Genuine Oldsmobile Omega Crankshaft Seal

Oldsmobile Omega Crankshaft Seal Parts Questions & Experts Answers

• Seal Assembly, Crankshaft Rear Oil
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  Q: How should both halves of the rear crankshaft seal be serviced as a unit on Oldsmobile Omega?

  A:

  Always service both halves of the rear Crankshaft Seal as a unit. While replacing this seal is much easier with the engine removed from the car, it can be done with the engine in place. Begin by removing the Oil Pan and Oil Pump, followed by the rear main bearing cap from the engine. Use a screwdriver to pry the lower half of the Crankshaft Seal from the bearing cap. For the upper half, utilize a small hammer and a brass pin punch to roll the seal around the crankshaft journal, tapping one end until the other end protrudes enough to pull it out with pliers. Clean all sealant and foreign material from the cylinder bearing cap and case without using abrasive cleaners, and inspect components for nicks, scratches, or burrs at all sealing surfaces. Coat the seal lips of the new seal with light engine oil, avoiding oil on the seal mating ends. A small plastic installation tool should be included with the purchase of the rear Crankshaft Seal. Position the narrow end of this tool between the crankshaft and the seal seat to protect the new seal from damage. Raise the new upper half of the seal into position with the seal lips facing the front of the engine, pushing it onto its seat while using the installation tool for protection. Roll the seal around the crankshaft, using the tool as a shoehorn, and once both ends of the seal are flush with the engine block, carefully remove the installation tool without withdrawing the seal. Install the lower half of the Crankshaft Seal to the bearing cap, again using the installation tool for protection, ensuring the seal is firmly seated before withdrawing the tool. Smear a bit of sealant to the bearing cap areas adjacent to the seal ends, then install the bearing cap with the seal and torque the attaching bolts to about 10 to 12 ft-lb. Tap the end of the crankshaft first rearward, then forward to align the thrust surfaces, retorque the bearing cap bolts to the proper specification, and finally install the oil pump and oil pan.