Ranger 4WD V6-171 2.8L (1983)
B5A-1 9554-A or equivalent. Position the gasket on the cylinder head opening. THE GASKET MUST BE POSITIONED ON THE
CYLINDER HEAD OR THE INTAKE MANIFOLD BEFORE THE THERMOSTAT IS INSTALLED.
TO PREVENT INCORRECT INSTALLATION OF THE THERMOSTAT, THE WATER OUTLET CASTING CONTAINS A LOCKING
RECESS INTO WHICH THE THERMOSTAT IS TURNED AND LOCKED. INSTALL THE THERMOSTAT WITH THE BRIDGE SECTION
(FIGS. 2 AND 3) IN THE OUTLET CASTING. TURN THE THERMOSTAT CLOCKWISE TO LOCK IT IN POSITION ON THE FLATS
CAST INTO THE OUTLET ELBOW.
FIG. 2 Engine Thermostat and Housing - Disassembled View
FIG. 3 Thermostat installation
It is imperative that the correct thermostat installation alignment be made to provide coolant flow to heater (Fig 2.). Insert and rotate thermostat
assembly to the left or right until it stops in the water outlet housing - then visually check for full width of heater outlet tube opening to be visible
within the thermostat port in assembly (Fig. 3). This port alignment at assembly is required to provide maximum coolant flow to the heater.
2. Position the coolant outlet elbow against the cylinder head, intake manifold or, water pump. Install and tighten the retaining bolts to specifications.
3. Connect heater hose to thermostat housing.
4. Fill the cooling system with the recommended Cooling System Fluid E2FZ-1954-A or equivalent, and water mixture as outlined. Check for leaks
and proper coolant level after the engine has reached operating temperatures.
