Chevrolet Silverado / GMC Sierra. Service manual — part 580

Fig. 9: View Of Piston Rings & Piston Expander
Courtesy of GENERAL MOTORS CORP.

4. Apply engine oil to the piston ring grooves.

5. Install the piston rings using a piston ring expander.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 10: Aligning Piston Ring End Gaps
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The 2N mark on the 2nd compression ring must face

upwards. The piston has a groove between the 1st and the

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

6. Orientate the piston ring end gaps as illustrated.

CYLINDER HEAD DISASSEMBLE

Tools Required

J 8062 Valve Spring Compressor

J 38820 Valve Stem Oil Seal Remover. See Special Tools .

Disassemble

2nd compression rings to allow for expansion of blowby
gases. No ring is to be installed in this groove.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 11: Compressing Valve Spring Using J 8062
Courtesy of GENERAL MOTORS CORP.

1. Use the J 8062 to compress the valve spring.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado