Originally Posted by JStancampiano
I had the same problem when I installed the quick connects....They wouldn't seal no matter how long I let it dry or how clean it was. I resorted to using Yamabond as thread sealer and it has been fine for over 2 years and 30k miles.
Likely, as Mike said, you and the OP had deeper cracks than normal, which prevents sealing. Mine were pretty deep, and as you can see, not an issue.