have come across a brake master cylinder with a tube up the center to feed the clutch master cylinder.

the clutch fluid reservoir is at the clutch master cylinder or is an extension of the brake master cylinder
look for a hose from the clutch master cylinder to the brake master cylinder reservoir

brake fluid goes in the reservoir on top of the clutch master cylinder. If there is no reservoir check for a line to the brake master cylinder reservoir as some cars use the brake master cylinder reservoir as a common unit . Check that that reservoir is full. Bleed out the slave cylinder to remove air in the system.

Check the fluid-reservoir for your clutch. If there is low/no fluid, top it up. Pump the pedal a few times first .. and check underneath the car for a fluid leak.

If the fluid reservoir is full, don't bother checking under the car for leaks.

Usually, the clutch master cylinder has a 'nipple' - a bleed point. Get someone to pump the clutch pedal for you a few times and keep it pressed down. Place a rag on the nipple and slightly undo the nut. Any air in the system should be forced out. You may have to open/close the nipple (nut) 2 or 3 times whilst somebody pumps and holds down the clutch pedal.

If there is no nipple/nut on the clutch master cylinder, follow the metal tube back up into the engine compartment and bleed the air out of it by putting a cloth around the topmost point where it connects to something else, and slightly undo the connection. The clutch pedal should be pressed down whilst you do this ..

If there's no air forced out of the hydraulic line or the clutch still does not build pressure, it may well be that the rubber ring inside clutch master cylinder is perished. You either have to fit a new rubber ring or replace the clutch master cylinder.

Replacing the clutch master cylinder is the best option. The bore of the master cylinder can wear - become 'ovalled' over time. Fitting a new rubber ring into a master cylinder that has a worn bore is only a short-term cure.

A perished rubber ring or worn clutch cylinder bore simply allows hydraulic fluid to be 'moved' without becoming pressurised

It's leaking on the driver's side? That would be the master cylinder bolted onto the firewall. You will have to replace with a new or remanufactured clutch master cylinder. When the seals go out, the whole unit must be rebuilt. The store will give you a discount if you bring in your old one for exchange.
The clutch slave cylinder will be down on the transmission bell housing. Follow the small steel line from the master cylinder. It goes right to the slave cylinder.
Pretty easy to change out the master cylinder. Remove the steel line, unbolt unit from the firewall, then under the dash, there's a rod from the clutch pedal to the master cylinder. Just undo the retaining clip or pin holding the rod to the pedal. When the new unit is installed and filled with fluid, then you get to learn how to bleed the hydraulic clutch at the slave cylinder-the fun never stops.

remove line from the side of clutch master cylinder two bolts or nuts on firewall inside vehicle is a pin on the upper side of clutch remove and pull old unit out bench bleed new master by filling and pressing in on the piston of the master cylinder. if you dont have a hose fitting dont bench bleed bleed it in vehicle( this method takes longer) install back in vehicle and hook it all back up torque bolts to 25 ft lbs then bleed the slve cylinder from under vehicle near back of motor just like bleeding brakes pump up hold and release the line pressure by opening valve on slave cylinder.

you have an air bubble in the system.. keep bleeding it and it should return. if the clutch master cylinder is like a ford then you actually have to remove it to get the air out by holding the master at the right angel for the air to be completely removed....

YOU NEED A HAYNES MANUAL BECAUSE IT WILL SHOW AND TELL YOU HOW TO REMOVE CLUTCH MASTER CYLINDER.TO REMOVE CLUTCH MASTER CYLINDER YOU HAVE TO GO INSIDE THE VECHICLE AND REMOVE THE LEFT SIDE UNDER THE DASH PANEL.YOU HAVE TO UNCLIP AND SLIDE OUT PIN SECURING THE CLUTCH MASTER CYLINDER TO THE CLUTCH PEDAL.AND YOU WILL HAVE TO UNSCREW THE MOUNTING BOLTS AND DETACH THE MASTER CYLINDER FROM THE FIRE WALL.YOU WILL NEED HAYNES MANUAL.YOU HAVE TO REMOVE OTHER THINGS BEFORE DOING THE JOB.YOU NEED FLARE OR INLINE WRENCH ALSO.

crawl up under the dashboard & look where the clutch pedal rod goes through the firewall. look for traces of brake fluid at the rubber boot of the rod. a clutch master cylinder normally will leak to the inside of the vehicle & down the firewall when it fails. Replace as required & bleed clutch system using the bleeder valve that should be on the slave asy.

sounds like your clutch plate is sticking, i recommend fitting a new clutch kit, while doing this remember to machine the flywheel or you will still have same problem. if this does not work it might be your clutch cable, replace cale first (cheaper option 1st) then replace the clutch kit.