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Repair Procedures: Inspection: Piston: Notes

  1. Clean piston.
    1. Using a gasket scraper, remove the carbon from the piston top.
    2. Using a groove cleaning tool or broken ring, clean the piston ring grooves.
    3. Using solvent and a brush, thoroughly clean the piston.

      Information 

      Do not use a wire brush.

  2. Check the piston-to-cylinder clearance by calculating the difference between the cylinder bore inner diameter and the piston outer diameter.

    Piston-to-cylinder clearance: 

    0.02 - 0.04 mm (0.0008 - 0.0016 in.)

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

      Cylinder bore diameter: 

      81.00 - 81.03 mm (3.1890 - 3.1902 in.)

      G13306588Courtesy of KIA MOTORS AMERICA, INC.

      Information 

      Measure position points (from the top of the cylinder block): 30 mm (1.1811 in.)/60 mm (2.3622 in.)/90 mm (3.5433 in.)

    2. Measure the piston outside diameter at 35 mm (1.3780 in) from top land of the piston.

      Piston outside diameter  :

      80.97 - 81.00 mm (3.1878 - 3.1890 in.)

      G13306589Courtesy of KIA MOTORS AMERICA, INC.
  3. Select the piston matching with cylinder bore class.

    Piston-to-cylinder clearance: 

    0.02 - 0.04 mm (0.0008 - 0.0016 in.)

    1. Check the cylinder bore size code on the cylinder block side surface.
      G13306590Courtesy of KIA MOTORS AMERICA, INC.