Brake Fluid reservoir empty
 

Hello all,
I was flushing the brake system today and got carried away and emptied the fluid reservoir. I filled it up again and flushed all four corners while keeping the level up.

Is there any possible issue by emptying the reservoir and getting air into the master cylinder?? Or has the flush of the remaining three corners cleared any possible issues?

Thank you for ur time

As long as it brakes fine and the pedal doesn't feel squishy you should be fine. If there was an air bubble in there I would imagine the brake feel would be altered

If you've bled all four corners, then there shouldn't be any issues. It's just a system of a reservoir lines. Nothing high-tech about it.

I recall hearing something about "bench-bleeding" when the master cylinder gets emptied. Not sure if it's true or forum-talk. But brakes are fine for street use so far. Might re-bleed the corners again just to be safe. :ugh2:

You cannot gravity bleed if you let the master cylinder go dry... the only way to correctly bleed is by vaccuum.

If you used a venturi or mity-vac type bleeder, you'll be fine.

Gravity bleeding has been around for along time me and some guys I know still do it this way,I did a gravity bleed on my 370 when I replaced my SS line and flush the fluid with synthetic,the pedal was rock hard with the car off and stops great.

To the OP

If the M/C ran dry try to bleed the brakes to establish a pedal and it you can't then you can try pressure bleeding them if that doesn't work then the last resort is to remove the M/C and bench bleed it reinstall and re bleed the brakes.

Gravity works but not if the master is dry due to the abs system. No reason to bench bleed the MC. A vacuum bleeder on the calipers will run the fluid through everything.

I did this on my 40th after letting it run dry by accident (I use a pump connected to my compressor so I got distracted).

If the M/C runs dry vacuum bleeding them won't help at all,the M/C must be bench bled B/C of the angle it is at when it's on the car there for if you don't bench bleed it you will have a pocket of air in the very front of the M/C,that's why people bench bleed M/C before install.