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4. Measure the crankshaft journal diameter across four points. The crankshaft journal outside diameter is 79.905-79.925 mm (3.1459-3.1466 in) and Replace the crankshaft if the measured value is less than the service limit. 5. Measure the crankpin outside diameter across four points. The crankpin outside diameter is 62.902-62.922 mm (2.4765-2.4772 in) and the Replace the crankshaft if the measured value is less than the service limit. Crankshaft Bearing Selection There are two methods for selecting the proper size crankshaft bearings. The first one is to select Crankshaft Bearing Selection Grade Chart Method Stamp ID Main Journal Conn. Rod Journal No Stamp STD STD M20 R20 0.020 in 0.020 in
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 178: Locating Crankshaft Stamping Marks (Undersized Main or Rod Journals) 1. Inspect the crankshaft for stamping (1) indicating undersized main and/or rod journals. IMPORTANT: All crankshafts that have been machined have a steel stamping (1) on the 1st counterweight.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 179: View Of Cylinder Block Grade 2. The cylinder block grade is indicated on the right lower portion of the cylinder block.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 180: View of Crankshaft Journal Grade 3. The crankshaft journal grade is indicated on the number 1 crankshaft counterweight. 4. Match the cylinder block grade and the crankshaft journal grade, refer to Crankshaft Bearing Selection Specifications .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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