Hummer H3. Manual — part 413

Fig. 480: View Of Valve Stem Seals
Courtesy of GENERAL MOTORS CORP.

7. Use J 38820 to install the valve seals. See Special Tools. There is only one size valve seal.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 481: View Of Valves
Courtesy of GENERAL MOTORS CORP.

8. Install the valves. 0.075 mm (0.003 in) oversized valves are available if the valve guides

needed to be reamed. Use the same (original size) valve seal.

IMPORTANT: Lubricate the valve stems with clean engine oil before

installing.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 482: View Of Valve Springs & Retainers
Courtesy of GENERAL MOTORS CORP.

9. Install the valve spring and the valve spring retainer.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 483: Using J 8062 & J 42037 To Compress Valve Spring
Courtesy of GENERAL MOTORS CORP.

10. Use J 8062 (2) and EN 46119 (1) to compress the valve spring. See Special Tools.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3