[dsraven]

curious where the leak was found. if it was a fitting I would check why it was leaking. not tight? why? possibly a poor or cracked flare or a line that is not supported well near the rigid fitting so it vibrates and stress cracks. anyway, like said before, follow each line from front to rear to ensure the integrity of each is good. look for rusty spots, broken or missing retainer clamps etc
if you could post a few pics that would be great