Hummer H3. Manual — part 122

Fig. 141: 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

Fig. 142: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.

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

CAUTION: Refer to Camshaft Holding Tool Caution in Cautions and

Notices.

2006 Hummer H3

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

Fig. 143: View Of Timing Chain Marked Links
Courtesy of GENERAL MOTORS CORP.

5. Using the timing marks on the following as a reference, make a mark on the timing chain

links (1) adjacent to them:

2006 Hummer H3

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

The exhaust camshaft position actuator sprocket

The Intake camshaft sprocket

The crankshaft sprocket

Fig. 144: Releasing Tension On Timing Chain
Courtesy of GENERAL MOTORS CORP.

6. Release the tension on the timing chain by moving the tensioner shoe in.

2006 Hummer H3

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