28
COOLING
SYSTEM
The cooling system
is
of
a pressurized
type
with a cross-
flow
radiator and expansion tank.
Until the engine has reached its operating temperature,
the radiator
inlet
is
closed by a thermostat and the c
ool-
ant circulates
through
the engine and the fresh
air
heater
until it reaches the temperature at
which
the thermostat
opens.
The radiator fan is
electrically operated and is regu-
lated
by a thermostatic switch. The fan
is
only
op
erative
when the temperature
of
the radiator
coolant
is
higher
than the cut-in temperature
of
the
thermostatic
switch.
The
c
oo
ling system must
not
be screened!
NOTE
Always loosen the cap
gently
and
allow
steam
to
escape
before taking the cap
off
. The
coolant
level in the expan-
sion tank should be between half and full (cold engine)
or
full (warm engine).
Checking the coolant level
Check regularly to make su
re
that the
coolant
is
up to
the recommended
leve
l.
When necessary, top up with
equal parts
of
clean water and coolant. (See Recommenda-
tions in Technical Data Section). After an
empty
ex-
pansion tank has been topped up, the engine should be
run
until warm and the tank topped up again.
CHANGING COOLANT
Draining
1.
Set the heater
control
to
maximum heat.
2.
Loosen the pressure cap on
the
expansion tank 3
(see illustration).
3
Open the radiator drain cock (13) which is located
towards the bottom
of
the radiator on the left-hand
side (see illustration).
4.
Open the engine drain
cock
(14) located to
the
left
of
the engine, under the exhaust manifold (see illus-
tration).
Filling
1.
Close the drain
cock
and ensure that the heater
con
-
trol
is
set
to
maximum heat.
2.
Fill the system with
coolant
until the expansion tank
is
filled Replace cap.
3.
Run the engine until warm, remove the pressure cap,
and top up the expansion tank.
4.
Swiech off the engine and check
coo
lant level in the
expansion tank.
The
expansion tank
should
be be-
tween half and full (cold engine)
or
fu ll (warm engine).
ANTI-FREEZE C
OOLANT
MIXTURES
Cars delivered from the factory are
fi
lied with anti-
freeze coolant mixtures year round.
During the
cold season the coolant must be mixed
with
anti-freeze,
as
pure water
is
liable to freeze and burst
the radiator and the
cylinder
block. Ethylene glycol is
recommended
as
an anti-freeze fluid. For
maximum
securi
ty
against freezing and rusting, the
glycol
dosage
should
be
4-5 US quarts (3.5 - 4.5 liters); i.e., 40 - 50%
Use
only
glycol
recommended. The anti-freeze can be
used
all year round but should be changed
once
a year.
If pure water
is
used
during
the
summer
season, a rust-
proof
ing agent should be added.
To Next Page
Loading...
