What would cause a 1997 7.3 diesel fuel leak in valley of motor?

1. Several possibilities come to mind, but the most common is the mechanical fuel pump leaking from the weep hole. Advance Auto sold me mine 9/08 for $99 (a Carter pump in a Bosch box w/ lifetime warranty).

2. The 1 1/4" banjo bolt on the head is suspect as well.

* Be sure to protect/save the crush washer*

3. Be sure to check the fuel drain valve of the right front corner of the bowl. The O-rings can go bad.

DO NOT USE REGULAR FUEL HOSE TO REPLACE THE 3 SHORT PIECES.

This photo is ALL BAD...

The correct blue one is silicone covered and in the bottom of the pic.

http://inlinethumb11.webshots.com/5962/2436871530100930408S600x600Q85.jpg

Go to Ford and buy the blue Aeroquip hoses. Be safe and invest the $$$.

Longer Blue hose, 1 required: F4TZ-9324-CA (KFL33)

Shorter Blue hoses, 2 required: F4TZ-9324-DA (KFL35)

They are oil and flame resistant. The new ultralow sulfur diesel (ULSD) degrades rubber faster. 3 pieces total, 2 are the same @ 2" and @ 2.875"

google search "Powerstroke lift pump replacement" and you'll find several How-to's.