Hummer H3. Manual — part 139

Fig. 200: View Of Crankshaft Rear Oil Seal Housing Sealant Application
Courtesy of GENERAL MOTORS CORP.

1. Apply a 3 mm (0.12 in) bead of sealer GM P/N 12378521 (Canadian P/N 88901148) (1) or

equivalent, to the following:

The crankshaft rear oil seal housing, were the housing meets the engine block

The surface of the crankshaft rear oil seal housing, were the housing meets the oil pan

The surface of the oil pan, were the oil pan meets the housing

IMPORTANT: The crankshaft rear oil seal housing must be installed within

10 minutes from when the sealer was applied.

2006 Hummer H3

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

Fig. 201: Crankshaft Rear Oil Seal Housing
Courtesy of GENERAL MOTORS CORP.

2. Complete the following to install the crankshaft rear oil seal housing:

1. Align the housing with the right alignment dowel, tilting the left side up slightly.

2. Align the housing with the left alignment dowel.

3. Press the housing against the engine block into place.

3. Install the crankshaft rear oil seal housing bolts.

4. Install the 2 oil pan bolts.

IMPORTANT: Tilting the crankshaft rear oil seal housing will allow sealer

between the housing and the oil pan.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2006 Hummer H3

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

Tighten:

Tighten the crankshaft rear oil seal housing bolts to 10 N.m (89 lb in).

Tighten the (end) oil pan bolts to 10 N.m (89 lb in).

5. Lightly lubricate the crankshaft rear oil seal lip with clean engine oil.

6. Position the plastic installation sleeve supplied with the new seal to the crankshaft.

Fig. 202: Installing Crankshaft Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.

7. Using the J 44215 with the J 8092 and a hammer, install the crankshaft rear oil seal into the

crankshaft rear oil seal housing.

2006 Hummer H3

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

The spring side of the seal goes toward the engine.

Ensure the seal is installed square.

The seal will bottom out in the housing when fully installed.

8. Install the flywheel. Refer to Engine Flywheel Replacement (w/Automatic

Transmission) or Engine Flywheel Replacement (w/Manual Transmission).

BALANCE SHAFT CHAIN TENSIONER REPLACEMENT

Removal Procedure

1. Remove the crankshaft rear oil seal housing. Refer to Crankshaft Rear Oil Seal and

Housing Replacement.

Fig. 203: View Of Sprocket Timing Marks

2006 Hummer H3

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