Hummer H3. Manual — part 124

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

4. Remove the J 44221 from the camshafts. See Special Tools.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 150: View Of Timing Chain Marked Links
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Every 7th link of the timing chain is darkened to aid in

aligning the timing marks.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

5. Align the marked links (1) on the timing chain with the timing marks on the following:

The exhaust camshaft position actuator sprocket

The Intake camshaft sprocket

The crankshaft sprocket

6. Install the engine front cover. Refer to Engine Front Cover Replacement.

7. Install the camshaft cover. Refer to Camshaft Cover Replacement.

TIMING CHAIN TENSIONER SHOE REPLACEMENT

Tools Required

J 44221 Camshaft Holding Tool. See Special Tools.

Removal Procedure

1. Remove the camshaft cover. Refer to Camshaft Cover Replacement.

2. Remove the engine front cover. Refer to Engine Front Cover Replacement.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 151: View Of CMP Actuator
Courtesy of GENERAL MOTORS CORP.

3. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at

top dead center (TDC) on the compression stroke.

The word Delphi on the exhaust camshaft position actuator will be parallel with the cylinder
head to cam cover mating surface.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3