On my 2013, I am doing front pads and rotors. I disconnected the 12v before starting. Now, I'm ready to compress the caliber pistons but wondering about what to do next. If I just compress the pistons. I will force dirty fluid back through the system which I've heard can mess up the actuator. If I open the bleed screw, air might get in and then require system bleeding, including Techstream which I dont currently have. Any suggestions are appreciated.
Indeed, yuck. I start by attaching some clear tubing to the bleed screw, looped upward (over a spring coil or something nearby) and then down. I start with some brake fluid in the clear tubing, so if anything flows inward when I crack the screw open, it will be brake fluid and not air. Generally, there isn't much inward flow. The piston is just sitting there, then you crack the bleeder open and start pushing the piston, which makes outward flow. Then close the bleeder again before removing the compression tool.
I would assume that if possible, it is best to have some pressure on the caliper as the bleed screw is cracked open. I like the idea of clear tubing with an upward loop.
