Chevrolet Silverado / GMC Sierra. Service manual — part 193

3. Install the balance shaft retainer and bolts.

Tighten: Tighten the bolts to 12 N.m (106 lb in).

Fig. 644: Locating Balance Shaft Driven Gear
Courtesy of GENERAL MOTORS CORP.

4. Install the balance shaft driven gear onto the balance shaft.

5. If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or

equivalent, to the threads of the balance shaft driven gear bolt.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

6. Install the balance shaft driven gear bolt.

1. Use a wrench to secure the balance shaft.

Place the wrench onto the balance shaft near to the balance shaft front bearing.

2. Install the balance shaft driven gear bolt.

Tighten:

1. Tighten the balance shaft driven gear bolt on the first pass to 20 N.m (15 lb ft).

2. Tighten the balance shaft driven gear bolt on the final pass using the J 45059 an

additional 35 degrees. See Special Tools.

7. Remove the wrench from the balance shaft.

8. Rotate the balance shaft by hand in order to ensure that there is clearance between the

balance shaft and the valve lifter pushrod guide. If the balance shaft does not rotate freely,
check to ensure that the retaining ring on the balance shaft front bearing is seated on the
case.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 645: View Of Balance Shaft Drive Gear
Courtesy of GENERAL MOTORS CORP.

9. Install the balance shaft drive gear.

IMPORTANT: DO NOT install the camshaft sprocket bolts at this time.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 646: Balance Shaft Drive Gear Camshaft Timing Mark
Courtesy of GENERAL MOTORS CORP.

10. Rotate the engine camshaft so that the timing mark on the balance shaft drive gear is in the

12 o'clock position.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado