Repair Procedures: Inspection: Piston

1. Using a gasket scraper, remove the carbon from the piston top.
2. Using a groove cleaning tool, clean the piston ring grooves.
3. Using solvent and a brush, thoroughly clean the piston.
   NOTE: Do not use a wire brush.

Clearance  :

0.04 - 0.06 mm (0.0016 - 0.0024 in.)

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

   Standard diameter  :

   92.00 - 92.03 mm (3.6220 - 3.6232 in.)

   Fig 1: Measuring Cylinder Bore Diameter

   Courtesy of KIA MOTORS AMERICA, INC.
2. Measure the piston outside diameter at 14 mm (0.55118 in.) from bottom land of the piston.

   Standard diameter  :

   91.95 - 91.98 mm (3.6201 - 3.6213 in.)

Fig 2: Measuring Piston Outside Diameter

Courtesy of KIA MOTORS AMERICA, INC.

Clearance  :

0.04 - 0.05 mm (0.0016 - 0.0020 in.)

1. Check the cylinder bore size code on the cylinder block.
   Fig 3: Checking Cylinder Bore Size Code On Cylinder Block

   Courtesy of KIA MOTORS AMERICA, INC.
   IDENTIFICATION OF CYLINDER BORE
   
   

   Class	Size code	Cylinder bore inner diameter
   A	A	92.00 - 92.01 mm (3.6220 - 3.6224 in.)
   B	B	92.01 - 92.02 mm (3.6224 - 3.6228 in.)
   C	C	92.02 - 92.03 mm (3.6228 - 3.6232 in.)

2. Check the piston size code (A) and the front mark (B) on the piston top face.
   Fig 4: Locating Piston Size Code

   Courtesy of KIA MOTORS AMERICA, INC.
   IDENTIFICATION OF PISTON OUTER DIAMETER
   
   

   Class	Size code	Piston outer diameter
   A	A	91.95 - 91.96 mm (3.6201 - 3.6205 in.)
   B	B	91.96 - 91.97 mm (3.6205 - 3.6209 in.)
   C	C	91.97 - 91.98 mm (3.6209 - 3.6213 in.)