C 1500 Truck 2WD V6-4.3L VIN X (2003)
Crankshaft Main Bearing Seal: Service and Repair
Crankshaft Rear Oil Seal Replacement
Tools Required J35621-B Rear Main Seal Installer
Removal Procedure
1. Remove the flywheel.
2. Insert a flat-tipped screwdriver into the access notches and carefully pry tree 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 clear, engine oil to the outside diameter of the flywheel locator pin.
4. Apply 2 to 3 drops Or cloak engine oil to the crankshaft seal surface.
5. Inspect the J35621B flange for imperfections that may damage the NEW seal
Minor imperfections may be removed with a fine grade emery cloth.
Important: DO NOT alley oil or any other lubricants to contact the seal lip surface of the seal.
6. Remove the sleeve from the seal.
7. Apply 2 to 3 drops of clean engine oil to the outside diameter of the seal.
8. Install the seal onto the J35621-B.
9. Install the J35621-B onto the rear of the crankshaft and hand tighten the tool bolts until snug.
Notice: Proper alignment of the crankshaft rear oil seal is critical. Install the crankshaft rear oil seal near to flush and square to the crankshaft rear oil
seal housing. Failing to do so may cause the crankshaft rear oil seal or the crankshaft rear oil seal installation tool to fail.
10. Install the seal onto the crankshaft and into the housing.
10.1.
Turn the J35621-Wing nut clockwise until the seal is installed close to flush and square to the housing.
