Big Brakes

[DanEC]

Originally Posted by pormgb

A funny thing; When I have the power bleeder attached and pumped up to about 15lb, the brake pedal does get quite hard, when the pressure from the bleeder is removes the pedal goes soft.

I'm thinking it's a MC issue. Have you looked closely at your pedal and linkage adjustment to make sure the pedal is returning the piston past the compensation port(s) in the cylinder? If the piston doesn't return past the port it can't refill with fluid and if the last press on the brake pedal moved the pads tighter against the rotors the system is short of fluid for the next application. If your linkage from the pedal to the MC is adjustable try shortening it a little.

[patrickt]

Dan might be right. Disconnect the rear lines from the splitter and plug them. Then bleed it again and if you can't get a firm feel with, essentially, a "front wheel brake system" only then it has to be hidden air bubbles or it's not assembled properly. That 1" MC is more than enough to handle the Sierras only. Whether it can handle the rears as well remains to be seen.