LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1255 (Engine Mechanical - 3.1L Unit Repair) >> Repair Instructions >> Crankshaft and Bearings Cleaning and Inspection >> Method A

Method A

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Do not mix inserts of different nominal size in the same bearing bore.
  1. Measure the crankshaft bearing journal diameter with a micrometer in several places, 90 degrees apart. Average the measurements.
  2. Measure the crankshaft bearing journal taper and runout.
    Fig 1: Measuring Crankshaft Bearing Journal
    G01702859Courtesy of GENERAL MOTORS CORP.
  3. Install the crankshaft bearing inserts. Tighten the bearing cap bolts to specification using J 36660-A  .
  4. Measure the connecting rod inside diameter in the same direction as the length of the rod with an inside micrometer.
  5. Measure the crankshaft main bearing inside diameter with an inside micrometer.
  6. Select a set of bearing inserts that will produce the desired clearance.
  7. If the specified clearances cannot be met, the crankshaft journals must be reconditioned and undersized bearing inserts installed.
scientia non olet · About LEMON Manuals