avicenna110
SILVER Star
My grandfather had a brake shop and I wish I helped out more. I’m having issues bleeding my ‘65 with drums all around. I exchanged the master cylinder, the wheel cylinders, and shoes. I got all the air out, and adjusted the brakes and test drove the car a bit, it was fine but not great. I noticed the pedal was much higher than 9.6 inch per FSM. So I adjusted the pedal to the right height. The brakes became spongy, I thought probably because the rod isn’t pushing as far. But also I noticed there was a lot of bubble in the master cylinder when I pushed the pedal. Happens almost every time, not tiny bubbles but big ones. Sometimes the pedal gets hard after pressing, but then get spongy again. I tried bleeding the brake lines again for over an hour with my wife and there is no air in the lines. I know I’m supposed to bench bleed the master, which I skipped hoping I would eventually get all the air out, but let’s say there is air in the master, is it normal for the master cylinder to bubble so much when I’m not bleeding? It’s as if air is getting in from somewhere but I have checked everywhere and there is no leak. Help a guy make his grandpa proud