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2008 6.6L Duramax – Crankshaft Bearing Selection Grade Chart Method

2. The cylinder block grade is indicated on the right lower portion of the cylinder block.

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.

5. From the Crankshaft Bearing Grade chart, determine which bearing grade (color code) is required.
6 . Verify the crankshaft bearing clearance using the plastic gage method.