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.

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

   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: Locating Piston Size Code & Front Mark On Piston Top Face

Courtesy of KIA MOTORS AMERICA, INC.

Identification of Piston Outer Diameter