Early 1987 7.5L Engines With a 2-Piece Seal
See Figures 1, 2 and 3
- Remove the oil pan and the oil pump (if required).
- Loosen all the main bearing cap bolts, thereby lowering the crankshaft slightly but not to exceed 1 / 32 in. (0.8mm).
- Remove the rear main bearing cap and remove the oil seal from the bearing cap and cylinder block. On the block half of the seal use a seal removal tool, or install a small metal screw in one end of the seal and pull on the screw to remove the seal. Exercise caution to prevent scratching or damaging the crankshaft seal surfaces.
- Remove the oil seal retaining pin from the bearing cap if so equipped. The pin is not used with the split-lip seal.
- Carefully clean the seal groove in the cap and block with a brush and solvent such as lacquer thinner, spot remover, or equivalent, or trichloroethylene. Also, clean the area thoroughly, so that no solvent touches the seal.
- Dip the split lip-type seal halves in clean engine oil.
- Carefully install the upper seal (cylinder block) into its groove with undercut side of the seal toward the FRONT of the engine, by rotating it on the seal journal of the crankshaft until approximately 3 / 8 in. (9.5mm) protrudes below the parting surface.
- Tighten the remaining bearing cap bolts to the figures listed in the Torque Specifications chart in this section.
- Install the lower seal in the rear main bearing cap under undercut side of seal toward the FRONT of the engine, allow the seal to protrude approximately 3 / 8 in. (9.5mm) above the parting surface to mate with the upper seal when the cap is installed.
- Apply an even 1 / 16 in. (1.6mm) bead of RTV silicone rubber sealer, to the areas shown, following the procedure given in the illustration.
This sealer sets up in 15 minutes.
- Install the rear main bearing cap. Tighten the cap bolts to specifications.
- Install the oil pump and oil pan. Fill the crankcase with the proper amount and type of oil.
- Operate the engine and check for oil leaks.
4.9L, 5.0L and 5.8L Engines; Most 1987 and All 1988-96 7.5L Engines
If the crankshaft rear oil seal replacement is the only operation being performed, it can be done in the vehicle as detailed in the following procedure. If the oil seal is being replaced in conjunction with a rear main bearing replacement, the engine must be removed from the vehicle and installed on a work stand.
- Remove the starter.
- Remove the transmission from the vehicle.
- On manual shift transmission, remove the pressure plate and cover assembly and the clutch disc following the procedure in Drive Train .
- Remove the flywheel attaching bolts and remove the flywheel and engine rear cover plate.
- Use an awl to punch two holes in the crankshaft rear oil seal. Punch the holes on opposite sides of the crankshaft and just above the bearing cap to cylinder block split line. Install a sheet metal screw in each hole. Use two small pry bars to pry against both screws at the same time to remove the crankshaft rear oil seal. It may be necessary to place small blocks of wood against the cylinder block to provide a fulcrum point for the pry bars. Use caution throughout this procedure to avoid scratching or otherwise damaging the crankshaft oil seal surface.
- Clean the oil seal recess in the cylinder block and main bearing cap.
- Clean, inspect and polish the rear oil seal rubbing surface on the crankshaft. Coat the new oil seal and the crankshaft with a light film of engine oil. Start the seal in the recess with the seal lip facing forward and install it with a seal driver. Keep the tool straight with the centerline of the crankshaft and install the seal until the tool contacts the cylinder block surface. Remove the tool and inspect the seal to be sure it was not damaged during installation.
- Install the engine rear cover plate. Position the flywheel on the crankshaft flange. Coat the threads of the flywheel attaching bolts with oil-resistant sealer and install the bolts. Tighten the bolts in sequence across from each other to the specifications listed in the Torque chart at the end of this section.
- On a manual shift transmission, install the clutch disc and the pressure plate assembly following the procedure in Drive Train .
- Install the transmission, following the procedure in Drive Train .
See Figures 4, 5 and 6
- Remove the transmission, clutch and flywheel assemblies.
- Remove the engine rear cover.
- Using an arbor press and a 4 1 / 8 in. (104.775mm) diameter spacer, press out the rear oil seal from the cover.
- Clean the rear cover and engine block surfaces. Remove all traces of old RTV sealant from the oil pan and rear cover sealing surface by cleaning with a suitable solvent and drying thoroughly.
- Coat the new rear oil seal with Lubriplate® or equivalent. Using an arbor press and spacer, install the new seal into the cover.
The seal must be installed from the engine block side of the rear cover, flush with the seal bore inner surface.
- Install a seal pilot, Ford part no. T83T-6701B or equivalent onto the crankshaft.
- Apply gasket sealant to the engine block gasket surfaces and install the rear cover gasket to the engine.
- Apply a 1 / 4 in. (6mm) bead of RTV sealant onto the oil pan sealing surface, immediately after rear cover installation.
- Push the rear cover into position on the engine and install the cover bolts and tighten them to 15 ft. lbs. (20 Nm).
- Position the flywheel on the crankshaft flange. Coat the threads of the flywheel attaching bolts with sealant and install the bolts and flexplate, if equipped. Tighten the bolts to specification, alternating across from each bolt.
- Install the clutch and transmission. Run the engine and check for oil leaks.