F 250 4WD HD Pickup V8-460 7.5L VIN G EFI (1997)
Crankshaft Main Bearing Seal: Service and Repair
REMOVAL
1. Remove the oil pan.
2. Loosen all the crankshaft main bearing cap bolts, thereby lowering the crankshaft slightly but not to exceed 0.7938 mm (1/32 inch).
3. Remove the rear crankshaft main bearing cap, and remove the crankshaft rear oil seal from the real! crankshaft main bearing cap and cylinder
block. On the cylinder block half of the crankshaft rear oil seal, use a seal removal tool, or install a small metal screw in one end of the crankshaft
rear oil seal, and pull on the screw to remove the crankshaft rear oil seal.
CAUTION: Use care to prevent scratching or damaging the crankshaft sealing surfaces.
INSTALLATION
1. Carefully clean the seal groove in the rear crankshaft main bearing cap and cylinder block with a brush and solvent-such as lacquer thinner or
Metal Surface Cleaner F4AZ-19A536-RA or equivalent meeting Ford specification WSE-M5B392-A. Also, clean the area where sealer is later to
be applied. Dry the area thoroughly, so that no solvent touches the crankshaft rear oil seal.
2. Dip the split lip-type seal halves in clean engine oil.
3. Carefully install the upper half of the crankshaft rear oil seal (cylinder block) into its groove with undercut side of crankshaft rear oil seal toward
the FRONT of the engine (with the tab side of the crankshaft rear oil seal directed toward the rear face of the cylinder block), by rotating it on the
seal journal of the crankshaft until approximately 9.525 mm (3/8 inch) protrudes below the parting surface.
CAUTION: Be sure no rubber has been shaved from the outside diameter of the crankshaft rear oil seal by the bottom edge of the groove. Do not
allow oil to get on the sealer area.
4. Tighten the remaining crankshaft main bearing cap bolts to specifications.
5. Install the lower half of the crankshaft rear oil seal in the rear crankshaft main bearing cap with undercut side of crankshaft rear oil seal toward the
front of the engine with the tab side of the crankshaft rear oil seal directed toward the rear face of the cylinder block). Allow the crankshaft rear oil
seal to protrude approximately 9.525 mm (3/8 inch) above the parting surface to mate with the upper half of the crankshaft rear oil seal when the
rear crankshaft main bearing cap is installed.
