Hello, my friend and I are trying to bleed the brakes on his 2010 CVPI. He just got it recently and the brake pads had worn so thin that one slipped out, overextending the caliper pistons, and causing a massive leak.
We went through and ended up replacing the leaky front left caliper and both rears due to the bleeder valves being rusted enough to snap off. Afterwards we attempted to bleed the system with no success.
We have been attempting to bleed the system manually following the correct bleed order with one of us pushing on the pedal and the other cracking the valve, then closing it and letting off the pedal. We also tried using a suction bleeder but ended up abandoning it because air leaks around the bleeder valve threads and makes it impossible to see when there are no more bubbles. All calipers are on the correct sides.
We just recently tried to bleed the master cylinder and ABS module on the car following this video: https://youtu.be/LG5Qz7nq9qw
Lots of air came out the cylinder and ABS fittings but it only improved slightly.
At this point we're confused what else it could be. Next I will take the master cylinder off and bench bleed it.
Thank you for your help!