THERMOSTAT
REMOVAL
• Remove
the
seat and fuel tank. (Refer
to
page 2-4.)
• Drain
the
coolant.
• Remove
the
water hose and
thermostat
cover
CD.
INSPECTION
Inspect
the
thermostat
pellet for signs of cracking.
Test
the
thermostat
at
the
bench for control action,
in
the
following manner:
•
Pass
a string between flange, as shown
in
the
figure.
• Immerse
the
thermostat
in
the
water contained
in
the
jar, as
shown
in
the
figure. Note
that
the
immersed
thermostat
is
in
suspension. Heat
the
water by placing
the
jar
on
a stove
and observe
the
rising temperature on
the
thermometer.
• Read
the
thermometer just when
the
thermostat
drops
to
the
bottom
of
the
jar. This reading, which
is
the
temperature
level
at
which
the
thermostat valve begins
to
open, should
be anywhere between 48° and 52°
C.
Thermostat valve opening temperature:
50
± 2°C
• Keep
on
heating
the
water
to
raise its temperature
to
and
beyond 65°
C.
•
Just
when
the
water reaches 65°C,
the
thermostat valve
shou
Id
have lifted by
at
least 7.0 mm.
Thermostat valve lift: Over
7.0
mm
at
65°C
• A
thermostat
failing
to
satisfy either
of
the
two require-
ments (start-to-open temperature and valve lift) must be
replaced.
• Tighten
the
thermostat
cover bolts
to
the
specification.
COOLING
SYSTEM
5-4
I----®
CD
CD
Thermostat
® String
I.J----®
CD
Stove
® Thermometer
Valve lift
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