rihwoods

When first driving after cold start,brakes go halfway to floor,but get firm on next push on pedal...this re-occurs until vette is fully warmed up,then all is normal....
Plan to install all new brake hoses,bleed good,and go from there...any thoughts on this ?? No leaks or foaming in master cylinder..78 SA..

big_G

It sounds like the master cylinder to me....

rihwoods

Thanks..I'll put a new one on with new hoses,too......think the master cylinder is original..can't remember ever changing it...
Rich

427V8

sounds like the seals are getting stiff

rihwoods

Makes sense...and shrunk letting fluid bypass seals....Thanks...