Hummer H2. Manual - part 1860

3. Using the bolts as a handle, carefully install the camshaft into the engine block.  

4. Remove the 3 bolts from the front of the camshaft. 

Fig. 603: Camshaft Retainer & Bolts 
Courtesy of GENERAL MOTORS CORP. 

removing or installing the camshaft to avoid damage to the camshaft 
bearings.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

IMPORTANT:

z

Install the retainer plate with the sealing gasket facing the engine 
block.  

z

The gasket surface on the engine block should be clean and free of 

 

2004 Hummer H2 

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

  

5. Install the camshaft retainer and the bolts. 

Tighten: Tighten the camshaft retainer bolts to 25 N.m (18 lb ft). 

6. Inspect the camshaft sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be used again.  

7. Lubricate the O-ring seal with clean engine oil. 

Fig. 604: Camshaft Sensor & Bolt 
Courtesy of GENERAL MOTORS CORP.

dirt or debris.  

 

2004 Hummer H2 

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

  

8. Install the camshaft position (CMP) sensor and bolt. 

Tighten: Tighten the CMP sensor bolt to 25 N.m (18 lb ft). 

TIMING CHAIN AND SPROCKETS INSTALLATION 

Tools Required 

J 41665 Crankshaft Balancer and Sprocket Installer. See Special Tools and Equipment . 

Fig. 605: 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. 606: Installed Crankshaft Key 
Courtesy of GENERAL MOTORS CORP. 

2. Tap the key (122) 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