Hummer H3. Manual — part 145

Fig. 222: View Of Engine Flywheel - Manual Transmission
Courtesy of GENERAL MOTORS CORP.

2. Remove and discard the flywheel bolts.

3. Remove the flywheel.

4. Clean and inspect the flywheel. Refer to Engine Flywheel Cleaning and Inspection

(Automatic Transmission) or Engine Flywheel Cleaning and Inspection (Manual
Transmission).

Installation Procedure

2006 Hummer H3

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

Fig. 223: View Of Engine Flywheel - Manual Transmission
Courtesy of GENERAL MOTORS CORP.

1. Position the flywheel to the crankshaft.

2. Install the NEW flywheel bolts.

Tighten: Tighten the bolts a first pass to 25 N.m (18 lb ft). Using the J 45059 rotate the
bolts a final pass an additional 50 degrees. See Special Tools.

3. Install the clutch assembly. Refer to Clutch Assembly Replacement in Clutch.

ENGINE REPLACEMENT

Tools Required

J 38185 Hose Clamp Pliers. See Special Tools.

J 44220 Engine Lift Bracket. See Special Tools.

Removal Procedure

1. Remove the hood. Refer to Hood Replacement .

2. Remove the battery box. Refer to Battery Box Replacement .

3. Drain the engine coolant. Refer to Draining and Filling Cooling System .

4. Remove the outlet radiator hose. Radiator Hose Replacement - Outlet .

5. Remove the cooling fan. Refer to Fan Replacement .

6. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine

Controls - 3.5L (L52).

7. Remove the air cleaner resonator and outlet duct. Refer to Air Cleaner Resonator and

Outlet Duct Replacement in Engine Controls - 3.5L (L52).

8. Remove the generator. Refer to Generator Replacement .

9. Reinstall the engine lift bracket. Refer to Engine Lift Bracket Replacement.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2006 Hummer H3

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

Fig. 224: View Of Radiator Inlet Hose
Courtesy of GENERAL MOTORS CORP.

10. Position the J 38185 to the clamp (3) in order to remove the radiator inlet hose (2) from the

water outlet housing (4). See Special Tools.

11. Remove the washer solvent container/coolant recovery reservoir mounting bolts ONLY, in

order to gain clearance to remove the engine wiring harness. Refer to Washer Solvent
Container Replacement .

2006 Hummer H3

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

Fig. 225: 2 Engine Wiring Harness Connectors At Powertrain Control Module
(PCM)
Courtesy of GENERAL MOTORS CORP.

12. Disconnect the 2 engine wiring harness connectors from the powertrain control module

(PCM).

13. Remove the engine wiring harness clips from the wheelhouse.

2006 Hummer H3

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