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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 597 (Engine Mechanical - 4.0L (Unit Repair)) >> Repair Instructions >> Crankshaft and Bearings Cleaning and Inspection >> Visual Inspection

Visual Inspection

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the following visual inspections:
    • Inspect the crankshaft balancer bolt hole (1) for thread damage
    • Inspect the crankshaft balancer mounting area (2) for damage
    • Inspect the crankshaft sprocket pin hole (3) for damage
    • Inspect the crankshaft main journals (4) for damage
    • Inspect the crankshaft connecting rod journals (5) for damage
    • Inspect the crankshaft oil passages (6) for obstructions
    • Inspect the crankshaft main bearing thrust wall surfaces (7) for damage
    • Inspect the crankshaft reluctor ring teeth (8) for damage
    • Inspect the crankshaft counterweights (9) for damage
    • Inspect the crankshaft rear main oil seal surface (10) for damage
    • Inspect the crankshaft engine flywheel mounting surface (11) for damage
    • Inspect the crankshaft engine flywheel bolt holes (12) for thread damage
    • Inspect the crankshaft pilot hole (13) for damage
  2. Fig 1: Identifying Crankshaft Components
    G01815841Courtesy of GENERAL MOTORS CORP.
  3. Repair or replace the crankshaft as necessary.