REAR MAIN CRANKSHAFT SEAL SERVICE INFORMATION

Subject: POLYACRYLIC (RUBBER) REAR MAIN CRANKSHAFT SERVICE SEAL - 1982 1.8L L-4 ENGINE - VIN CODE "G"

When service replacement of the rear main crankshaft seal in a 1982 L-4 engine is required, a new rubber split seal should be used.

The new seal (unit part number 14069889) has been released for 1982 model service and replaces the current rope seal.

When installing the new rubber rear seal, the following procedure should be used:

1. Remove oil pan and oil pump.

2. Remove rear main bearing cap.

3. Remove upper and lower rope seal. Clean seal channel to remove any rope pieces and oil.

Loosening numbers 2, 3 and 4 main bearing bolts may be necessary in both removing the upper rope seal and installing the new upper seal.

4. Apply very thin coat of GM gasket sealing compound (part number 1050026) or equivalent, to O.D. of rubber seal as shown in illustration. (Keep sealing compound off of seal lips.) Roll seal into position in cylinder case; turning crankshaft will help seal roll into position. A piece of shim stock may be used to prevent damaging seal O.D. during instal- lation.

Seal lip must be positioned inboard of the engine and the small dust lip to the flywheel side.

5. Apply GM gasket sealing compound in manner described above to other half of new seal and install in main bearing cap.

6. Apply a 1mm bead (approximately 1/32") of anaerobic sealant (part number 1052357) or equivalent, to the cap between the rear main seal end and the oil pan rear seal groove.

- Keep sealant off the rear main seal, bearing and out of the drain slot.

7. Just prior to assembly, apply a light coat of engine oil on the crankshaft surface that will contact the seal.

8. Install rear main bearing cap. Torque bolts to 95 Nm (70 ft. lbs.). If other main bearing bolts were loosened, retorque as necessary.

9. Install oil pump and oil pan.

10. When running engine to confirm leak repair, insure the PCV system, including the fresh air pipe from air cleaner to rocker cover is fully assembled.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.