F 450 4WD Super Duty V10-6.8L VIN D (2004)
Thermostat: Service and Repair
Thermostat - 5.4L, 6.8L
Removal
1. Partially drain the cooling system.
2. Disconnect the upper radiator hose.
3. Remove the coolant outlet connection.
^
Remove the bolts.
^
Remove the coolant outlet connection.
4. Remove the (A) coolant thermostat and the (B) O-ring seal.
^
Discard the (B) O-ring seal.
Installation
NOTE: Thermostat must be installed as illustrated.
1. Use a new (A) O-ring seal to position the (B) coolant thermostat in the (C) upper intake manifold.
2. Install the coolant outlet connection.
1
Position the (A) coolant outlet connection on the (B) upper intake manifold.
2
Install the bolts.
3. Connect the upper radiator hose.
4. Fill the cooling system.
