Hummer H2. Manual - part 1817

5. Insert the tool through the front of the engine block and into the bearing.  

6. Tighten the expander assembly (15) nut until snug.  

7. Push the guide cone (1) into the front camshaft bearing to align the tool. 

Fig. 448: Driving Bearing From Block Bore 
Courtesy of GENERAL MOTORS CORP. 

8. Drive the bearing from the block bore. 

9. Repeat the above procedures to remove the remaining bearings. 

IMPORTANT: To remove the front camshaft bearing, operate the tool from the rear of 

the block using the guide cone in the rear camshaft bearing bore.

 

2004 Hummer H2 

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

  

Tool Usage Information 

Bearing, Expander, and Expander Driver Information 

Fig. 449: J 33049 Camshaft Bearing Service Kit Components 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

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

  

z

The tool consists of a guide cone (1), driving washers (2 or 3), expander bearing drivers (4-8), driver bars 
(9 or 10), expander jaws (11), expander sleeve (12), expander cone (13), expander shaft (14), and 
expander assembly (15).  

z

Expander bearing driver number one inside diameter is 28.575-37.465 mm (1.125-1.475 in) and is used 
with the expander assembly and the small washer.  

z

Expander bearing driver number two inside diameter is 37.465-43.18 mm (1.475-1.7 in) and is used with 
number one expanding driver and the small washer.  

z

Expander bearing driver number three inside diameter is 43.18-48.895 mm (1.7-1.925 in) and is used with 
number two expanding driver and the large washer.  

z

Expander bearing driver number four inside diameter is 48.895-54.61 mm (1.925-2.15 in) and is used 
with number three expanding driver and the large washer.  

z

Expander bearing driver number five inside diameter is 54.61-60.325 mm (2.150-2.375 in) and is used 
with number four expanding driver and the large washer.  

z

Expander bearing driver number six inside diameter is 60.325-68.326 mm (2.375-2.69 in) and is used 
with number five expanding driver and the large washer.  

Tool Assembly and Operation 

1. Select the proper expanding driver and washer from the expanding driver and washer information. 

2. Place the expanding driver onto the expander assembly.  

3. Check to insure that the separation lines between the segments of the expanding driver align with the 

separation lines of the expander assembly.  

4. Place the guide cone over the driving bar, with the small end of the cone facing the driver assembly.  

5. Place the driving washer over the threaded portion of the expander assembly.  

6. Screw the expander assembly, with driving washer, onto the driving bar. 

It may be necessary to install the driver bar extension for removal of the inner bearings. 

IMPORTANT: To install or remove the expanding driver, always push on or pull from the 

ends. 
Pressure on the outside diameter may cause a bind against the rubber 
expanding sleeve.

 

2004 Hummer H2 

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

  

Fig. 450: Inserting J 33049 Tool & Nylon Cone 
Courtesy of GENERAL MOTORS CORP. 

7. Insert the tool into a inner camshaft bearing and tighten until snug. 

Operate the tool from the front or rear of the engine block. 

On some engine blocks the nut on the expander assembly is inaccessible except from either end. In this 
case you must use a socket and extension to enlarge and reduce the expander assembly. 

8. Slide the nylon cone into the front or rear camshaft bearing. This will properly align the tool.  

9. Drive the bearing out of or into the engine block. 

 

2004 Hummer H2 

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