About a year ago, I had an auto repair shop replace my clutch. Since then, I have taken it in 3 or 4 times because air kept getting into the clutch system. The first time this happen, the clutch was no good after about 3 or 4 weeks. I took it back to the repair shop, they couldn’t find anything wrong and so they put fluid in, bled the system, and sent me on my way. I would go in every 3 or 4 weeks. The last time this happened, about 6 months ago, I took it to a different shop and they said the bleeder nut was lose. They bled it and it has worked fine until a couple of days ago.
This may be a clue: I used to live in an area of town were there was a steep hill that I would drive up and then down every once in a while. This was during the period that I would need to take the car back to the shop every few weeks. After I had the clutch was fixed the last time, I moved to a different part of town. Since that move, I have driven on flat roads. A couple of days ago, I took a drive up a steep hill. Later that day, my clutch got air in the system and I had to drive home without a clutch. It seems to me that driving on steep hills may be a clue as to what the problem might be.
Also, after the repair shop installed my new clutch, I got an exhaust link. This may not have anything to do with the clutch working properly, but why would I have an exhaust leak after a new clutch is installed?