F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Thermostat: Service and Repair
REMOVAL
1. Drain the radiator so that the coolant level is below the water thermostat.
2. Disconnect the bypass hose at the water pump and water hose connection.
3. Remove the bypass tube.
4. Remove the water hose connection attaching bolts.
5. Bend the upper radiator hose upward and remove the water thermostat and water hose connection gasket.
INSTALLATION
1. Clean the water outlet water hose connection gasket surfaces. Coat a new water hose connection gasket with Perfect Seal Sealing Compound
B5A-19554-A or D7AZ-19554-BA or equivalent meeting Ford specification ESR-M18P2-A or ESE-M4G115-A.
2. Position the water hose connection gasket on the intake manifold or cylinder head opening.
3. Install the water thermostat in the intake manifold opening with the copper pellet or element toward the engine and the thermostat flange
positioned in the recess. If the water thermostat is improperly installed, it will cause a retarded flow of coolant.
4. Position the water hose connection against the intake manifold and install attaching bolts. Tighten bolts to 16-24 Nm (12-18 ft. lbs.).
5. Install the water bypass line and tighten hose connections.
6. Fill the cooling system.
7. Operate the engine until normal operating temperature is reached, then check the coolant level and check for leaks.
WARNING: DO NOT STAND IN LINE WITH OR NEAR RADIATOR FAN BLADE WHEN ENGINE IS RUNNING.