Hummer H3. Manual — part 253

Fig. 625: View Of Spacer Bolt
Courtesy of GENERAL MOTORS CORP.

2. Install J 44219 . See Special Tools.

3. Remove 2 bolts from the engine front cover in the location of the alignment pins.

4. Apply a 3 mm (0.12 in) bead of sealer GM P/N 12378521 (Canadian P/N 88901148) to the

block sealing surface (1).

IMPORTANT: The engine front cover must be installed within 10 minutes

from when the sealer was applied.

2006 Hummer H3

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

Fig. 626: Sealant Application To Block Sealing Surface
Courtesy of GENERAL MOTORS CORP.

5. Align the oil pump to the crankshaft sprocket splines.

6. Install the engine front cover and bolts.

7. Remove J 44219 . See Special Tools.

2006 Hummer H3

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

8. Install the 2 remaining engine front cover bolts.

Tighten:

1. Tighten the engine front cover bolts to 10 N.m (89 lb in).

2. Tighten the small center bolt (1) last to 8 N.m (71 lb in).

Fig. 627: Engine Front Cover
Courtesy of GENERAL MOTORS CORP.

CRANKSHAFT FRONT OIL SEAL INSTALLATION

2006 Hummer H3

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

Tools Required

J 45951 Front Seal Installer. See Special Tools.

Fig. 628: Installing Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS CORP.

1. Apply engine oil to the outside diameter of the crankshaft front oil seal.

2. Use J 45951 to install a new crankshaft front oil seal. See Special Tools.

2006 Hummer H3

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