Engine Mechanical: 1D-46
Pistons, Piston Rings, Connecting Rods and
Cylinders Disassembly and Assembly
S7RS0B1406031
Disassembly
1) Using piston ring expander, remove two
compression rings (Top and 2nd) and oil ring from
piston.
2) Remove piston pin from connecting rod as follows.
a) Ease out piston pin circlip (1), as shown.
b) Force piston pin out.
Assembly
1) Decarbonize piston head and ring grooves using a
suitable tool.
2) Install piston pin to piston (1) and connecting rod (2):
a) After applying engine oil to piston pin and piston
pin holes in piston and connecting rod.
b) Fit connecting rod as shown in figure.
NOTE
Be sure to position front mark or arrow mark
(4) on piston and oil hole (5) of connecting
rod at specified position as shown in figure.
c) Insert piston pin to piston and connecting rod.
d) Install piston pin circlips (3).
NOTE
Circlip should be installed with its cut part
facing as shown in figure. Install so that
circlip end gap comes within such range as
indicated by arrow.
3) Install piston rings to piston:
• As indicated in the figure, 1st and 2nd rings have
discrimination mark (4) respectively. When
installing these piston rings to piston, direct
marked side of each ring toward top of piston.
• 1st ring (1) differs from 2nd ring (2) in thickness,
shape and color of surface contacting cylinder
wall.
Distinguish 1st ring from 2nd ring by referring to
the figure.
• When installing oil ring (3), install spacer first and
then two rails.
4) After installing three rings (1st, 2nd and oil rings),
distribute their end gaps as shown in figure.
I2RH0B140113-01
I2RH0B140114-01
1. 1st ring end gap 3. Oil ring upper rail gap
2. 2nd ring end gap and oil ring spacer gap 4. Oil ring lower rail gap
I6RS0C140022-01
I6RS0C140023-01
I6RS0B141018-01
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