Hummer H3. Manual — part 509

Fig. 72: Fuel Rail Bolts
Courtesy of GENERAL MOTORS CORP.

3. Install NEW fuel injector lower O-ring seals onto the injectors.

4. Lubricate the NEW O-ring seals with clean engine oil.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

5. Install the fuel rail.

6. Install the fuel rail bolts.

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

Fig. 73: Throttle Body Bolts/Nuts
Courtesy of GENERAL MOTORS CORP.

7. Install a NEW throttle body gasket to the intake manifold.

8. Install the throttle body.

9. Install the throttle body bolts/nuts.

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

IMPORTANT: Push down firmly on both sides of the rail until all the

injectors have been seated into their bores.

NOTE:

Refer to Fastener Notice .

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 74: View Of EVAP Tube & Purge Solenoid
Courtesy of GENERAL MOTORS CORP.

10. Install the EVAP tube and purge solenoid.

11. Install the EVAP canister purge solenoid to the fuel rail bracket and engage the retainer.

12. Connect the EVAP tube quick connect fitting at the intake manifold. Refer to Plastic

Collar Quick Connect Fitting Service .

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 75: Manifold Absolute Pressure (MAP) Sensor Retainer
Courtesy of GENERAL MOTORS CORP.

13. Lubricate the MAP sensor seal with clean engine oil.

14. Install the MAP sensor.

15. Install the MAP sensor retainer.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3