Hummer H3. Manual — part 304

Installation Procedure

Fig. 86: View Of Oil Level Indicator Tube
Courtesy of GENERAL MOTORS CORP.

1. Lightly lubricate the O-ring seal with clean engine oil.

2. Install the oil level indicator tube into the engine oil pan.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

3. Install the oil level indicator tube bolt.

Tighten: Tighten the bolt to 10 N.m (89 lb in).

4. Install the oil level indicator into the tube.

Fig. 87: View Of Fuel Hoses & Retainers
Courtesy of GENERAL MOTORS CORP.

5. Insert the fuel lines into the retainers at the oil level indicator bracket and intake manifold.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

CYLINDER HEAD REPLACEMENT

Tools Required

EN-48464 Lower Timing Gear Tensioner Holding Tool. See Special Tools.

EN 46547 Flywheel Holding Tool. See Special Tools.

J 44221 Camshaft Holding Tool. See Special Tools.

J 45059 Angle Meter. See Special Tools.

Removal Procedure

1. Bleed the fuel pressure. Refer to Fuel Pressure Relief (With CH 48027) or Fuel

Pressure Relief (Without CH 48027) .

2. Remove the air induction assembly from the vehicle. Refer to Air Cleaner Resonator and

Outlet Duct Replacement and Air Cleaner Assembly Replacement .

3. Remove the battery from the vehicle. Refer to Battery Replacement .

4. Disconnect the fuel/EVAP lines from the intake manifold and move aside. Includes fuel line

removal from fuel rail. Refer to Evaporative Emission Hoses/Pipes Replacement -
Engine .

5. Remove the bolt holding the oil indicator tube to the intake manifold and move the oil

indicator tube aside. Do not remove.

6. Lift the vehicle. Refer to Lifting and Jacking the Vehicle .

7. Remove the engine shield from the vehicle.

8. Remove the oil pan skid plate from the vehicle.

9. Remove the drive belt. Refer to Drive Belt Replacement (Without A/C) or Drive Belt

Replacement (With A/C).

10. Drain the engine oil.

11. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) or

Cooling System Draining and Filling (Vac-N-Fill) .

12. Remove the left front wheelhouse panel. Refer to Wheelhouse Panel Replacement

(Front) or Wheelhouse Panel Replacement (Rear) .

13. Remove the fir tree wiring harness connectors from the engine wring harness bracket from

the left front wheelhouse opening.

14. From the left front wheelhouse, remove the engine wiring harness bracket from the engine

and set aside.

15. Remove the intake manifold bolts from the wheelhouse access. The bolts stay with intake

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

manifold. Refer to Intake Manifold Replacement.

16. Lower the vehicle.

Fig. 88: View Of Crankcase Ventilation System
Courtesy of GENERAL MOTORS CORP.

17. Remove the positive crankcase ventilation (PCV) pipes (2, 6) from the cam cover and

remove the intake manifold from the vehicle.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3