Ford Vehicle Manual page 197

Maintenance and Specifications
Fuel filter replacement—7.3L Power Stroke engine
The fuel filter/water separator is
located on the right side of the
engine. Replace the fuel filter/water
separator as recommended in the
general maintenance information
section, or sooner if it becomes
plugged. Vehicles operated on fuel
with more than average impurities
may require replacement of the fuel
filter more frequently. The filter has
a water drain valve built into the
bottom of the filter housing.
Removal
1. Remove the fuel filter cap by
turning counterclockwise. The fuel
filter element will come out with the
cap.
2. Remove and discard the bevel gasket. Carefully clean the mating
surfaces.
3. Press in on the fuel filter element locking tabs to separate the element
from the cap.
Installation
Note: The engine will not run properly if the fuel filter is not installed in
housing.
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