I,
e
e
p
a
.I
e
f
1-
J
f
j
s
e
y
e
Installation
To
install
the
thermostat,
first secure
the
thermostat
fitting by tightening its
mounting
bolts (2 pes) good and hard, and place
the
thermostat
in it,
as
shown.
Then
install
the
water
outlet
fitting with its arrow
mark
up
after
placing its gasket. Installing this fitting
the
other
way
round
will cause damage
to
the
thermostat.
Be
sure
to
apply Three-Bond
#4
to
the
nipple
when installing it
to
the
thermostat
fitting.
1
2
1-Water
outlet
fitting
2-Thermostat
3-Nipple
4-Thermostat
fitting
3
4
5-Water
bypass
hose
6-Thermo
switch
7-Water
pump
Installing
thermostat
Inspection
(I)
The
thermostat
valve remains seated
(closed) when
coolant
temperature
is
down.
The
temperature
at which
the
valve starts
unseating itself
is
specified; similarly, the
temperature at which
the
valve reaches its
full-open position
is
specified.
To
test the
thermostat
to see
if
it meets
these specifications,
the
thermostat
must
be
taken
down and placed in a pool
of
water, whose
temperature
can be raised
and lowered. Remember,
the
thermostat
is
insensitive
to
the
pressure
of
engine coolant.
A
thermostat
not
meeting
the
specifications
must
be replaced.
(2) When tested
as
above,
the
thermostat
valve
should remain seated tight at
the
ambient
ENGINE
temperature,
that
is, when
the
water
is
cold;
if
not,
it
means
that
the
wax-type
element is defective
or
has failed
to
require
replacement
of
the
thermostat
as
a whole.
Functional specifications
Item
Standard
Valve opening
82°C (180°F)
temperature
Valve full-open
95°C
temperature
(203°F)
[NOTE]
The
wax-pellet
type
thermostat
will
be
stuck
closed
if
its sensing
part
is
damaged, causing the engine
to
overheat.
COOLANT CHANGE
Soft
water
should be used in
the
cooling
system: hard water is likely
to
foul
up
the
water
side
of
the
system in a relatively
short
time
by
forming scales and sludges - substances
that
interfere with
smooth
conduction
of
heat
from
metal
to
the coolant. Even soft water,
if
used
too
long, becomes high in the
concentration
of
scale- and sludge-forming impurities.
Twice a year,
or
at
least once a year, clean
the
whole cooling system
by
vigorous flushing and
fill
up
the
system with a fresh
batch
of
coolant.
RUST INHIBITORS AND
ANTIFREEZE ADDITIVES
It
is
recommendable
that
a rust inhibitor, which
is
commercially available in
most
of
auto
supply
stores, should be added
to
the
coolant
in
order
to
retard the formation
of
rust and sludges in
the cooling system.
In
areas where
the
lowest
temperature
is
anticipated
to
be below
the
freezing
point,
an antifreeze
compound
should
be added
to
the coolant in an
proportion
appropriate for
the
lowest
expected
sub-zero
temperature.
2·47
To Next Page
Loading...
Need help?
General
