Repair Procedures: Inspection: 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.

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.)

   Courtesy 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.)

   Courtesy of KIA MOTORS AMERICA, INC.

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.

   Courtesy of KIA MOTORS AMERICA, INC.

   Cylinder Bore Inner Diameter 

   Size Code	Cylinder Bore Inner Diameter
   A	81.00 - 81.01 mm (3.1890 - 3.1894 in.)
   B	81.01 - 81.02 mm (3.1894 - 3.1898 in.)
   C	81.02 - 81.03 mm (3.1898 - 3.1902 in.)

2. Check the piston size mark on the piston top face.

   Courtesy of KIA MOTORS AMERICA, INC.

   Piston Outer Diameter 

   Size Code	Piston Outer Diameter
   A	80.97 - 80.98 mm (3.1878 - 3.1882 in.)
   B	80.98 - 80.99 mm (3.1882 - 3.1886 in.)
   C	80.99 - 81.00 mm (3.1886 - 3.1890 in.)