Hummer H2. Manual - part 1813

Fig. 432: View Of J 24086-920 & J 24086-10 
Courtesy of GENERAL MOTORS CORP. 

IMPORTANT:

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Disassembly of the piston, press-fit design piston pin, and 
connecting rod may create scoring or damage to the piston pin and 
piston pin bore. If the piston, pin, and connecting rod have been 
disassembled, replace the components as an assembly.  

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If reusing the piston and connecting rod assembly, install the 
assembly to the original cylinder and corresponding crankshaft 
journal.  

 

2004 Hummer H2 

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

  

1. Install fork insert J 24086-920 into J 24086-10 . See Special Tools and Equipment . 

Fig. 433: Connecting Rod Positioning Tab, Flat Flange & Mark On Top Of Piston 
Courtesy of GENERAL MOTORS CORP. 

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The assembly procedure, as shown, is to be used for diagnostic 
purposes only.  

CAUTION: Avoid contact with HOT components. Wear safety glasses and 

protective gloves to avoid personal injury.

NOTE:

Applying excessive heat to the connecting rod may damage or distort the 
rod. Rod temperature SHOULD NOT exceed 315°C (600°F). At this 

 

2004 Hummer H2 

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

  

2. Use a torch and apply MILD heat to the pin end of the connecting rod. Mild heating of the connecting rod 

will ease in piston and pin assembly.  

3. Identify the positioning tab (1) or flat flange (3) of the connecting rod. When properly assembled, the 

positioning tab or flat flange of the rod and the mark (2) on the top of the piston should both be facing the 
front of the engine. 

Fig. 434: Piston, Connecting Rod & J 24086-16A 
Courtesy of GENERAL MOTORS CORP. 

4. Assemble the piston, the connecting rod, and the J 24086-16A. 

temperature the end of the connecting rod will turn a straw color upon 
visual inspection.

 

2004 Hummer H2 

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

  

Fig. 435: Adjusting J 24086-9 To G-4 
Courtesy of GENERAL MOTORS CORP. 

5. Adjust the J 24086-9 to I 8. 

 

2004 Hummer H2 

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