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

Coolant in Oil

 

Inspection

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

  1. Drain engine oil and remove oil filter (6731). Leave oil pan drain plug (6730) out of oil pan (6675).

  1. Remove engine glow plugs. Refer to Section 03-07B.

  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 area around oil cooler (6A642) and oil filter adapters (6881) for evidence of coolant leaks.

  1. If leak is found at oil cooler, the oil cooler must be removed and pressure tested for internal leaks. Repair or replace as necessary.

  1. Inspect for coolant leaks at the oil pan plug bore.

  1. If no leaks are found, remove oil pan. Inspect crankcase for pressure leaks.

    Coolant in Oil

    ItemPart NumberDescription
    1—Coolant Galley (Part of 6881)
    2—Oil Flow Galley (Part of 6881)
    36881Oil Filter Adapter
    46731Oil Filter
    56C610Inner O-Ring
    66K649Outer O-Ring
    76A642Oil Cooler
    86881Oil Filter Adapter

  1. Inspect cylinder heads (6049) for coolant leaks.

    Coolant Leak Inspection Point — Cylinder Head

  1. If coolant leak still has not been found, remove the engine front cover (6019). Refer to Section 03-01D. Inspect gaskets and sealing surfaces.

    Coolant Leak Inspection Points — Front Cover

    ItemPart NumberDescription
    16019Engine Front Cover
    2—Water Galleys (Part of 6019)
    3—Oil Outlet Galley (Part of 6019)
    46020Front Cover Gasket
    5—Oil Inlet Galley (Part of 6019)

  1. Repair as required. Retest for leaks.