Chevrolet Silverado / GMC Sierra. Service manual — part 2124

Fig. 43: 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 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 44: Crankshaft Bearing Polished Sections (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 (RPO LY5
VIN J) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine Mechanical
Specifications (RPO LY2 VIN C) or Engine Mechanical Specifications (RPO LH6
VIN M) or Engine Mechanical Specifications (RPO LMG VIN 0) or Engine
Mechanical Specifications (RPO LY6 VIN K) or Engine Mechanical Specifications
(RPO L76 VIN Y) or Engine Mechanical Specifications (RPO L92 VIN 8) .

PISTON AND CONNECTING ROD ASSEMBLE

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 45: 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 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 46: Locating Mark On Top Of Piston & Connecting Rod Tab
Courtesy of GENERAL MOTORS CORP.

2. Assemble the piston and connecting rod. The mark (1) on the top of the piston and the tab

(2) on the side of the connecting rod should be facing the same direction.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado