Master cylinder reservoir bubbling after bleeding ?

[SolarGoldRaptor]

Hi guys, I've just finished replacing the leaky rear caliper on my 84 T/A HO. I've bled the rear brakes only to remove the air, not the fluid. They're working fine, they hold the rear wheels firmly, same for the e-brake (though I need to adjust the cable). But now when I push the pedal, it's spongy half way and then it's strong as it should. Also, I can see bubbles in the M.C rear reservoir. I was told I shouldn't have pushed the pedal all the way down when bleeding the brakes. Does that mean the M.C is toast ? Thanks, Bye

[50bmgshooter]

sounds like air in the master
did you let the reservoir empty? if so bleed the master then bleed the lines back out

[Stephen]

Sounds like whoever was pumping the brakes, might have lifted their foot a bit, before the bleeder was closed, & sucked air in.

Or worn threads somewhere/the bleeders themselves are bad, allowing air to get sucked in.

[SolarGoldRaptor]

Originally Posted by 50bmgshooter

sounds like air in the master
did you let the reservoir empty? if so bleed the master then bleed the lines back out

No, as I said, I bled only to remove the air in the system. I haven't replaced all the fluid.

[SDIF]

There is air in the line.

Bleed it again.

[LB9Iroc87]

when u bleed your brakes you suppose to make sure u got plenty of fluid in the front and rear resevoir and then keep doin the procedure until u get nuthin but fluid a couple of times.