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Home >> Kia >> 2007 >> Sorento Base, A5SR2 >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Engine Mechanical >> Engine Block >> Inspection >> Cylinder Block

Cylinder Block

  1. Remove gasket material.

    Using a gasket scraper, remove all the gasket material from the top surface of the cylinder block.

  2. Clean cylinder block

    Using a soft brush and solvent, thoroughly clean the cylinder block.

  3. Inspect top surface of cylinder block for flatness.

    Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head gasket for warpage.

    Flatness of cylinder block gasket surface

    Standard: Less than 0.05 mm (0.0020 in.), Less than 0.02 mm (0.0008 in.) / 150 x 150

    Fig 1: Measuring Surface Contacting Cylinder Head Gasket
    G04883078Courtesy of KIA MOTORS AMERICA, INC.
  4. Inspect cylinder bore diameter

    Visually check the cylinder for vertical scratches. If deep scratches are present, replace the cylinder block.

  5. Inspect cylinder bore diameter

    Using a cylinder bore gauge, measure the cylinder bore diameter at position in the thrust and axial directions.

    Standard diameter 

    92.00-92.03 mm (3.6220-3.6232 in) - 3.3L engine

    96.00-96.03 mm (3.7795-3.7807 in) - 3.8L engine

    Fig 2: Measuring Cylinder Bore Diameter At Position In Thrust And Axial Directions
    G04803719Courtesy of KIA MOTORS AMERICA, INC.
  6. Check the cylinder bore size code on the cylinder block.
    Fig 3: Checking Cylinder Bore Size Code On Cylinder Block
    G04883080Courtesy of KIA MOTORS AMERICA, INC.
    CYLINDER BORE INNER DIAMETER SPECIFICATION

    Class Size code Cylinder bore inner diameter
    3.3L 3.8L
    A A 92.00-92.01 mm (3.6220-3.6224 in) 96.00-96.01 mm (3.7795-3.7799 in)
    B B 92.01-92.02 mm (3.6224-3.6228 in) 96.01-96.02 mm (3.7799-3.7803 in)
    C C 92.02-92.03 mm (3.6228-3.6232 in) 96.02-96.03 mm (3.7803-3.7807 in)
  7. Check the piston size code (A) and the front mark (B) on the piston top face.
    Fig 4: Checking Piston Size Code And Front Mark On Piston Top Face
    G05118049Courtesy of KIA MOTORS AMERICA, INC.
    PISTON OUTER DIAMETER SPECIFICATION

    Class Size code Piston outer diameter
    3.3L 3.8L
    A A 91.96-91.97 mm (3.6205-3.6209 in.) 95.96-95.97 mm (3.7779-3.7783 in)
    B B 91.97-91.98 mm (3.6209-3.6213 in.) 95.97-95.98 mm (3.7783-3.7787 in)
    C C 91.98-91.99 mm (3.6213-3.6219 in.) 95.98-95.99 mm (3.7787-3.7791 in)
  8. Select the piston related to cylinder bore class.

    Clearance: 

    0.03-0.05 mm (0.0012-0.0020 in)

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