Oldsmobile 89017621 Seal Kit,Crankshaft Front Oil

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Remove the crankshaft balancer and note the installation depth and orientation of the seal, ensuring the new one is installed the same way. Carefully pry the old oil seal out of the timing chain cover using a seal puller or a large screwdriver, taking care not to damage the crankshaft or distort the cover; wrapping electrician's tape around the screwdriver tip can help prevent damage. If replacing the seal with the timing chain cover removed, support the cover on two blocks of wood and drive the seal out from the backside using a hammer and punch, being cautious not to scratch or distort the sealing area to avoid leaks. Apply clean engine oil or multi-purpose grease to the outer edge of the new seal and install it in the cover with the lip facing inward, using a large socket and hammer to drive it into place, ensuring it enters squarely and is at the proper depth. Check the balancer hub surface for grooves caused by long-term contact with the seal; if present, a press-on sleeve may be available to renew the sealing surface, which can be pressed into place with a hammer and block of wood. Lubricate the balancer hub with clean engine oil and reinstall the crankshaft balancer, completing the installation in reverse order of removal.

The oil seal should be pried out using an appropriate tool.

Remove the transmission.

The first step is to take out the driveplate and inspect the oil seal, oil pan, engine block surface, and oil seal housing for any signs of leakage, as an oil pan gasket leak can sometimes mimic a rear oil seal leak.