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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Engine Overhaul - 2.4L) >> Crankshaft And Cylinder Block >> Inspection >> Cylinder Block

Cylinder Block

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  1. Visually check the cylinder block for scratch, rust and corrosion. Use a flaw detecting agent to check for cracks. If it is found faulty, repair or replace it.
  2. Measure distortion on the top surface of the cylinder block using a straight edge and thickness gauge.

    If distortion exceeds the limit, grind and repair it.

    A gasket or the like must not be adhered to the top surface of the cylinder block during measurement.

    Distortion on bottom 

    Standard value: Within 0.05 mm (0.0020 inch) 

    Limit: 0.02 mm (0.0008 inch) 

    Grinding limit: 0.2 mm (0.008 inch) 

  3. Check the cylinder wall for scratch or seizure. If there is any defect, replace the cylinder block.
    Fig 1: Measuring Cylinder Block Top Surface Distortion
    G09663615Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. Measure the bore and cylindricity of the cylinder using a cylinder gauge.

    If the cylinder is excessively worn, repair the cylinder and replace the piston and piston rings.

    Measuring points are as shown in the illustration.

    Standard value 

    Cylinder bore: 88.0 mm (3.46 inches) 

    Cylindricity: 0.15 mm (0.006 inch) 

    Fig 2: Measuring Cylinder Bore And Cylindricity Using Cylinder Gauge
    G09663616Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.