Hyundai Seasall S250S Workshop Manual page 51

Engine Mechanical System
10. Install the piston rings.
1) No.1 and No.2 piston rings - assemble the rings
with the 'Y' marks on the edge of the rings facing the
cylinder head side. One end gap is placed at 180˚
opposite position with the other.
2) Oil ring - the end gap of the oil ring should be
located with 180˚ to that of coil spring and 90˚ to hat
of No.1 ring.
3) Check that the oil ring assembly (oil ring and coil
Spring) can be turned smoothly toward any (clockwise
or counter-clockwise) direction.
4) Position the piston rings so that the ring ends are
as shown below.
11. Assemble the piston and connecting rod.
1) Set the snap ring in one side of piston pin hole.
2) Apply sufficient engine oil or non-water-soluble
press oil to outer surface of the piston, inner surface
of piston pin hole and small end bore of the
connecting rod before inserting the piston pin.
3) Insert the piston pin into the piston pin hose and
the small end bore of connecting rod after setting the
piston front marks (A) and the RH/LH marks (B) of the
connecting rod facing to the timing chain.
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✍ NOTICE
Marking the parts at the '○' points in the picture above
makes the reassembly work much easier for its
direction.
4) Set the snap ring in the other side after inserting
the piston pin.
12. Install the connecting rod bearings.
1) Align the bearing claw with the groove of the
connecting rod cap.
13.Install the piston and connecting rod assembly.
✍ NOTICE
Before installing the piston, apply a coat of engine oil
to the ring grooves and cylinder bores.
Cylinder block