bench bleeding clutch master required?

[Snou52]

Hi all,

I swapped out my clutch master and slave cylinder on my e30 and I can't seem to get all of the air out of the lines. I didn't bench bleed the master cylinder prior to installing it, is that required? that's the only thing I can think of, for it not bleeding.


thanks!
Snou

[MrBurgundy]

You don't have to, but it makes it way easier. Just get in the car and pump the clutch. Don't pump too fast, or aggressively, because you'll break down the air bubbles into really small ones, which will make it way harder to bleed.

[Das Delfin]

^ lol my experience was the opposite - you have to push the pedal down by hand fast and in quick succession and it will gradually build up pressure

[jeffnhiscars]

When we did my swap I was the lucky one to sit behind the wheel and pump the clutch for a good 20 minutes til we got some pedal. My left calf is still bigger than my right