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 |
Inspection
Plug in block heater (6A051) to warm coolant.
Remove fuel return hose (9D308) from fuel pressure regulator.
Remove radiator cap (8100) and install Rotunda Cooling System Pressurization Kit 021-00012 or equivalent. Refer to Pressure Test in the Diagnosis and Testing portion of this section.
Pressurize cooling system to 96.5 kPa (14 psi).
Inspect fuel return hose for fuel or air discharge. The fuel return line that shows evidence of fuel or air discharge indicates which injector bank has a leak.
Remove fuel injector nozzle tip (9E527) from suspect bank. Refer to Section 03-04D.
With the cooling system pressurized, observe upper injector sleeve to cylinder head fit for evidence of leakage.
If leakage is detected repair as required, retest for leaks.
| Item | Part Number | Description |
|---|---|---|
| 1 | 9C968 | Fuel Pressure Regulator (Part of 9155) |
| 2 | 9D308 | Fuel Return Lines |
| 3 | 9155 | Fuel Filter, Heater, Separator |
| 4 | 9E527 | Fuel Injector |
| 5 | — | Fuel Galley (Part of 6049) |
| 6 | — | Leak Point (Injector Sleeve to Cylinder Head) |
| 7 | — | Coolant Galley (Part of 6049) |
| 8 | — | Injector Sleeve (Part of 6049) |
| 9 | 6049 | Cylinder Head |