Hummer H3. Manual — part 455

11. Align the (dark) link of the timing chain with the timing mark on the exhaust camshaft

actuator (1).

12. Install the exhaust camshaft actuator onto the exhaust camshaft.

13. Install the new exhaust camshaft actuator bolt.

Tighten:

Tighten the exhaust camshaft actuator bolt the first pass to 25 N.m (18 lb ft).

Use J 45059 to tighten the exhaust camshaft actuator bolt the final pass an additional
135 degrees. See Special Tools.

14. Unlock the tensioner.

15. Remove J 44221 . See Special Tools.

IMPORTANT: It may be necessary to temporarily remove J 44221 to rotate

and hold the camshaft (hex) to align the pin to the camshaft
sprocket. See Special Tools.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 640: Identifying Chain Alignment Links
Courtesy of GENERAL MOTORS CORP.

16. The dark links (1) on the chain should be aligned with marks on sprockets as shown.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 641: View Of Exhaust Camshaft Sensor
Courtesy of GENERAL MOTORS CORP.

17. Lube the exhaust camshaft position sensor bore with clean engine oil.

18. Install and seat the exhaust camshaft position sensor.

19. Install the exhaust camshaft position sensor bolt.

Tighten: Tighten the exhaust camshaft position sensor bolt to 10 N.m (89 lb in).

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 642: View Of Intake Camshaft Sensor
Courtesy of GENERAL MOTORS CORP.

20. Lube the intake camshaft position sensor bore with clean engine oil.

21. Install and seat the intake camshaft position sensor.

22. Install the intake camshaft position sensor bolt.

Tighten: Tighten the intake camshaft position sensor bolt to 10 N.m (89 lb in).

CAMSHAFT COVER INSTALLATION

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3