KTM 690 Enduro R 2018, Repair Manual

Page: 177 / 311

17.4.24
Checking
valve
springs
305593-10
17.4.25
Checking
valve
spring
retainer
305594-10
17.4.26
Checking
the
cylinder
head
305595-10
305592-10
Check the valve
springs
for fractures and
wear
(visual check).
»
If the valve spring is fractured
or worn:
—
Change
thevalve
spring.
Measurethevalve
spring lengths.
Valve
spring
Minimum
length
(without
|
42.3
mm
(1.665in)
valve
spring cap)
»
If the measured value does not
equal
the
specified
value:
—
Change
the
valve
spring.
Check the valve spring retainer for fractures and
wear
(visual
check).
»
lf the valve
spring
retainer is
fractured
or worn:
—
Change
the valve
spring
retainer.
Measure the thicknessof the valve
spring
retainer.
2.4... 2.5
mm
(0.094 ...
0.098
in)
»
|f the measured value does not equal the
specified
value:
—
Change
the valve
spring
retainer.
Valve
spring
cap
-
thickness
Check valve
guides
ai
with the
special
tool.
[
Limit
plug
gauge
(59029026006)(—"
p.
285)
»
If the
special
tool
is easy to insert into the valve
guide:
—
Change
the valve
guide
and valve.
Check the sealing
area
of the spark plug thread and the valve
seats
for damage
and
cracking.
»
If there is
damage
or
cracking:
—
Change
the
cylinder head.
Check the
sealing
area
of the
cylinder
for distortion
using
a
straight edge
and the
special tool.
Feeler
gauge
(59029041100) ("—
p.
286)
|
Cylinder/cylinder
head
-
seal-
|
s
0.10
mm
(s
0.0039
in)
ing
area
distortion
»
If the measured value does
not
equal
the
specified
value:
—
Change
the
cylinder
head.
175