Last week driving my 86 2.8 5 speed, the clutch pedal went to the floor, and I was stuck in 2 cnd gear. Thankfully, made it home to the garage without incident. I assumed the line between the master and the slave had blown, and I was correct; a leak right where the line curves around the floor drivers side, about two feet from the master. I put in a line repair, and then tried to gravity bleed the clutch system. Nothing is getting through to the slave. So I undid the repair to check if it was blocked anywhere, and it is not. However with the master reservoir full, no fluid exits where the line is broken, even when I pump the pedal. The master cylinder is a new replacement less than 200 miles ago on the car. Everything looks normal, but the master is not doing what it is supposed to do. When I first cut the line, hydraulic fluid did come out of the line where it is severed. So????
I would try and remove the line at the Cylinder and see if you can pump any fluid out without any lines. If not sorry but your cylinder is shot already. If it does then you have your answer that you might need to replace more line.
The piston in the master cylinder... is it stuck in deep into the bore and the clutch pedal is only returning to position because of a spring (that is supposed to be removed)?
A lot of the posts on this topic seem to have disappeared. Just to clarify, after much difference on opinions, I removed the master, bench bled it, and then reinstalled. Elevated the drivers front, and gravity bled the line to the slave. Got all the air out, and let it sit overnight. #&*¥€ in the morning the damn master reservoir was empty, with all the fluid under the car where I had put the piece of replacement clutch line in. I had to reopen the leaking compression fitting, and based on internet advice, put a couple of drops of motor oil on the fitting threads, and retightened. This seemed to stop the leak. Had to bleed the master again in order to get the gravity bleeding to flow. I am done for today, but did notice air getting into the system at the slave bleeder valve, unless it is almost completely closed. Put some Teflon tape on the bleeder threads. Will final update on all this tomorrow. ( hopefully)
