Suzuki WagonR+ RB310 Service Manual page 2535

6A1-60 ENGINE MECHANICAL
Front mark
(Punch mark or arrow mark)
Circlip 2
or
The oil hole should
come on intake side
c) Stamped number on piston and that on cylinder block should
1) Install piston pin to piston (1) and connecting rod (2):
Crankshaft pulley side
2) Install piston rings to piston:
3) After installing three rings (1st, 2nd and oil rings), distribute their
1. Front mark
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
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.
Piston
Number
at the
Outer diameter
top
(mark)
73.98 – 73 .99
1
(2.9126 – 2.9130)
73.97 – 73.98
2
(2.9122 – 2.9126)
Also, a letter A, B or C is stamped on piston head but ordinarily
it is not necessary to discriminate each piston by this letter.
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.
D As indicated in figure at the left, 1st (1) and 2nd rings (2) have
"RN" or "R" mark respectively. When installing these piston
rings to piston, direct marked side of each ring toward top of
piston.
D 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.
D When installing oil ring (3), install spacer first and then two
rails.
end gaps as shown in figure.
Cylinder
Number
Bore diameter
(mark)
74.01 – 74.02
1
(2.9138 – 2.9141)
74.00 – 74.01
2
(2.9134 – 2.9138)
Unit: mm (in.)
Piston-to-
cylinder
clearance
0.02 – 0.04
(0.0008 – (0 0008
0.0015)