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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 2.5L (LCV)) >> Repair Instructions >> Engine Block Cleaning and Inspection >> Measuring Cylinder Bore Diameter

Measuring Cylinder Bore Diameter

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  1. GM4972Courtesy of GENERAL MOTORS COMPANY

    Check the cylinder condition. Some light vertical marks may be visible on the cylinder wall. In these areas, check that the honing marks are still visible in this marked area. If they are, the cylinder surface has not been compromised and the engine block can be used.

  2. NOTE:

    A commercially available bore gauge with dial indicator graduations in ten thousandths inch (0.0001") is necessary for measuring engine specification range.

  3. Measure the cylinder bore diameter 35 mm (1.378 in) from the deck face using a commercially available bore gauge.
  4. Compare your results with the Engine Mechanical Specifications . If the cylinder diameter exceeds the specifications, replace the engine block.