Okay, now that we have a good pedal, try to bleed the system. However, air in the system shouldn't cause the system to lock up. So, lets try to narrow it down. First, pump the brakes so the calipers lock. Once they do, open the bleeder on the caliper and see if the caliper releases. If it does, then we need to go further back. Close the bleeder at the caliper. Go the master cylinder, and apply brakes so they lock again and open the front steel line on the master cylinder and see if it releases. If it does, then something is bad in the master cylinder.
One other thought. There is a fluid control valve on the MC that's primary function is to control rear brake pressure. Did you reinstall it? I attached a picture of it.
Let me know.
PS: You did clean and lube the caliper slid pins, correct?
Wednesday, March 10th, 2021 AT 11:21 AM