F 450 2WD Super Duty V8-5.4L SOHC VIN L (2003)
31. Disconnect the eight fuel injector electrical connectors.
32. Disconnect the hose clamp and remove the heater water hose.
33. Remove the bolts, water thermostat housing, O-ring seal and the water thermostat.
^
Discard the O-ring seal.
