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ghia1974@comcast.net 06-28-2019 02:15 PM

Losing brake pressure
 
I have a 69 with manual disc brakes and for some reason I am unable to get the system to hold brake pressure. I have replaced the 4 calipers and master cylinder and bench bled the master cylinder and gravity bled the brakes. I started off with the pedal being hard and high but over a short period of time (30 minutes driving or so) the brakes are almost to the floor. This is the exact problem I had before replacing the brake components. When I checked the fluid in the master cylinder its right at the top, zero leakage. Any suggestions?.

muffman58 07-22-2019 07:40 PM

It sounds like you have a bad master cylinder since your not losing fluid. I have had brand new ones do the same thing.

73shark 07-23-2019 08:14 AM

ghia, welcome to the forum.i agree.


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