Ranger 2WD V6-177 2.9L (1989)
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 IN THE
OUTLET CASTING. TURN THE THERMOSTAT CLOCKWISE TO LOCK IT IN POSITION ON THE FLATS CAST INTO THE OUTLET
ELBOW.
It is imperative that the correct thermostat installation alignment be made to provide coolant flow to heater. 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. 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.
WARNING: DO NOT STAND IN LINE WITH OR NEAR RADIATOR FAN WHEN ENGINE IS RUNNING.
4. Fill the cooling system with the recommended Cooling System Fluid E2FZ-1 9549-A or equivalent and water mixture as outlined. Check for leaks
and proper coolant level after the engine has reached operating temperatures.
A coolant mixture of 50 percent coolant concentrate and 50 percent water is recommended to maintain best overall performance. To avoid damaging
the radiator, the coolant concentrate should not exceed 60 percent.
