Hummer H3. Manual — part 414

Fig. 484: View Of Valve Locks
Courtesy of GENERAL MOTORS CORP.

11. Install the valve keys.

12. Remove J 8062 and EN 46119 . See Special Tools.

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 485: Installing Spark Plugs
Courtesy of GENERAL MOTORS CORP.

14. 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.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 486: View Of A.I.R. Injection Pipe Cover
Courtesy of GENERAL MOTORS CORP.

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

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

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

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

CAMSHAFT COVER CLEANING AND INSPECTION

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 487: View Of Camshaft Cover
Courtesy of GENERAL MOTORS CORP.

1. Remove and discard the rubber ignition coil seals and the camshaft cover seal.

2. Clean the camshaft cover with a suitable cleaning solvent.

3. Inspect the camshaft cover for cracks or damage.

4. Inspect the bolt threads for damage.

5. Replace the camshaft cover if necessary.

OIL PUMP CLEANING AND INSPECTION

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3