Section 03-03: Engine Cooling | 1997 F-250, F-350 and F-Super Duty Workshop Manual |
| Engine | Vehicle | Equipment | Approximate Capacity | ||
|---|---|---|---|---|---|
| Liters | U.S. Quarts | Imperial Quarts | |||
| 5.8L (351 CID) V-8 | F-250 | Manual Trans. — Standard | 14 | 15 | 12 |
| 5.8L (351 CID) V-8 | F-250 | Auto. Trans. — Standard or A/C, Manual Trans. with A/C | 15 | 16 | 13 |
| 5.8L (351 CID) V-8 | F-250 | Manual and Auto. Trans. with Super Cool or Super Cool and A/C | 16 | 17 | 14 |
| 7.5L (460 CID) V-8 | F-250, F-350, F-Super Duty Chassis Cab and Motor Home Chassis Vehicles | All Options | 18 | 18 | 15 |
| 7.3L Diesel | F-250, F-350 and F-Super Duty Chassis Cab | All Options | 21a | 23a | 18a |
| Vehicle | Operating Pressure | Min. Test Pressure |
|---|---|---|
| 5.8L | 90 kPa (13 psi) | 69 kPa (10 psi) |
| 7.3L | 110 kPa (16 psi) | 97 kPa (14 psi) |
Refer to Master Parts List for service part numbers and applications.
Service refill recommendations are 50/50 mixture of water and permanent coolant/antifreeze such as Ford Premium Cooling System Fluid E2FZ-19549-AA or B or equivalent meeting specification ESE-M97B44-A plus 1.41 (1.5 qts) of Heavy Duty Cooling System Additive FW-15 or equivalent meeting Ford specification ESN-M99B169-A.
Minimum acceptable coolant/water concentration is 45 percent antifreeze to 55 percent water. Maximum acceptable is 60 percent coolant to 40 percent water. Use only a hand-held refractometer such as Rotunda Battery/Antifreeze Tester 014-R1060 or equivalent to check concentration.
In an emergency, ordinary tap water with a low alkali content can be used provided the system is drained and flushed and filled with the specified coolant/water mixture as soon as possible. Use only if temperature is above 0°C (32°F).
NOTE: 7.3L diesel engines require a supplemental coolant additive to provide corrosion protection consistent with diesel engine characteristics. Without the supplemental additive, Motorcraft FW-15 or equivalent, cylinder wall erosion can occur.
The recommended quantity of coolant additive when refilling the entire cooling system is 1.4 liters (1-1/2 quarts). Refreshing the coolant mixture with an additional 237 ml (8 oz) of Motorcraft FW-15, or equivalent, each 15,000 miles (24,000 km) or 12 months is recommended.
| Engine | Start to Open °C (°F) | Fully Open °C (°F) |
|---|---|---|
| 7.3L Diesel | 104 (205) | 122 (220) |
| Engine | Vehicle | Equipment | Water Pump Pulley Ratio | Engine rpm Required to Run Water Pump at 3000 rpm | Water Pump Fan Test Speed | ||
|---|---|---|---|---|---|---|---|
| Minimum Fan rpm at Disengagement Temperature | Minimum Fan rpm at Engaged Temperature | Water Pump Test Speed | |||||
| 7.5L (460 CID) V-8 | F-250, F-350 and F-Super Duty | with A/C | 1.25 | 2400 | 1900 @ 141°F | 2600 @ 211°F | 3000 |
| 7.5L (460 CID) V-8 | F-250, F-350 and F-Super Duty | Without A/C | 1.25 | 2400 | 1900 @ 125°F | 2600 @ 195°F | 3000 |
| 7.3L Diesel | F-250, F-350 and F-Super Duty Chassis Cab | All Options | 1.1 | 3000 | 650 @ 122°F | 2900 @ 200°F | 3300 |
| Description | Nm | Lb-Ft | Lb-In |
|---|---|---|---|
| Water Hose Connection, All Engines Except 7.5L | 16-24 | 12-18 | — |
| Water Hose Connection, 7.5L | 32-37 | 24-27 | — |
| Block Heater Retaining Bolt | 1.6-1.8 | — | 14-16 |
| Fan Shroud to Radiator, F-250, F-350 | 5-7 | 44-62 | — |
| Fan Shroud to Radiator, F-Super Duty Motorhome | 6-8 | — | 53-71 |
| Fan Clutch Assembly to Water Pump, All V-8 Engine Except 7.3L | 16-24 | 12-18 | — |
| Fan Clutch Assembly to Water Pump, 7.3L Diesel | 113-153 | 84-112 | — |
| Water Temperature Indicator Sender Unit | 11-24 | 8-18 | — |
| Bypass Hose Clamps, 5.8L | 3-4 | 27-35 | — |
| Bypass Hose Clamps, 7.5L | 1.3-2.2 | 12-20 | — |
| Transmission Oil Line Nut to Fitting on Radiator | 16-24 | 12-18 | — |
| Oil Cooler Line Clamps | 4-5 | — | 35-44 |
| Radiator Drain Cock Stem to Radiator Drain Cock | 0.7-1.4 | — | 6-12 |
| Water Hose Connection 7.3L Diesel | 20 | 15 | — |
| Fan to Fan Clutch, 7.3L Diesel | 16-24 | 12-18 | — |
| Engine Block Heater Cable to Frame Bolt | 7-9 | — | 62-80 |