Question: 65 brakes

[LUCKY13]

My 65 has power brakes with the m.c. rebuilt by the experts outside Wash. D.C. I installed four new calipers and new brakelines. I also installed a new power brake booster. The brakes are satisfactory but not great, pedal is still a little spongy. I've bled them numerous times and I don't see air during the bleeding. Would it help if I installed a 66 J56 proportioning valve?

 

[Bill Wilhelm]

Lucky13, No, a J-56 valve won't help. If your pedal is soft you have air in the system. What fluid are you using? DOT 3 or DOT 5? If DOT 5, the air will be MUCH harder to remove. In any case I would start by removing all four wheels and use a rubber hammer to beat on each caliper, this may dislodge the tiny bubbles giving you the problem. When this doesn't work, find/buy a pressure bleeder, use this in concert with the rubber hammer while bleeding. Have you checked roters for run-out? A rotor wobbling will pump air into your system. Good luck! Bill

 

[Kid_Again]

i absolutely agree since i have a '65 and the pedal is rock hard


did you bench bleed the master cylinder?

 

[ChuckG]

Did you bleed both the inner and outer halves of the rear calipers?

Many bleed just one and forget about the other.

Chuck

 

[22229stingray81]

I have nothing to add to this post, but I did want to say hi to a fellow Midlothian-er.

-Tatortot