Hummer H3. Manual — part 547

Fig. 208: Locating Oil Pump Bolts
Courtesy of GENERAL MOTORS CORP.

1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install

the oil pump.

2. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of

the engine block.

3. Install the oil pump bolts.

NOTE:

Refer to Fastener Notice .

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Tighten: Tighten the bolts to 25 N.m (18 lb ft).

Fig. 209: View Of Crankshaft Oil Deflector & Nuts
Courtesy of GENERAL MOTORS CORP.

4. Install the crankshaft oil deflector and nuts until snug.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 210: View Of Oil Pump, Screen & Components
Courtesy of GENERAL MOTORS CORP.

5. Lubricate a NEW oil pump screen O-ring seal with clean engine oil.

6. Install the NEW O-ring seal onto the oil pump screen.

7. Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.

8. Install the oil pump screen.

IMPORTANT: Push the oil pump screen tube completely into the oil pump

prior to tightening the bolt. Do not allow the bolt to pull the
tube into the pump.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

9. Install the oil pump screen bolt and nuts.

Tighten:

Tighten the bolt to 12 N.m (106 lb in).

Tighten the nuts to 25 N.m (18 lb ft).

10. Install the engine front cover. Refer to Engine Front Cover Replacement.

11. Install the oil pan. Refer to Oil Pan Replacement.

TIMING CHAIN AND SPROCKET REPLACEMENT

Tools Required

J 8433-1 Puller Bar

J 41478 Crankshaft Front Oil Seal Installer. See Special Tools.

J 41558 Crankshaft Sprocket Remover. See Special Tools.

J 41665 Crankshaft Balancer and Sprocket Installer. See Special Tools.

J 41816-2 Crankshaft End Protector

Removal Procedure

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3