Chevrolet Silverado / GMC Sierra. Service manual — part 2117

Fig. 20: View Of Special Tool Installed On Engine Block
Courtesy of GENERAL MOTORS CORP.

6. Install the following:

1. J 43690-2 (5)

2. J 43690-3 (4)

3. J 43690-101 (2)

4. 280310 (3)

5. J 43690-5 (1)

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. 21: View Of Swivel Base & Dial Indicator
Courtesy of GENERAL MOTORS CORP.

7. Install the swivel base (1) and dial indicator (2).

8. Adjust per the manufacturers instructions and measure the connecting rod bearing clearance.

A connecting rod with a clearance in excess of 0.076 mm (0.003 in) is considered excessive.
Service components, as required.

CRANKSHAFT BALANCER CLEANING AND INSPECTION

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. 22: View Of Crankshaft Balancer
Courtesy of GENERAL MOTORS CORP.

1. Clean the crankshaft balancer in solvent.

2. Clean the belt grooves of all dirt or debris with a wire brush.

3. Dry the crankshaft balancer with compressed air.

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

4. Inspect the crankshaft balancer for the following conditions:

Worn, grooved, or damaged hub seal surface

A crankshaft balancer hub seal surface with excessive scoring, grooves, rust or other
damage must be replaced.

Minor imperfections on the hub seal surface may be removed with polishing compound
or fine grade emery cloth.

Dirty or damaged belt grooves

The balancer belt grooves should be free of any nicks, gouges, or other damage that
may not allow the belt to track properly.

Minor imperfections may be removed with a fine file.

Worn, chunking, or deteriorated rubber between the hub and pulley

AUTOMATIC TRANSMISSION FLEX PLATE CLEANING AND INSPECTION

IMPORTANT: In order for the belt to track properly, the belt grooves

should be free of all dirt or debris.

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