Bentley R Type - Engine Thermostat and Thermometer; Frost

26
TnB
'R'
TYpB
BBNToY
A
press
button
switch
is also
available
for
ascertaining
the engine
oil
level
which
reads on
the
fuel
gauge.
(See Fig.
1.)
These
are all controlled
by the
master
switch,
and
it is
recommended
that
the
master
switch
be
regularly
used
to avoid
leaving
the
car
with
one
of
the
accessories
in operation.
Engine
Thermostat
and
Thermometen.
A
thermostat
is
provided
in
the
upper
radiator
coolant
Pipe
which
automatically
restri6ts
the
flow through
the
radiator,
until
the
coolant
in the
system
attains
a temperature
of
about
78"
C.
A
thermometer
is provided
on
the
instrument
board to
indicate
.
that
the thermostat
is operating
properly
and that
there
is
no
shortage
of
coolant.
Goolant
Level
in
Radiator.
The
radiator
filler cap,
which
is located
beneath
the
bonnet
on the
left-hand
side,
should
de
removed
occasionally
for
inspection
of
the
coolant
level,
but
it nrust
not
be remoued
when the
engine
is
running.
The
level of
the
coolant
should
be
maintained
to the
bottom edge
of
the
filling
orifice.
Top
up
if necessary
with
the
correct
anti-freeze
mixture.
(See
page 82.)
Frost.
The
car
is delivered
with
a
suitable
anti-freeze
mixture
in the
cooling
system.
(See
page
79.)
If
the
original
coolant
has
been
replaced
with
water,
and the car
has to
stand
dxposed
to
frost with
the
engine
not_
running,
it is of
vital
importance
thal
the
system
should
be
drain"9.
by opening
the
drain
tafs
on the
water
pump
inlet
pipe, and on
the
cylinder.block
(1,
Tig.99),
arid,
releasing
the
file?
cap.
-The
car
heater
m.ust
also
be
drained
by
opening
the tap on
the
return
PiPe.
Before
attempting
to
start,
or
eaen
rnoae
th,e
engine
again,
hot
water
should
first be
foured
over the
water
Pump,
as otherwise
damage.ryly
be
caused
to
the
pump
rotor
by the
plesence
of
particles
of
ice
within
the
casing.
Warm
wdter
can
be used
with
advantage
for
refilling
the
radiator.
Fitting
of Snow
Chains.
In the
event
of snow
chains
being
necessary,
they
should
be
fitted
to the
rear wheels
only.
A farsons
chain,
known
as the
"special Bentley
Type",
is avail-
able. It
is
recommended
that
these
be
obtained
through
Messrs.
Bentley
Motors
(rggr)
Ltd.,
or
one
of
their
"Special
Retailers",
in
order
to ensure
the
supply
of
the
correct
type.
When
fitting
these
special
chains,
it
is essential
to
commence_by
fastening the
oie
hook
5n
the
inside
of
the wheel
and
to
ensure
that
the
outir
joining
links
are
fitted
as low
down
on.
the
tyre
wall as
possible.
ihe
t6ttsioning
springs
which
are
supPlied
to
go
on the
outside
of the
wheel
must
always
be
fitted.