Hummer H2. Manual — part 1797

z

J 43690 Rod Bearing Checking Tool. See Special Tools and Equipment .

z

J 43690-100 Rod Bearing Checking Tool - Adapter Kit. See Special Tools and Equipment .

z

J 45059 Angle Meter. See Special Tools and Equipment .

Cleaning Procedure

Fig. 372: View Of Crankshaft
Courtesy of GENERAL MOTORS CORP.

1. Clean the crankshaft with solvent.

2. Thoroughly clean all oil passages and inspect for restrictions or burrs.

IMPORTANT: Use care when handling the crankshaft. Avoid damage to the bearing

surfaces or the lobes of the crankshaft position reluctor ring. Damage to
the teeth of the crankshaft position reluctor ring may effect On-Board
Diagnostics (OBD) II system performance.

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

3. Dry the crankshaft with compressed air.

Inspection Procedure

Fig. 373: View Of Crankshaft
Courtesy of GENERAL MOTORS CORP.

1. Perform a visual inspection of the crankshaft for damage.

2. Inspect the crankshaft position (CKP) reluctor ring lobes for damage.

IMPORTANT: The reluctor ring teeth should not have imperfections on the rising or

falling edges.
Imperfections of the reluctor ring teeth may effect OBD II system
performance.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 374: Crankshaft Inspection Areas
Courtesy of GENERAL MOTORS CORP.

3. Inspect the crankshaft journals for wear (1).

Journals should be smooth with no signs of scoring, wear, or damage.

4. Inspect the crankshaft journals for grooves or scoring (2).

5. Inspect the crankshaft journals for scratches or wear (3).

6. Inspect the crankshaft journals for pitting or imbedded bearing material (4).

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 375: Crankshaft Key, Keyway & Threaded Hole
Courtesy of GENERAL MOTORS CORP.

7. Inspect the crankshaft key (122), keyway (1), and threaded hole (2) for damage.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2