Thermostat Removal & Installation 1. Disconnect the negative battery cable. 2. Drain and recycle the engine coolant. 3. Remove the Power Steering reservoir support bracket. 4. Remove the upper radiator hose at the thermostat housing. 5. Remove 2 thermostat housing retaining bolts and remove the housing. 6. Remove the thermostat and O-ring from the lower intake manifold. Discard the O-ring. To Install: 7. Clean the O-ring sealing surfaces. 8. Install a new O-ring, on the thermostat and position the thermostat in the lower intake manifold. 9. Place the thermostat housing on the lower intake manifold and install 2 retaining bolts. Tighten the bolts to 15-22 ft. lbs. (20-30 Nm). 10. Install the power steering reservoir support bracket. 11. Fill the engine cooling system. 12. Connect the negative battery cable. 13. Start the engine and allow it to reach normal operating temperature while checking for coolant leaks. 14. Road test the vehicle and check for proper engine operation. 15. Check the coolant level and add if necessary.
the thermostat is located on the front side of the intake manifold easy to get at
the spring end goes into the engine
up Spring towards the engine.
u face the spring towards the engine
the thermostat should have the long part facing down
on top of the water pump under the intake water hose.
Do this with the engine cold. At the base of the neck of the top radiator hose there are two bolts. Take those two bolts out and the thermostat is right there. lift it out and put the new one in. Then put the radiator hose back on and check the coolant level. I just had to do this on my '89 f250.
The part that sticks down the most is the part you put in first.
spring side will go in block were top hose connect
Spring side would go down. dome or point would face up.
I assume that's the 351 Windsor that has the thermostat mounted vertically in the end of the intake manifold ( The 351 modified and the Cleveland versions have the thermostat mounted horizontally into the engine block )
Temperature Gauge Sending Unit The sending unit is located in the front section of the manifold in the vicinity of the thermostat.