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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical - 1.8L (LUW And LWE)) >> Diagnostic Information and Procedures >> Cylinder Leakage Test >> Test Procedure

Test Procedure

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  1. Calibrate the pressure loss tester and connect to the compressed air system.
    NOTE: Follow manufacturer instructions.
  2. Install the pressure loss tester.
    Fig 1: View Of Pressure Loss Tester
    GM1937002Courtesy of GENERAL MOTORS COMPANY
    • Engage first gear and apply the parking brake.
      NOTE: Wheels must be in contact with the ground.
    • Install the connecting piece into the spark plug thread of cylinder number 1.
    • Apply compressed air to cylinder number 1.
  3. Inspect for Pressure Loss
    • Take pressure loss reading.
      • The maximum permissible pressure differential between cylinders is approximately 10 percent.
      • Maximum pressure loss of a cylinder is 25 percent.
    • Take note of any visible escape of compressed air.

      Intake manifold, exhaust manifold, crankcase

    • Take note of any bubble formation in the coolant compensation tank.
  4. Perform pressure loss test by analogy on cylinders 3, 4 and 2.
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