Perhaps I should ask this question in it own thread, but is there a recommended method of making sure a metal brake line is debris free before hooking everything up?
The lines on my project are new...but have been sitting in some barn for thirty-odd years. I have already blown some compressed air through them. The line that would connect to the output of the master cylinder and head to the first brass connector block has been open to the air as the master cylinder was not present.
After blowing compressed air through, should I just go ahead and complete all the connections to the point closest to the wheel cylinders; then, one at a time, starting with the one closest to the master cylinder and plugging the others, pump some brake fluid into a clear glass container until I am convinced that most anything that might be in the line has been flushed out? Then, connect that line to its wheel cylinder and bleed it. Then move on to the line to the next closest wheel cylinder, etc. I would be assuming that with the other lines blocked at the ends, the fluid would be forced through only one branch of the tubing at a time.
Many of the lines are already connected to each other through the brass connector blocks. I am assuming that unless I see there is significant debris in a line, that it would probably be best not to open any of the connections that I don't need to.
Although the above description has too many words, I hope that it is understandable. I would rather waste some brake fluid than have something unpleasant happen when trying to stop in traffic!
Last edited by Nick in Manitou; 07/20/2026 5:34 AM. Reason: To correct grammar
