Cylinder Block: Notes

WARNING: This page is about a different variant/trim than selected.

Remove gasket material.
Using a gasket scraper, remove all the gasket material from the top surface of the cylinder block.
Clean cylinder block
Using a soft brush and solvent, thoroughly clean the cylinder block.
Inspect top surface of cylinder block for flatness.
Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head gasket for warpage.

Flatness of cylinder block gasket surface

Standard: Less than 0.03mm (0.0012 in.)

Limit: 0.05 mm ( 0.0020 in.)

Fig 1: Inspecting Top Surface Of Cylinder Block For Flatness
Courtesy of HYUNDAI MOTOR CO.
Inspect cylinder bore diameter
Visually check the cylinder for vertical scratch. If deep scratches are present, replace the cylinder liner.
Inspect cylinder bore diameter
Using a cylinder bore gauge, measure the cylinder bore diameter at position A, B and C in the thrust and axial directions.

Standard diameter

86.70 ~ 86.73mm (3.4134 ~ 3.4145in.)

Fig 2: Measuring Cylinder Bore Diameter Using Cylinder Bore Gauge
Courtesy of HYUNDAI MOTOR CO.

Check the cylinder bore size code (A) on the cylinder block bottom face.

Fig 3: Identifying Cylinder Bore Size Code

Courtesy of HYUNDAI MOTOR CO.

CYLINDER BORE INNER DIAMETER SPECIFICATIONS

Class	Cylinder bore inner diameter	Size code
A	86.70 ~ 86.71 mm (3.4133 ~ 3.4137in.)	A
B	86.71 ~ 86.72mm (3.4137 ~ 3.4141 in.)	B
C	86.72 ~ 86.73mm (3.4141 ~ 3.4145in.)	C

Check the piston size code (A) on the piston top face.

Fig 4: Identifying Piston Size Code

Courtesy of HYUNDAI MOTOR CO.

NOTE: Stamp the grade mark of basic diameter with rubber stamp.

PISTON DIAMETER SPECIFICATIONS

Select the piston related to cylinder bore class.
Clearance: 0.01 ~ 0.03mm (0.0004 ~ 0.0012in.)