Cadillac 12665076 Seal Assembly, Crankshaft Rear Oil

Remove the transmission and then the driveplate. Pry the Crankshaft Seal from the rear cover with a screwdriver, taking care not to nick or scratch the crankshaft or the seal bore. Note how far the seal is recessed into the housing bore before removal to ensure the new seal is installed to the same depth. Clean the seal bore in the block thoroughly with a shop towel, removing all traces of oil and dirt. Do not lubricate the seal or touch the sealing lip, and ensure the seal is installed in the correct orientation, with the marking (... THIS SIDE OUT ...) visible. Ideally, use a seal installation tool to press the new seal back into place; if unavailable, use a large drift to carefully drive the new seal squarely into the seal bore and flush with the rear cover. Finally, install the driveplate and then the transmission.

If the rear Crankshaft Seal housing has to be pulled off of the engine block, then there is a requirement to align the same in the right position on the end of the crankshaft because the seal is very sensitive and leakages from it are likely to occur if the housing has not been well aligned. First, the transmission is the item to pull out, then the driveplate. Open the rear cover of the automobile, and with a lot of precision, use a screwdriver to remove the Crankshaft Seal without damaging the crankshaft or the seal bore. The depth of the old seal before pulling out for new seal installation must be checked to ensure it is the same depth as the new seal is to be installed to check the bore of the seal in the block using a shop towel to remove all the dirt and oil. Lubrication of the seal and touching the sealing lip should not be done and the orientation of the seal must face with the correct part number. In an ideal world, one should use a seal installation tool to set the new seal back into place; if none is available, one should carefully use a large drift to set the new seal squarely into the seal bore and up against the rear cover. Last, put the driveplate back in and the transmission as well; if it does not want to go back on, then either get some new bolts or grind off the edges of the ones you have.

Apply clean engine oil or multi-purpose grease to the outer edge of the new seal.

Install the new seal with the lip facing inward and the words THIS SIDE OUT facing outward.

The transmission and driveplate must be removed, and the old seal can be pried out with a hooked tool or large screwdriver, taking care not to damage the crankshaft sealing surface.

A large socket can be used to drive the seal squarely into the bore and flush with the rear cover.

All engines, except the 7.4L V8, feature a one-piece rear main seal and a seal housing that attaches to the rear of the engine block.