KiSC issued 09, 2007 A
1-3 PISTON AND PISTON RINGS
A piston of special el
l i
ptic shape is designed
i
n consideration
of explosion heat. Fu rther more, to enha nce piston's strength ,
a rib is prov ided between the piston a nd the piston boss.
Th ree piston ri ngs a re provided; two com pression ri ngs a nd
one oi
l
ri ng. Al
l
of them have d iff erent f u nct ions a nd sha pes.
Be ca ref u
l
w hen reassem bl
i
ng.
(a)
Plated Keystone Ring
(b)
Undercut Ring
(c)
Coil Expander Ring
(d)
Taper and Inside Cut Ring
V1702-B Only
I
[
Engine Serial Number
:
37196
and beyond
,J
(e)
Valve Stem Seal
(f ) Valve Guide
(g)
Inlet Valve
(h)
Exhaust Valve
(i)
Carbon Scraper
17
(A)
Inlet and Exhaust Valve
(a)
(b)
(c)
------
1-4
INLET AND EXHAUST VALVES
Al
I
parts a re quenched a nd tempered to resist wear. Fo
enhanci ng the
f
ill
i
ng-u p of a ir
i
nto eng
i
ne, the
i
nl et va
l
ve
head is bigger the exha ust
(
h) one. To prevent the ca rbon
ad hesion on exha ust va
l
ve stem, a "carbon-scra per"
( i )
is
rov ided at the
l
ower pa rt of ex ha ust val ve g u ide.
(
d)
---
--«-!
(e)
--
( f )
(g)
(a)
Valve Cap
(b)
Valve Spring Retaine
0011 FO
9
(c)
Valve Spring Collet
(d)
Valve Spring
and Piston Rin
s
d
¢>
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