I was able to draw all fluid using the vacuuming method, but it was not as easy as I had anticipated. This is my first time trying this method, so it may in part be due to a learning curve? The first step should always be to suction all old fluid out of the reservoir and replenish with fresh fluid. As long as you don't press the brake pedal, you can remove as much as possible with no concerns over air working its way into the system. For the procedure at the calipers, I believe in all cases some air will work its way into suctioning hose due to a loose bleeder screw, or due to the adapter (no matter which adapter you use). This air leak is no big deal from the standpoint of air working its way into the system since it is simply at the connection point, however, due to the leak I had to continuously actuate the pump to sustain the vacuum. Once you finish suctioning fluid out and have removed the adapter, you should wait for some fluid to drip out of the bleeder screw before tightening it this is to make sure no air work works its way into the system. So in my case, the tool does work as intended. It helps to watch YouTube videos on how to use this tool for brake fluid change jobs (the Car Care Nut has a good one). Obviously, it really seems like the best vacuuming process is using compressed air and getting the MV6835 ($183) kit instead; but for this you'll need a compressor rated at least 4.3 cfm 90 psi. If you have a compressor that meets this specification, I would recommend this method instead.
Rating:
[4 of 5 Stars!]