Hummer H2. Manual - part 1821

1. Clean the components with cleaning solvent. 

2. Dry the components with compressed air. 

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

 

2004 Hummer H2 

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

  

Fig. 462: Camshaft & Crankshaft Sprockets Aligned 
Courtesy of GENERAL MOTORS CORP. 

3. Inspect the timing chain for binding or wear. 

 

2004 Hummer H2 

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

  

Fig. 463: Inspecting Timing Chain Sprocket Teeth 
Courtesy of GENERAL MOTORS CORP. 

4. Inspect the camshaft and crankshaft sprockets for: 

z

Worn teeth (1)  

z

Damaged teeth (2)  

z

Chipped teeth (3)  

z

Worn valleys between the sprocket teeth 

 

2004 Hummer H2 

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

  

Fig. 464: Crankshaft Sprocket 
Courtesy of GENERAL MOTORS CORP. 

5. Inspect the crankshaft sprocket keyway for wear.  

6. Inspect the crankshaft sprocket oil pump drive splines for wear.  

VALVE ROCKER ARM AND PUSH RODS CLEANING AND INSPECTION 

 

2004 Hummer H2 

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