Section 03-04D: Fuel Charging and Controls, 7.3L Diesel Engine
1996 F-250, F-350 and F-Super Duty Workshop Manual
CLEANING AND INSPECTION

Fuel in Coolant Leak

 

Inspection

  1. Plug in block heater (6A051) to warm coolant.

  1. Remove fuel return hoses (9D308) from fuel pressure regulator.

  1. Remove radiator cap (8100). Install Rotunda Cooling System Pressurization Kit 021-00013 or equivalent. Refer to Section 03-03 for cooling system pressure test.

  1. Pressurize cooling system to 96.5 kPa (14 psi).

  1. Inspect fuel return hoses for fuel or air discharge. The fuel return line that shows evidence of fuel or air discharge indicates which injector bank has a leak.

  1. Remove fuel injectors (9F593) from suspect bank. Refer to Section 03-04D.

  1. With the cooling system pressurized, observe upper injector sleeve to cylinder head fit for evidence of leakage.

  1. If leakage is detected, repair as required. Retest for leaks.

    Fuel in Coolant

    ItemPart NumberDescription
    19C968Fuel Pressure Regulator (Part of 9155)
    29D308Fuel Return Hoses
    39155Fuel Filter, Heater, Separator
    49F593Fuel 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)
    96049Cylinder Head