Hummer H3. Manual — part 322

Fig. 149: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.

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

Fig. 150: View Of J 44217 & EN-44217-45 At Timing Chains
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Camshaft Holding Tool Caution .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

6. Complete the following in order to install the J-44217-45 (1). See Special Tools.

1. Install the hook portion of the timing chain retention tools into one of the timing chain

links near the timing chain shoe on both sides of the engine.

2. Tighten the wingnuts.

3. Ensure the hooks are still in one of the links and the gage blocks of the tool are firmly

in place on the edge of the head.

Fig. 151: View Of Intake Camshaft Sprocket Washer & Bolt
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

7. Remove and discard the intake camshaft sprocket bolt.

8. Remove the intake camshaft sprocket.

9. Clean and inspect the sprocket. Refer to Timing Chain and Sprockets Cleaning and

Inspection.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 152: Identifying Chain Alignment Links
Courtesy of GENERAL MOTORS CORP.

1. Install the intake camshaft sprocket into the timing chain.

Aligning the dark link (1) on the timing chain with the timing mark on the intake camshaft

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3