HEATING
AND
VENTILATING
RUNNING
INSTRUCTIONS
HEATER
The heating
and
ventilating system is designed to pro vide fresh air either heated
by the engine cooling system or at outside temperature to the car at floor level
and for demisting and defrosting to the windscreen.
Air
Two doo rs, located one at each side of the gearbox tunnel, control distribution
distribution
of air between screen
and
car interior. To supply air to the car, open the
doors;
to boost the flow of air to the screen, close the doors.
Choice
of
fuel
Always use fuel with an octane rating best suited to your engine (see
'GENERAL
DATA').
Our
1972 Austin
and
MG engines ha ve not been designed to operate on lead-free
or clear gasolines and use of such fuels
cannot
be recommended as they could
have a detrimental effect on engine components, resulting in loss of perform-
ance, excess exhaust emissions and , possibly, complete engine failure.
Controls
Heater
(Fig ..1). A valve controlling the flow of coolant through the heater
unit
is fitted at the rear of the cylinder head. The valve is opened by turning it in
an
anti-clockwise direction when heating is required or shut off by turningclockwise
when the system is to be used for cool air ventilation.
Air flow (Fig. 2). The knob (1) operates a valve in the air intake
and
controls the
flow of air to the car interior.
Turn
the
knob
anti-clockwise from the
'OFF'
position to open the valve, the valve is fully open when the
knob
is turned to
the 'ON' position.
Booster. Press the lower end of the switch rocker (2) to boost the air flow.
Usage
By varying the settings of the air flow control, opening or closing the air distri-
bution doo rs,
and
utilizing the booster blower, a wide range of settings can be
obtained for heating, when the heater valve is open, or for ventilating when the
valve is shut, to suit prevailing conditions.
Starting
Check
that
the gear lever is in the neutral position.
If
the engine is cold , pull out the mixture control (choke). In extremely cold
'conditions it may be necessary to pull the control
out
to its fullest extent. Lock
the control in the desired position by turning the control
knob
clockwise.
Switch on the ignition, check
that
the ignition'warning light glows and
that
the
fuel gauge registers, then operate the starter.
NOTE.-After
switching the igni-
tion on, the fuel gauge needle moves slowly across the scale, taking some 30
seconds to reach the true reading. This slow reaction eliminates needle flutter.
As
soon
as the engine starts, release the ignition key and
warm
up the engine at
a fairly fast speed (see 'Warming up'). Check
that
the oil pressure gauge is
registering
and
that
the ignition warning light has gone out. Release the mixture
control from the locked position
and
push in the control as
soon
as the engine
will
run
evenly without its use.
Starter
Do not operate the starter for longer
than
five to six seconds.
To prevent damage the starter
cannot
be operated while the engine is running.
If after a reasonable number of attempts the engine should fail to start, switch
off the ignition
and
investigate the cause. Continued use of the starter when the
engine will
not
start, not only discharges the battery
but
may also damage the
starter.
The fast idle speed is obtained by pulling the control out
tin
. (6 mm.) .
Mixture
Always use the minimum setting for the shortest possible time.
control
I I I .
As soon as possible after the engine has started, push the contro comp ete y m.
(choke)
ance, excess exhaust emission s and, possibly , complete engine failure .
If the starter pinion fails to engage with the flywheel ring, or fails to disengage
when the engine starts, the starter will emit a high-pitched whine; release the
ignition key immediately. Should the starter pinion become
jammed
in mesh with
the flywheel ring,
turn
the squared end of the armature spindle with a spanner.
Fi!l....2
2
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distribution
of air between screen
and
car interior. To supply air to the car, open the
doors;
to boost the flow of air to the screen, close the doors.
Fig. 1
Controls
Heater
(Fig ..1). A valve controlling the flow of coolant through the heater
unit
is fitted at the rear of the cylinder head. The valve is opened by turning it in
an
anti-clockwise direction when heating is required or shut off by turningclockwise
when the system is to be used for cool air ventilation.
Air flow (Fig. 2). The
knob
(1) operates a valve in the air intake
and
controls the
flow of air to the car interior.
Turn
the
knob
anti-clockwise from the
'OFF'
position to open the valve, the valve is fully
open
when the
knob
is turned to
Starting
Check
that
the gear lever is in the neutral position.
If
the engine is cold, pull out the mixture control (choke). In extremely cold
'conditions it may be necessary to pull the control
out
to its fullest extent. Lock
the control in the desired position by turning the control
knob
clockwise.
Switch on the ignition, check
that
the ignition'warning light glows and
that
the
fuel gauge registers, then operate the starter.
NOTE.-After
switching the igni-
tion on, the fuel gauge needle moves slowly across the scale, taking some 30
seconds to reach the true reading. This slow reaction eliminates needle flutter.
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