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jazzmaster
jazzmaster, ASE Certified Tech
Category: Car
Satisfied Customers: 2951
Experience:  ase certified--32 yrs experience
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1979 Corvette, brakes failed suddenly, pedal to the floor.

Customer Question

Customer: 1979 Corvette, brakes failed suddenly, pedal to the floor. Replaced front calipers, rotors, lines, Master Cylinder and Power Booster. Bled brakes in order from Manual. great pressure until starting car, then pedal goes all the way to the floor just like it did before we replaced almost the entire system. The only thing not replaced is the brake line manifold. There are no visible leaks.
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Submitted: 1 year ago.
Category: Car
Customer: replied 1 year ago.
The car does stop, just slowly while the pedal goes to the floor. I did bench bled the new master cylinder.
Customer: replied 1 year ago.
FYI, I replaced front calipers when I found them leaking. rear calipers and pads look fine.
Expert:  jazzmaster replied 1 year ago.

hi, most likely the master was the part that failed in the first place along with the leaking calipers . the rear brake caliper may have sticking pins or bushings ,that will cause a low brake pedal situation that you have ..

sometimes you have to gravity bleed the brake system..

that is open the bleeder at each caliper -one at a time and let the fluid run a little bit then close the bleeder .

do this at each one and check the rear calipers to make sure they are moving freely ..

do it in the pattern of bleeding as per the manual ...jazzmaster ..

Expert:  jazzmaster replied 1 year ago.

Hi, I am just checking back .

If I helped please rate me positive and we can still continue if needed .

this is the only way I receive credit for the question ..thank you ...jazzmaster ...