On my 2003 Excursion 7.3L, I notticed I'm leaking what I think is coolant from the passenger side rear hard line by the front spring hanger. I haven't pealed the plastic loom away yet, but I did see the loom is chaffed near the spring hanger. What lines are the ones that carry coolant, and can I just cut the hard lines and replace with a section of rubber hose?

 

Sure those aren't your rear AC lines and the leaking isn't just condensation?

 

Green coolant on the ground, here's the culprit;

 

If I remember correctly those line are no longer available. You will have to splice it or have some made. I am like 95% sure!!