Hummer H3. Manual — part 330

Fig. 177: Identifying Chain Alignment 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:

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

The exhaust camshaft position actuator sprocket

The Intake camshaft sprocket

The crankshaft sprocket

Fig. 178: Releasing Timing Chain Tension
Courtesy of GENERAL MOTORS CORP.

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 179: View Of Tee At Timing Chain Tensioner
Courtesy of GENERAL MOTORS CORP.

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 180: View Of Cylinder Head Access Hole Plugs
Courtesy of GENERAL MOTORS CORP.

8. Remove the cylinder head access hole plug.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3