Master cylinder question

[Chill59]

I've rebuilt my brake master cylinder with new seals.
I've bled the brakes and got a fairly decent solid pedal.
However, when you look into the master cylinder as the pedal is depressed the fluid squirts up a bit just behind the filler hole. Is this normal? or does it mean there is a problem with the master cylinder?
Cheers Chris

[philthehill]

A squirt is normal.

[Chill59]

A squirt is normal.

Phew!

So, as we've been pumping the brakes while bleeding, it's resulted in tiny bubbles on the surface of the fluid. (which, I guess, is a result of the little squirts of fluid?). Is this also normal? They soon disipate.

[philthehill]

The brake fluid will soon normalise with the small bubbles disappearing.