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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 754 (ENGINE BLOCK)MAIN BEARING SELECTION
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

Main Bearing Selection

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Main Bearing Selection
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

Crankshaft Bore Code Location 

  1. Letters have been stamped on the end of the engine block as a code for the size of each of the five main journal bores. Write down the crank bore codes.

    If you can't read the codes because of accumulated dirt and oil, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.

    Fig 1: Identifying Crankshaft Bore Code Location
    G06428968Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Main Journal Code Location 

  2. The main journal codes are stamped on the crankshaft.
    Fig 2: Identifying Main Journal Code Location
    G06428969Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Use the crank bore codes and the crank journal codes to select the appropriate replacement bearings from the following table.
    NOTE: Color code is on the edge of the bearing.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.