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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 1.2L (LIH)) >> Repair Instructions >> Crankshaft and Bearing Cleaning and Inspection >> Check Crankshaft Bearing Clearance (with Micrometer Gauge Internal Measuring Device)

Check Crankshaft Bearing Clearance (with Micrometer Gauge Internal Measuring Device)

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  1. GM2189634Courtesy of GENERAL MOTORS COMPANY

    Measure the crankshaft bearing journal diameter with a micrometer gauge at the measuring points (1, 3) and (2, 4).

  2. Calculate the average crankshaft bearing journal diameter. Formula: (1. result + 2. result) / 2.

    Refer to Engine Mechanical Specifications  for the recommended limits.

  3. NOTE:

    Different classes of bearing can be used for a crankshaft bearing to reduce bearing clearance. The stronger of the two bearings must be inserted in the crankshaft bearing cap.

  4. Crankshaft bearing clearance is calculated by using: