Question : My
1991 BMW 320i manual runs beautifully as long as I do not have to shift
gears at low speeds or from stationary. When in first gear or reverse, the
clutch doesn't work momentarily. If I reverse during parking, the clutch
loses pressure. Then when I release the clutch, and push it back to the
floor, it is working.
On some occasions I have to stall the car
because it acts as if I slowed to a stop in gear
without depressing the clutch pedal. I have
checked the clutch/brake fluid and the level is
fine and there seem to be no leaks.
It appears you are losing fluid from either the
master or the slave cylinders. If the slave cylinder is
leaking, the outside of the casting would be wet
with fluid and the fluid level would always be
dropping and need to be topped up. Since you do
not have to, then we can rule out the slave cylinder.
There could be two types of leaks in the master
cylinder, internal or external. If the leak is past the
outer seal, then the firewall would be wet with fluid and you would need to top up occasionally.
Since this is not happening, you most likely have
an internal leak where the fluid is leaking back to
the reservoir and you can see no external leaks but
the system is not holding pressure. Pull out the
master cylinder and check it out.