Hummer H3. Manual — part 297

Fig. 60: View Of Wiring Harness Retainers
Courtesy of GENERAL MOTORS CORP.

13. Disconnect the following wiring harness retainers from the engine wiring harness bracket:

The battery cable

The engine (4, 6)

The MAP sensor (5)

14. Remove the remaining lower engine wiring harness bracket bolt. Remove the bracket from

the engine compartment through the wheelhouse opening.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 61: View Of Intake Manifold
Courtesy of GENERAL MOTORS CORP.

15. Remove the intake manifold bolts.

16. Lower the vehicle.

17. Remove the intake manifold from the cylinder head.

18. Remove and discard the seal from the intake manifold.

19. Mask off the open ports to the cylinder head, in order to prevent foreign objects from

entering the engine.

20. Clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and

Inspection.

Installation Procedure

1. Remove the masking from the cylinder head and ensure the sealing surface is clean and dry.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

2. Install a NEW seal into the intake manifold groove.

Fig. 62: View Of Intake Manifold
Courtesy of GENERAL MOTORS CORP.

3. Position the intake manifold to the cylinder head.

4. Raise and support the vehicle only high enough to access the following components through

the wheelhouse. Refer to Lifting and Jacking the Vehicle :

The intake manifold bolts

The engine wiring harness bracket bolts

The wiring harnesses

5. Install the intake manifold bolts.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Tighten: Tighten the bolts from the inside working outward to 10 N.m (89 lb in).

Fig. 63: View Of Engine Wiring Harness Bracket
Courtesy of GENERAL MOTORS CORP.

6. Position the engine wiring harness bracket to the engine and harnesses.

7. Install the engine wiring harness bracket bolts.

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3