I recently replaced a frozen caliper and brake pads but can't get pressure back in the lines. we bled the brakes like 6 times but still dosen't get real firm when I press the brakes. could other calipers be froazen or os ot the brake booster?

 

Is your brake light on continuously? If it is: Look near the master cylinder/ ABS module area. There will be something called a pressure differential valve. Its usually thee next thing in line after the master. Its commonly (and erroneously) called a proportioning valve. Its function is to cut off fluid flow to one circuit of the brake system (front being one circuit, rear another) in the event of a sudden loss of pressure, such as a burst brake hose.

If thats the case, find and repair all leaks first. If a line looks suspicious, replace it. Now is a good time to check all the calipers for binding, then grease them anyway. Once youre certain all leaks are gone, turn your attention back to the differential pressure valve. There will be a small black cap on either end. Remove them and youll see what appears to be a large bleeder. Use a wrench to open the bleeder, I think its like 19mm or something like that. Remove the nut entirely, but carefully, as there are springs that come shooting out if your not ready. Remove the nut on the other end as well. Remove all the contents behine the nuts (springs, small piston) and then put it all back together. This should remove all brake fluid pressure to the vehicle. Now get your brake bleeder pump (buy one if you dont own one, as foot bleeding wont be effective), and start bleeding RR, LR, RF, LF. You want to bleed until you see new, clean fluid. It may take a few rounds until youre happy with the results. Dont forget to check the master after EVERY wheel. Once there is good fluid flow from every bleeder, then you can start foot bleeding for more pressure. Youre also going to have air in the ABS module as well. You will have to bleed that either by using the bleeder valves on it (if there are any) or by driving down a gravel road and slamming the brakes while turning to activate the ABS pump. The later method will force any air down into the brake lines, requiring another bleed at the wheels.

As a side note, when foot bleeding, dont go crazy with the pumping. Pump a few times to pressurize the system, the wait about 15 seconds before opening the bleeder. This will give the air some time to travel down the lines to the caliper.

Good luck to you. This process is a serious PITA. But it works. I just did it last week.

PS Make sure you dont hit the brake pedal when the brake system has an open line or bleeder. This may be what caused this in the first place.

 

Thanks sounds like the problem cause the brake light is on. nice too see community comming together. Aloha,Josh