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: 

0.03 ~ 0.05 mm (0.0012 ~ 0.0020 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 In Direction Of Thrust And Axial Using Cylinder Bore Gauge

   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: 

   91.96 ~ 91.99 mm (3.6204 ~ 3.6216 in.)

Fig 2: Measuring Piston Outside Diameter

Courtesy of KIA MOTORS AMERICA, INC.

Clearance: 

0.03 ~ 0.05 mm (0.0012 ~ 0.0020 in.)

1. Check the cylinder bore size code on the cylinder block.
   Fig 3: 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: Piston Size Code And Front Mark On Piston Top Face

Courtesy of KIA MOTORS AMERICA, INC.