Chevrolet Silverado / GMC Sierra. Service manual — part 146

average bearing inside diameter.

7. Compare the readings to specifications. Refer to Engine Mechanical Specifications.

8. Replace bearing halves as required to obtain the proper bearing clearances.

Measuring Connecting Rod Bearing Clearances - J 43690 Method

1. Remove the oil pan and other necessary components to gain access to the connecting rods.

Remove the oil pump assembly.

2. Rotate the crankshaft until the crankshaft journal/connecting rod to be measured is in the 10

o'clock position.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 489: Bearing Cap Bolts, Cap & Bearing Half
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The crankshaft must be secure with no movement or rotation

in order to obtain an accurate reading. Remove an

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

3. Remove the bearing cap bolts, cap and bearing half.

4. Insert a piece of paper card stock onto the crankshaft journal. Install the bearing half,

bearing cap, and bolts. Refer to Fastener Tightening Specifications.

intermediate bearing cap, as required, in order to secure the
crankshaft and allow measurement of connecting rod bearing
clearances.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 490: Pivot Arm Assembly Foot & Bolt
Courtesy of GENERAL MOTORS CORP.

5. Install the foot (1) and bolt (2) to the pivot arm assembly (3). Tighten the bolt until snug.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado