GM 89018163
Rear Main Seal

To replace the crankshaft rear oil seal, you should first remove the Transmission Assembly and the engine Flywheel. Next, with a suitable tool, remove the crankshaft rear oil seal with care from the crankshaft rear oil seal housing, discard the old oil seal and clean the surroundings of the location of any dirt or rust material. Attack a small quantity (2 to 3 drops) of clean engine oil around bore of the crankshaft rear oil seal housing, the outside diameter of the engine Flywheel pilot flange, the outside diameter of the Flywheel pilot flange, and the Crankshaft Seal surface. Examine the flange of the j 35621-b rear main seal installer (J 35621-B) for imperfections and remove minor ones with smooth grade emery cloth while ensuring that oil or lubricants do not get into the seal lip surface. Thereafter, take the sleeve from the crankshaft rear oil seal and lubricate it with a clean engine oil drop (2 to 3 drops) on its outer diameter. Put the crankshaft rear oil seal on the j 35621-b and put this on the rear of the crankshaft and tighten the tool bolt by hand until snug. Proper alignment is critical; keep the seal close to flush and square to the housing. Turn the j 35621-b wing nut until the seal is properly installed, experience stronger resistance when it comes to bottom of the housing bore. Unscrew the wing nut in the opposite direction, and take off the j 35621-b from the crankshaft. Remove any extra engine oil with the help of a clean rag before putting back the engine Flywheel, and the Transmission Assembly.

Before installing a new crankshaft rear oil seal you must remove the Flywheel. A flat-tipped screwdriver should be used to separate the seal from its housing while you dispose of it after you clean any residue in that area. Two to three drops of clean engine oil need to be applied to the housing bore and the outside diameters of both the engine Flywheel pilot flange and Flywheel locator pin as well as to the Crankshaft Seal surface. The new design reverse-sealed this side out marked component represents the new style. Examine the j 35621-b rear main seal installer (J 35621-B) flange for surface imperfections then smooth them down with fine grade emery cloth. You should prevent the seal lip area from touching any lubricants or oil. Swing the protective sleeve off the seal before applying 2 to 3 drops of clean engine oil onto the outside diameter. First install the j 35621-b and its attached seal against the crankshaft's rear side before tightening its tool bolts by hand until they are evenly snug. Correct positioning of the crankshaft rear oil seal demands absolute precision. Installation must occur near flush while maintaining a square relationship with the housing. Use constant clockwise pressure on the j 35621-b wing nut to drive the seal against the housing bore until you feel increasing torque before reaching the lowest housing position. After turning the wing nut clockwise to release the j 35621-b you should remove it and then clean any remaining engine oil from the tool with a new rag before reinstalling the engine Flywheel.

Use a suitable prying tool to remove the crankshaft front oil seal.

Use a suitable tool to carefully pry the crankshaft rear oil seal from its housing and discard the old seal.

Remove the transmission assembly and the engine flywheel.

Clean all sealing surfaces and inspect the housing for any warping, cracks, wear, or damage.

No, it is important not to lubricate the oil seal sealing surface.

Apply 2 to 3 drops of clean engine oil to the bore of the crankshaft rear oil seal housing, the outside diameter of the engine flywheel pilot flange, the outside diameter of the flywheel locator pin, and the crankshaft seal surface.

Utilize the Cover Aligner/Seal Installer (J 35468) with a hammer to install the seal.

Remove the engine flywheel.

Remove the sleeve from the seal and apply 2 to 3 drops of clean engine oil to the outside diameter of the seal.

Install the bolts and nut, tightening them to 12 Nm (106 inch lbs.).

Turn the J 35621-B wing nut counterclockwise to release it from the seal, then remove the J 35621-B and wipe off any excess engine oil with a clean rag.

Remove the sleeve and apply 2 to 3 drops of clean engine oil to its outside diameter.

Hold the hex on the installer bolt with a wrench and rotate the installer nut clockwise until the seal is fully seated.

Use a suitable seal puller to remove the crankshaft front oil seal.

First, remove the crankshaft balancer.

Ensure that the pre-applied grease on the crankshaft front oil seal is intact.

Remove the flywheel.

Remove the transmission assembly and the engine flywheel.

No, do not lubricate the oil seal's inside diameter (ID) or the crankshaft surface.

Remove the crankshaft rear oil seal from the crankshaft rear oil seal housing.

The J 41479 tapered cone.

Remove it from the crankshaft rear oil seal housing.

Discard the old seal and clean any dirt or rust from the area.

Ensure that the pre-applied grease is intact.

Proper alignment is critical to ensure the seal is near flush and square to the housing to prevent failure.

Ensure it is flush and square to the engine front cover.

Apply a small amount (2 to 3 drops) of clean engine oil to the bore of the crankshaft rear oil seal housing, the outside diameter of the engine flywheel pilot flange, the outside diameter of the flywheel locator pin, and the crankshaft seal surface.

Release the tool by turning the wing nut counterclockwise and remove the J 35621-B from the crankshaft.

Use the Cover Aligner and Seal Installer (J 35468) along with a hammer.

Use the Rear Main Seal Installer (J 35621-B).

Utilize a suitable seal puller to remove the crankshaft front oil seal.

First, remove the crankshaft balancer.

Lubricate the Outside Diameter (OD) of the new oil seal with clean engine oil, taking care not to let oil contact the seal surface.

Remove the J 41478 and inspect the oil seal to ensure it is evenly and completely installed in the front cover bore.

Reinstall the crankshaft balancer.

Insert the J 41478 threaded rod (with nut, washer, guide, and oil seal) into the end of the crankshaft, and then use the J 41478 to install the oil seal into the cover bore.

Ensure it is flush and square to the engine front cover.

Remove the J41478 and inspect the oil seal to ensure it is evenly and completely installed in the front cover bore.

Apply 2 to 3 drops of clean engine oil to the outside diameter of the new seal.