REMOVAL & INSTALLATION
See Figures 1, 2 and 31968-69 5.0L and 5.8L(W) Engines
The rear oil seal originally installed in these engines is a rope (fabric) type seal. However, all service replacements are of the rubber type.
- Drain the crankcase and remove the oil pan.
- Remove the lower half of the rear main bearing cap and, after removing the old seal from the cap, drive out the pin in the bottom of the seal groove with a punch.
- Loosen all main bearings caps and allow the crankshaft to lower slightly.
The crankshaft should not be allowed to drop more than 1 / 32 in. (0.8mm).
- With a 6 in. (152mm) length of 3 / 16 in. (5mm) brazing rod, drive up on either exposed end of the top half of the oil seal. When the opposite end of the seal starts to protrude, grasp it with pliers and gently pull the other end while the driver end is being tapped.
- After removing both halves of the rope seal and the retaining pin from the lower half of the bearing cap, follow Steps 4 through 10 of the following procedure for 1970 and later V8 engines to install the rubber seal.
Refer to the build dates listed below to determine if the engine is equipped with a split-type or one piece rear main oil seal. Engines after the date indicated have a one-piece seal. 5.0L V8: after 12/1/82; 5.8L(W) V8: after 7/11/83.SPLIT-TYPE SEAL
- 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.
- Carefully clean the seal groove in the cap and block with a brush and solvent.
- Dip the 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. Rotate it on the seal journal of the crankshaft until approximately 3 / 8 in. (9.5mm) protrudes below the parting surface. Be sure no rubber has been shaved from the outside diameter of the seal by the bottom edge of the groove. Do not allow oil to get on the sealer area.
- Tighten the remaining bearing cap bolts to the specifications listed in the Torque Specifications chart in of 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 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.
- Install the rear main bearing cap. Tighten the cap bolts to specification.
- 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.
- Remove the transmission, clutch and/or flywheel.
- Punch two holes in the crankshaft rear oil seal on opposite sides of the crankshaft just above the bearing cap to the cylinder block split line. Install a sheet metal screw in each of the holes. Pry the crankshaft rear main oil seal from the block.
Use extreme caution not to scratch the crankshaft oil seal surface.To install:
- Clean the oil seal recess in the cylinder block and main bearing cap.
- Coat the seal and all of the seal mounting surfaces with oil. Install the seal in the recess, driving it into place with an oil seal installation tool or a large socket.
- Install the flywheel and/or clutch, and transmission in the reverse order of removal.
If the oil seal is being replaced in conjunction with a rear main bearing replacement, the engine must be removed from the car.
- Remove the starter.
- On cars equipped with automatic transmissions, remove the transmission. On cars equipped with manual transmissions, remove the transmission, clutch, flywheel and engine rear cover plate.
- With an awl, punch holes in the main bearing oil seal, on opposite sides of the crankshaft and just above the bearing cap to cylinder block split line. Insert a sheet metal screw in each hole. With two large prytools, pry the oil seal out.
- Clean the oil recess in the cylinder block, main bearing cap and the crankshaft sealing surface.
- Lubricate the entire oil seal. Install and drive the seal into its seal 0.005 in. (0.127mm) below the face of the cylinder block with Ford tool T-65L-6701-A, or a socket of the proper diameter.
- The remaining procedure is the reverse of removal.