Hyundai Seasall S220P, Workshop Manual

Page: 47 / 150

Engine Mechanical System
46
Cylinder block
8. Select the piston related to cylinder bore class.
Piston-to-cylinder clearance:
0.064 ~ 0.084mm (0.0025 ~ 0.0033in)
Cylinder Boring
1. Oversize pistons should be selected according to
the largest cylinder bore.
✍
NOTICE
The size mark of piston is stamped on the top surface
of the piston.
2. Measure the outer diameter of the piston to be
used. The standard measurement of the piston outer
diameter is taken 10mm (0.39in) height from bottom
land of the piston.
3. According to the measured outer diameter,
calculate the new bore size.
New bore size = piston O.D + 0.064 ~ 0.084mm
(0.0025~ 0.0033in) (clearance between piston and
cylinder) - 0.01mm (0.0004in) (honing margin.)
4. Bore each of the cylinders to the calculated size.
◉
CAUTION
To prevent distortion that may result from temperature
rise during honing, bore the cylinder holes in the firing
order.
5. Hone the cylinders, finishing them to the proper
dimension (piston outside di gap with
cylinder).
6. Check the clearance between the piston and
cylinder
Piston-to-cylinder clearance:
0.064 ~ 0.084mm (0.0025 ~ 0.0033in)
✍
NOTICE
When boring the cylinders, finish all of the cylinders to
the same oversize. Do not bore only one cylinder to
the oversize.
Piston and Piston Ring
1. Clean the piston.
1) Using a gasket scraper, remove carbon from the
piston top.
2) Using a groove cleaning tool or a broken ring,
clean the piston ring grooves.
3) Using a brush with solvent, thoroughly clean the
piston.
✍
NOTICE
Do not use a wire brush.
2. The standard measurement of the piston outer
diameter is taken 10mm (0.39in) height from bottom
land of the piston.
Standard diameter:
83.926 ~ 83.956mm (3.3042 ~ 3.3053in)
3. Calculate the difference between the cylinders bore
inner diameter and the piston outer diameter.
Piston-to-cylinder clearance:
0.064 ~ 0.084mm (0.0025 ~ 0.0033in)