Sierra 1500 4WD V6-4.3L (2008)
Crankshaft Main Bearing Seal: Service and Repair
Crankshaft Rear Oil Seal Replacement
Tools Required
J 35621-B Rear Main Seal Installer
Removal Procedure
1. Remove the flywheel. Refer to Engine Flywheel Replacement (See: Transmission and Drivetrain/Flex Plate/Service and Repair) .
2. Insert a flat-tipped screwdriver into the access notches and carefully pry the seal from the housing.
3. Discard the seal.
4. Clean off any dirt or rust in the area.
Installation Procedure
1. Apply 2 to 3 drops of clean engine oil to the bore of the housing.
2. Apply 2 to 3 drops of clean engine oil to the outside diameter of the engine flywheel pilot flange.
3. Apply 1 drop of clean engine oil to the outside diameter of the flywheel locator pin.
4. Apply 2 to 3 drops of clean engine oil to the crankshaft seal surface.