Hummer H3. Manual — part 348

Fig. 242: View Of Engine Flywheel
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.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

3. Install the transmission. Refer to Transmission Replacement .

ENGINE REPLACEMENT

Tools Required

J 38185 Hose Clamp Pliers

J 44220 Engine Lift Bracket

Removal Procedure

1. Remove the hood. Refer to Hood Replacement .

2. Recover the A/C system. Refer to Refrigerant Recovery and Recharging .

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

Replacement (With A/C).

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

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

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

6. Remove the outlet radiator hose. Radiator Outlet Hose Replacement (LLR) .

7. Remove the radiator. Refer to Radiator Replacement .

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

9. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

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

Outlet Duct Replacement .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 243: View Of Radiator Inlet Hose
Courtesy of GENERAL MOTORS CORP.

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

water outlet housing (4).

12. 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 (Prior to VIN 78135604) or Washer Solvent Container
Replacement (Base) or Washer Solvent Container Replacement (Post VIN
78135604) .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 244: Locating PCM & Engine Wiring Harness PCM Connectors
Courtesy of GENERAL MOTORS CORP.

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

(PCM).

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3