Chevrolet Silverado / GMC Sierra. Service manual — part 195

1. Install the crankshaft balancer key into the crankshaft keyway.

The crankshaft balancer key should be parallel to the crankshaft or with a slight incline.

Fig. 651: Installing Crankshaft Sprocket Using J 5590
Courtesy of GENERAL MOTORS CORP.

2. Align the keyway of the crankshaft sprocket with the crankshaft balancer key.

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

3. Use the J 5590 in order to install the crankshaft sprocket. See Special Tools.

Fig. 652: Camshaft Sprocket And Camshaft Timing Chain
Courtesy of GENERAL MOTORS CORP.

4. Rotate the crankshaft until the crankshaft sprocket alignment mark is at the 12 o'clock

position.

5. Install the camshaft sprocket and the camshaft timing chain.

IMPORTANT: Install the camshaft sprocket with the alignment mark at the

6 o'clock position.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 653: View Of Sprockets & Chain
Courtesy of GENERAL MOTORS CORP.

6. Look to ensure that the crankshaft sprocket is aligned at the 12 o'clock position and

camshaft sprocket is aligned at the 6 o'clock position.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 654: Camshaft Sprocket & Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE:

Refer to Fastener Notice .

IMPORTANT: Do not use a hammer to install the camshaft sprocket onto

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado