Hummer H3. Manual — part 209

Fig. 458: View Of Valve Keys
Courtesy of GENERAL MOTORS CORP.

11. Install the valve keys.

12. Remove J 8062 and J 42037 . See Special Tools.

2006 Hummer H3

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

Fig. 459: Measuring Valve Spring Installed Height
Courtesy of GENERAL MOTORS CORP.

13. Measure the valve installed height using a ruler. Measure from the base of the valve spring

to the top of the valve. Refer to Engine Mechanical Specifications.

14. Install the remaining valves, springs, and other components.

2006 Hummer H3

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

Fig. 460: Installing Spark Plugs
Courtesy of GENERAL MOTORS CORP.

15. Install the spark plugs.

Tighten: Tighten the spark plugs to 18 N.m (13 lb ft).

IMPORTANT: Do not try to centralize the electrode on the spark plug. The

electrode is offset by design.

2006 Hummer H3

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

Fig. 461: View Of A.I.R. Injection Pipe Cover
Courtesy of GENERAL MOTORS CORP.

16. Install the A.I.R. injection pipe gasket.

17. Install the A.I.R. injection pipe cover.

18. Install the A.I.R. injection pipe studs.

Tighten: Tighten the studs to 25 N.m (18 lb ft).

CAMSHAFT COVER CLEANING AND INSPECTION

2006 Hummer H3

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