My '94 325 randomly drops the clutch pedal to the floor when I go to engage it -- press it with my foot.
All I do is touch the pedal and it almost gets sucked down and stays about an inch off of the floor. I can pull the pedal up with my toe, and then the clutch works fine again.
I've never experienced this behavior from a Master Cylinder, but that's where I think the problem is coming from.
The problem is very random and I can't find anything that causes the issue to occur. It just happens when it wants to, and the clutch works well the rest of the time. I can sit at a light with the pedal depressed and there is nothing to make me think that the MC is leaking fluid enough that the operation of the gear shifter is affected. (I always leave my car in N at a light, and select my gear when the light changes, so I do not stress the throw out bearing or the seals in the MC by holding the clutch depressed needlessly.)
Has anybody else ever had a clutch pedal simply fall to the floor when you go to use it?
I'm not considering mechanical failures, and I am stuck on fluid-related causes of the pedal behavior. If you can name a part that will give a random failure, I'd like to hear it.
If I can see straight, the clutch shares fluid with the brake system, is that correct? This would make me want to bleed the brakes after replacing the MC.