Chevrolet Silverado / GMC Sierra. Manual — part 356

7. Subtract the piston pin OD measurement from the connecting rod pin bore ID measurement

to determine pin-to-bore clearance. Refer to Engine Mechanical Specifications.

Fig. 434: Identifying Crankshaft Bearing Craters Or Pockets
Courtesy of GENERAL MOTORS CORP.

8. Inspect the connecting rod bearings for craters or pockets. Flattened sections on the bearing

halves indicate fatigue.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 435: Identifying Connecting Rod Bearing Scoring Or Discoloration
Courtesy of GENERAL MOTORS CORP.

9. Inspect the connecting rod bearings for excessive scoring or discoloration.

10. Inspect the connecting rod bearings for dirt or debris imbedded into the bearing material.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 436: View Of Improper Seating
Courtesy of GENERAL MOTORS CORP.

11. Inspect the connecting rod bearings for improper seating indicated by bright, polished

sections of the bearing surface.

12. To determine the piston pin-to-bore clearance, use an inside micrometer and measure the

piston pin bore ID.

13. Subtract the piston pin OD measurement from the piston pin bore ID measurement to

determine pin-to-bore clearance. Refer to Engine Mechanical Specifications.

PISTON AND CONNECTING ROD ASSEMBLE

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 437: View Of Retaining Clip In Pin Bore Groove
Courtesy of GENERAL MOTORS CORP.

1. Install the retainer. The retainer should be seated in the groove of the pin bore.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

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