Now this is a more common leak point on the 7.3L than just about all the rest. I have seen many throughout the years leaking very bad. If you haven't replace these yet with the updated parts I would keep a very close eye on them.

 

Forget about these fittings, replace with kit from CNC Fabrication. there kit replaces the qd fittings at the heads and in the HPOP. And you get new lines that will quiet the engine and provide better milage....