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Home >> Chevrolet >> 2015 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 1.2L >> Diagnostic Information and Procedures >> Engine Compression Test >> Measurement Procedure

Measurement Procedure

  1. Install the suitable engine compression test tool to the spark plug hole.
    Fig 1: Engine Compression Test Tool
    GM2308858Courtesy of GENERAL MOTORS COMPANY
  2. Start the engine (approximately 4 seconds).
  3. Compare the compression values.
  4. Maximum pressure differential is 100 kPa (14.5 psi).
    NOTE: Engine revs at least 300/min.
  5. Check compression for all cylinders.
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