REAR MAIN SEAL REPLACEMENT 1984'J'SERIES CARS & S/T TRUCK

MODELS AFFECTED: 1983-1984 CIMARRONS

Some 1983 and 1984 Cimarrons may experience a rear main seal oil leak. To correct this condition, a new one-piece rear main crankshaft oil seal has been released for service and 1984 production replacing the two-piece seal previously used in all 1983 2.0 liter L-4 engines. The use of the two-piece seal should be discontinued for service and the new one-piece seal should be utilized for all future repairs of these engines. The new one-piece seal kit (P/N 14081761), which is currently available through GMWDD, includes an installation tool, rear main seal, and an instruction sheet.

Before replacing a rear main oil seal, care should be taken in determining the exact source of the leak.

Installation of Narrow One-Piece Crankshaft Seal, P/N 14081761

1. Remove engine and mount on stand in inverted position with coolant and oil drained.

2. Remove crankshaft per Service Manual instructions.

3. With crankshaft out of engine, remove oil seal and clean all sealant and foreign material from cylinder case, bearing cap and crankshaft using a non-abrasive cleaning solvent.

4. Inspect components for nicks, burrs, scratches and machining defects at all sealing and mating surfaces and crankshaft journal.

5. Apply a very thin coat (approximately 1.0 mm bead) of anaerobic sealant 1052357 to O.D. of new seal. Seal should remain on installation tool as received in the seal kit during application of the sealant.

6. Push seal and tool assembly onto the rear of crankshaft as far as it will go. Position the arrow points on the tool toward the cylinder and case assembly as shown in the seal kit instructions.

7. With the tool in place, set the crankshaft in the engine block assembly. Aligning the seal in the case groove.

8. Remove the installation tool, rotating as shown in seal kit instructions, and discard.

9. Apply a light coat of engine oil on crankshaft journals.

10. Apply a 1.0 mm bead of anaerobic sealant 1052357 to the rear main bearing split line surface between the rear main seal and the oil pan seal groove. Install cap and main bearing. Torque bolts to 95 N.m (70 ft.lbs.).

11. Install remaining caps and main bearings. Torque bolts to 95 N.m (70 ft. lbs.).

12. Install connecting rod bearings and caps. Torque to specifications.

13. Complete engine assembly and installation per Cadillac Service Manual.

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.