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
WARNING: DO NOT STAND IN LINE WITH OR NEAR ENGINE COOLING FAN BLADE (8600) WHEN ENGINE (6007) IS RUNNING.
WARNING: NEVER REMOVE THE RADIATOR CAP (8100) UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO THE COOLING SYSTEM OR ENGINE OR PERSONAL INJURY. TO AVOID HAVING SCALDING HOT COOLANT OR STEAM BLOW OUT OF THE RADIATOR (8005), USE EXTREME CARE WHEN REMOVING THE RADIATOR CAP FROM A HOT RADIATOR. WAIT UNTIL THE ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE RADIATOR CAP AND TURN IT SLOWLY TO THE FIRST STOP. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN YOU ARE SURE ALL THE PRESSURE HAS BEEN RELEASED, PRESS DOWN ON THE RADIATOR CAP (STILL WITH A CLOTH), TURN AND REMOVE IT.
To prevent loss of coolant when draining the radiator, attach a hose on the radiator draincock (8115) and drain the coolant from the radiator into a clean container.
To drain the radiator, open the radiator draincock located at the bottom of the radiator and remove the radiator cap or supply tank cap. The cylinder block of the V-8 engine is drained by removing the drain plugs located on both sides of the cylinder block (6010). The six-cylinder engines have one drain plug located at the right rear of the cylinder block.
If replacing coolant, dispose of old coolant in accordance with applicable federal, state, and local laws and regulations. Promptly clean up any spilled coolant.
Without degas bottle, fill the cooling system by installing the cylinder block drain plug(s) and close the radiator draincock. Disconnect the heater outlet hose at the water pump (8501) to bleed or release trapped air in the system. When the coolant begins to escape, connect the heater outlet hose.
Fill the radiator until the coolant is between the cap seal in the filler neck to 38mm (1-1/2 inches) below the cap seal. Install radiator cap.
Start engine, warm up, shut off engine. Allow engine to cool, remove radiator cap and check coolant level. Fill as required.
With degas bottle, fill the cooling system by installing all drain plugs and close the radiator draincock. Fill the degas bottle until the coolant level stabilizes at the top hose of the degas bottle. Start engine, warm up, shut off engine. Allow engine to cool. Verify that the level is within the fill range on the bottle.