Suzuki GA413, Service Manual

Page: 361 / 1246

c) Stamped number on piston and that on cylinder block should
correspond. That is, install number 2 stamped piston to cylinder
which is identified with number 2 and a number 1 piston to cylin-
der with number 1.
Also, a letter A, B or C might be stamped on piston head but ordi-
narily it is not necessary to discriminate each piston by this let-
ter.
1) Install piston pin to piston and connecting rod:
After applying engine oil to piston pin and piston pin holes in pis-
ton and connecting rod, fit connecting rod to piston as shown in
figure and insert piston pin to piston and connecting rod, and
install piston pin circlips.
NOTE:
Circlip should be installed with its cut part facing either up
or down as shown in figure.
1. Piston
2. Match mark (O or
)
3. Connecting rod
4. Oil hole
The oil hole should
come on intake side
2) Install piston rings to piston:
As indicated in figure at the left, 1st and 2nd rings have “RN”,
“T” or “R” mark respectively. When installing these piston
rings to piston, direct marked side of each ring toward top of
piston.
1st ring differs from 2nd ring in thickness, shape and color of
surface contacting cylinder wall.
Distinguish 1st ring from 2nd ring by referring to figure.
When installing oil ring, install spacer first and then two rails.
1. 1st ring
2. 2nd ring
3. Oil ring
3) After installing three rings (1st, 2nd and oil rings), distribute their
end gaps as shown in figure.
1. Match mark (O or )
2. 1st ring end gap
3. 2nd ring end gap and
oil ring spacer gap
4. Oil ring upper rail gap
5. Oil ring lower rail gap
6. Intake side
7. Exhaust side
ENGINE MECHANICAL 6A-55
Piston Cylinder
Number
at the top
(mark)
Outer diameter
Number
(mark)
Bore diameter
Piston-to-cylinder
clearance
1
73.98 – 73.99 mm
(2.9126 – 2.9130 in.)
1
74.01 – 74.02 mm
(2.9138 – 2.9141 in.)
0.02 – 0.04 mm
(0.0008 – 0.0015
in.)
2
73.97 – 73.98 mm
(2.9122 – 2.9126 in.)
2
74.00 – 74.01 mm
(2.9134 – 2.9138 in.)
0.02 – 0.04 mm
(0.0008 – 0.0015
in.)