Hummer H2. Manual — part 1750

Fig. 193: Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.

6. Remove the crankshaft sprocket.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 194: Crankshaft Sprocket Key
Courtesy of GENERAL MOTORS CORP.

7. Remove the crankshaft sprocket key, if required.

8. Clean and inspect the timing chain and sprockets. Refer to Timing Chain and Sprockets Cleaning and

Inspection .

Installation Procedure

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 195: Crankshaft Sprocket Key
Courtesy of GENERAL MOTORS CORP.

1. Install the key into the crankshaft keyway, if previously removed.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 196: Crankshaft Sprocket Key Installation Position
Courtesy of GENERAL MOTORS CORP.

2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2