Hummer H3. Manual — part 324

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7. Install the J 44221 to the rear of the camshafts. See Special Tools.

Fig. 156: Releasing Timing Chain Tension
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8. Release the tension on the timing chain by moving the tensioner shoe in.

CAUTION: Refer to Camshaft Holding Tool Caution .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 157: View Of Tee At Timing Chain Tensioner
Courtesy of GENERAL MOTORS CORP.

9. Place the tee into the tensioner to hold the shoe in place.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 158: Identifying Exhaust Camshaft Position Actuator Bolt
Courtesy of GENERAL MOTORS CORP.

10. Remove and discard the exhaust camshaft position actuator bolt.

11. Remove the exhaust camshaft position actuator.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 159: View Of Timing Chain & Sprockets
Courtesy of GENERAL MOTORS CORP.

12. Remove and discard the intake camshaft sprocket bolt.

13. Remove the intake camshaft sprocket.

14. Remove the timing chain.

15. Remove the crankshaft sprocket.

16. Clean and inspect the timing chain and sprockets. Refer to Timing Chain and Sprockets

Cleaning and Inspection.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3