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Fig. 628: View Of Crankshaft Rear Oil Housing 3. Install the crankshaft rear oil housing onto the crankshaft rear oil seal housing retainer stud. 4. Install the crankshaft rear oil seal housing nut and bolts. Tighten: Tighten the crankshaft rear oil seal housing nut and bolts to 12 N.m (106 lb in).
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 629: Identifying Crankshaft Rear Oil Seal 5. Inspect the J 35621-B flange for imperfections that may damage the crankshaft rear oil seal. See Special Tools. Minor imperfections may be removed with a fine grade emery cloth. 6. Clean the crankshaft sealing surface with a clean, lint free towel. Inspect the lead-in edge of IMPORTANT: Notice the direction of the rear oil seal. The new design seal is a reverse style as opposed to what has been used in the
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
the crankshaft for burrs or sharp edges that could damage the rear main oil seal. Remove the 7. Carefully remove the protection sleeve from the NEW crankshaft rear oil seal. Fig. 630: Identifying Crankshaft Rear Oil Seal 8. Install the crankshaft rear oil seal onto the J 35621-B . See Special Tools. 9. Install the J 35621-B onto the rear of the crankshaft and hand tighten the tool bolts until snug. See Special Tools. IMPORTANT: Do not apply or use any oil lubrication on the crankshaft rear oil seal or seal installer. Do not touch the sealing lip of the NOTE: Proper alignment of the crankshaft rear oil seal is critical.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
10. Install the crankshaft rear oil seal onto the crankshaft and into the crankshaft rear oil seal housing. 1. Turn the J 35621-B wing nut clockwise until the crankshaft rear oil seal is installed near to flush and square to the crankshaft rear oil seal housing. See Special Tools. 2. Turn the J 35621-B wing nut counterclockwise to release the J 35621-B from the crankshaft rear oil seal. See Special Tools. 11. Remove the J 35621-B from the crankshaft. See Special Tools. 12. Wipe off any excess engine oil with a clean rag. PISTON, CONNECTING ROD, AND BEARING INSTALLATION Tools Required J 8037 Ring Compressor. See Special Tools. J 8087 Cylinder Bore Gage J 45059 Angle Meter. See Special Tools. Piston Selection Install the crankshaft rear oil seal near to flush and square to IMPORTANT: Powdered metal connecting rods and rod bearing caps are NOT interchangeable, and must be assembled with the mating
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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