Chevrolet Silverado / GMC Sierra. Service manual — part 352

Fig. 420: Piston Pin, Piston & Connecting Rod
Courtesy of GENERAL MOTORS CORP.

5. Remove the pin from the piston and connecting rod.

6. The piston and pin are a matched set and are not to be serviced separately.

Mark, sort, or organize the piston and the matching piston pin.

PISTON, CONNECTING ROD, AND BEARING CLEANING AND INSPECTION

Piston, Pin, and Piston Rings

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 421: View Of Piston, Pin & Piston Rings
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

Replace pistons, pins, and connecting rods that are
damaged or show signs of excessive wear.

The piston and pin are to be serviced as an assembly.

Do not wire brush any part of the piston.

Measurement of the components should be taken with
the components at normal room temperature.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

1. Clean the varnish and carbon from the piston (107) using cleaning solvent.

2. Dry the components with compressed air.

CAUTION: Refer to Safety Glasses Caution .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 422: Cleaning Piston Ring Grooves With Suitable Ring Groove Cleaning Tool
Courtesy of GENERAL MOTORS CORP.

3. Clean the piston ring grooves with a suitable ring groove cleaning tool.

4. Clean the oil lubrication holes and slots.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2