stainless steel brake lines

[Big E]

I haven't had a problen with the ss fuel lines leaking but the ss brake lines leaked. I eventually gave up and bought the oem steel for brakes and haven't had an issue since.

[Enoch]

I have restored Many cars with Stainless lines and have no problem. The trouble with getting the lines to seal seams to be that the flare is not square on the end (where the flare on the line mates with the inverted flare on the mating surface) and occasionally I will lightly file the flare to square it up with the line. Then they seal with no trouble. Usually it onle takes a few passes with the file to accomplish this and I rarely have to do this. The other key is to use a Line wrench and put a wrench on the block it is being screwed into and you will stop 90% of the leaks. Another thing to think about is who you get your lines from, possibly the quality varies. I have used Fine lines and classic tubes with good results. I have put on hundreds of sets and never have had to switch. Hope this helps. Rich.

[SS427]

You can also put (just a DAB) of anti-seize compount on the brake line side (back) of the flare to help them seal. What this does is allow the flare nut to rotate on the flare without galling it. It does work, I just don't like the non OEM look.