At first, I was wondering why you would even mention the brake MC. As far as I could have assumed, it could ONLY be the clutch MC as the brake MC is not even close to the pedal area. Then I remembered my 164 is RHDFirst you'll have to determine what the "job" is, brake or clutch MC.
If the clutch MC is quite old, you are unfortunately going to have go through the full process of removing the clutch MC and replacing it.After some spirited driving in my 164S I noticed liquid on my left shoe when I exited the car. It smells and feels like hydraulic fluid, haven't crawled under dash yet but assume it is clutch master cylinder.
I was very fortunate Del, the previous owner did replace the IMS bearing, complete clutch assembly and tube seals. Both previous owners were long time PCA members.We like to think so, all around the world.
Has the bad bearing (don't remember which one) been replaced in the Boxster. Friend of mine has a 2000 Boxter S and he doesn't drive it much because he hasn't had the bearing replaced yet. I guess it is expensive to have done.
Mine is cloth braided, thanks for the advice on the knee pad.You do not have to remove fuse panel access door bolster so do not drill out the hinge rivets. You just lower it enough to be able to run long extension, 13mm socket and ratchet to reach nuts holding cylinder to pedal support.
I believe in removing the driver's seat to lay down to help to remove cotter key from clevis pin. Brake line flare nut crowsfoot on extension helps on rigid line but regular flare nut wrench will work.
Cloth braided rubber supply hose going to nylon elbow can be tricky. May not be cloth braided on later models. I have pooped out elbow after lower cylinder enough get working room.