I've done brake lines before, but not many, and not in a long time. I have one particular in-line coupling that I can't get to stop leaking. Other joints appear to be OK, though they could yet surprise me.
I've re-done this one several times. Currently, I have new line (with manufactured flare) going into the coupling. AFAICT, it's properly aligned - I could screw the nut in with my fingers. I started off with only moderate torque, and then tightened further as it kept leaking.
Any thoughts on this would be appreciated.
BTW: why does brake line come with two different nuts (long and short)?
Thanks, G