Section 03-03: Engine Cooling | 1996 F-150, F-250, F-350, F-Super Duty, Bronco Vehicles and F-250, F-350 and F-Super Duty Vehicles with 7.3L Diesel Engines Workshop Manual |
A poppet-type water thermostat (8575) is used with all engines (6007).
When the water thermostat is closed, coolant flows to the water pump (8501) through a bypass passage at the front of the engine. When the water thermostat is open, coolant flows through the coolant outlet elbow (thermostat housing) to the radiator (8005).
The water thermostat used in production is a high temperature water thermostat for use with a mixture of water and permanent-type antifreeze. A low temperature water thermostat should be installed if a non-permanent type antifreeze and water coolant solution is used.