Flatness Of Cylinder Block Gasket Surface; Discrimination Of Cylinder Bore Size; Discrimination Of Piston Outer Diameter - Hyundai Seasall S250S Workshop Manual

Engine Mechanical System
Cylinder Block
1. Remove the gasket material. Using a gasket
scraper, remove all the gasket material from the top
surface of the cylinder block.
2. Clean the cylinder block Using a soft brush and
solvent, thoroughly clean the cylinder block.
3. Inspect the top surface of cylinder block for flatness.
Using a precision straight edge and feeler gauge
measure the surface contacting the cylinder head
gasket for war page.

Flatness of cylinder block gasket surface

Less than 0.05mm (0.0020in)
Less than 0.042mm (0.0017in) for width
Less than 0.096mm (0.0038in) for length
Less than 0.012mm (0.0005in) for 50mm × 50mm
4. Inspect the cylinder bore. Visually check the
cylinder for vertical scratch. If deep scratch is present,
replace the cylinder block.
5. Inspect the cylinder bore diameter. Using a cylinder
bore gauge, measure the cylinder bore diameter at
position in a thrust and an axial direction.
Standard diameter:
84.000 ~ 84.030mm (3.3071 ~ 3.3083in)
45
6. Check the cylinder bore size code on the cylinder
block side face.

Discrimination Of Cylinder Bore Size

7. Check the piston size mark(A) on the piston top
face.

Discrimination Of Piston Outer Diameter

Cylinder block