Ford F150 Pickup. Instruction — part 1000

Fig. 23: Removing Water Thermostat - 4.2L
Courtesy of FORD MOTOR CO.

Installation

NOTE:

The water thermostat is indexed and must be installed correctly.

2003 Ford Pickup F150

2003 ENGINE Engine Cooling - F150 Pickup

Fig. 24: Installing Thermostat - 4.2L
Courtesy of FORD MOTOR CO.

1. Install the water thermostat.

z

Install the thermostat.

z

Install the water outlet adapter and the bolts.

2. Connect the upper radiator hose.

3. Fill the cooling system. For additional information, refer to COOLING SYSTEM DRAINING,

FILLING & BLEEDING .

THERMOSTAT - 4.6L & 5.4L

Removal

1. Partially drain the cooling system. For additional information, refer to COOLING SYSTEM

DRAINING, FILLING & BLEEDING .

2. Disconnect the upper radiator hose.

3. Remove the water outlet connection.

1. Remove the bolts.

2. Remove the water outlet connection.

2003 Ford Pickup F150

2003 ENGINE Engine Cooling - F150 Pickup

Fig. 25: Removing Water Outlet Connection - 4.6L & 5.4L
Courtesy of FORD MOTOR CO.

4. Remove the (A) water thermostat (8575) and the (B) O-ring seal.

z

Discard the (B) O-ring seal.

2003 Ford Pickup F150

2003 ENGINE Engine Cooling - F150 Pickup

Fig. 26: Removing Water Thermostat & O-Ring Seal - 4.6L & 5.4L
Courtesy of FORD MOTOR CO.

Installation

1. Use a new (A) O-ring seal to position the (B) water thermostat in the (C) upper intake manifold (9424).

2003 Ford Pickup F150

2003 ENGINE Engine Cooling - F150 Pickup