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Chevrolet Silverado / GMC Sierra. Manual - part 2166
1. With a micrometer at a right angle, measure the piston outside diameter (OD). Measure the
diameter 43 mm (1.69 in) from the top of the piston. 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) .
2. Record the piston OD.
assembly may be installed if, after inspection is within
specifications.
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. 180: Measuring Bore Gauge With Micrometer
Courtesy of GENERAL MOTORS CORP.
3. Adjust the micrometer to the recorded piston OD.
4. Insert the J 8087 into the micrometer and zero the gage dial.
Fig. 181: Measuring Cylinder 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
Courtesy of GENERAL MOTORS CORP.
5. Using the J 8087 , measure the cylinder bore inside diameter (ID). Measure at a point 64
mm (2.5 in) from the top of the cylinder.
6. Record the cylinder bore ID.
7. Subtract the piston OD from the cylinder bore ID in order to determine the piston-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) .
8. If the proper clearance cannot be obtained, select another piston and pin assembly and
measure the clearances again. If the proper fit cannot be obtained, the cylinder bore may
require honing for an oversize piston.
Piston, Pin, and Connecting Rod Installation
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. 182: View Of Piston, Connecting Rod & Bearing Assembly
Courtesy of GENERAL MOTORS CORP.
1. Lubricate the following components with clean engine oil:
Piston
Piston rings
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
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