5rivers

Recently, I replaced the rear brake lines after noticing tonnes of rust and some leakage. I performed the bleeding process and all seemed okay - no leakage, brakes worked but still a little spongey/soft. Bled the brakes again after a few days. Trying to figure out why the brakes are still soft/spongey.
Replaced the master cylinder; bench bled the unit until all air bubbles were eliminated; noticed that the passenger side rear brake cylinder was seized, so I replaced that and bled the brakes again.
Removed the driver side brake cylinder and both ends seem to function better than the other side, but once I dismantled the cylinder I discovered there was no fluid inside the cylinder. I am guessing that there is supposed to be fluid inside the cylinder. When I bled the brakes, there is fluid in the brake line leading up to the cylinder. Figured I had dirty cylinder, so I removed the cylinder, cleaned it up and re-installed the piece. Still have little to no pressure on the brake pedal.
Is this brake cylinder bad as well? Appreciate any and all replies! Thanks

MAD_MIKE

I'd suggest replacing the wheel cylinder. They are wear items(consumables), if the seals are allowing air into the system then you will never get a solid pedal. They may not leak fluid but the seal may allow air in when the brake pedal is released.

tim73

Replace the old wheel cylinder, then get a good brake bleeder to help you bleed the brakes. Also, make sure all bleeder valves are on the top of the wheel cylinders...not on the bottom(Like if you swapped a left and right wheel cylinder).