F 150 2WD Lightning V8-5.4L SOHC SC VIN 3 (2001)
Thermostat: Service and Repair
Removal
1. Partially drain the cooling system.
2. Disconnect the upper radiator hose.
3. Remove the water outlet connection.
1. Remove the bolts.
2. Remove the water outlet connection.
4. Remove the (A) water thermostat and the (B) O-ring seal.
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Discard the (B) O-ring seal.
Installation
1. Use a new (A) O-ring seal to position the (B) water thermostat in the (C) upper intake manifold.