Hummer H3. Manual — part 119

Fig. 132: View Of Exhaust Camshaft Position Actuator
Courtesy of GENERAL MOTORS CORP.

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

11. Remove the exhaust camshaft position actuator.

2006 Hummer H3

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

Fig. 133: 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

2006 Hummer H3

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

Fig. 134: Installing Timing Chain & Sprockets
Courtesy of GENERAL MOTORS CORP.

1. Install the crankshaft sprocket to the crankshaft snout.

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

IMPORTANT: Ensure the #1 piston is at TDC. The pin on the crankshaft for

the timing chain sprocket should be straight up.

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

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

3. Feed the timing chain down through the opening in the cylinder head.

4. Install the timing chain on the crankshaft sprocket.

Aligning the dark link (2) of the timing chain with the timing mark on to the crankshaft
sprocket.

5. Install the intake camshaft sprocket onto the intake camshaft.

IMPORTANT: Ensure the alignment pin is properly engaged with the

camshaft

2006 Hummer H3

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