2007 SKODA OCTAVIA TOUR engine overheat

45
CONTROLS AND EQUIPMENT

Avoid high revs and running the engine
at full load until the engine has reached its
normal operating temperature.

Do not allow the engine to idle for a
lengthy period. If the engine is running
when the car is stationary, there is not al-
ways an adequate flow of air through the
radiator. In certain circumstances, this can
result in the engine overheating and also
in engine damage.

On vehicles with a catalytic converter
the engine must not be started by tow-
ing the vehicle more than 50 m. Other-
wise, unburnt fuel can pass into the
catalytic converter and cause damage.

Before trying to start engine by tow-
ing, use the battery from another vehi-
cle for jump-starting if possible - see
page 177.
Petrol enginesThese engines are equipped with a petrol
injection system that automatically supplies
the correct fuel/air mixture at all ambient
temperatures.
The information for starting these engines
therefore applies irrespective of the outside
temperature and is the same whether the
engine is cold or at normal operating
temperature :

Do not operate throttle before and
when starting the engine.

If the engine does not start immediately,
do not operate the starter for more than 10
seconds and wait about 30 seconds before
repeating the attempt to start the engine.

If the engine is very hot, it may be nec-
essary to depress the throttle slightly after
the engine starts.

If the engine still does not start, the fuse
for the electric fuel pump may have blown -
see page 167.
Contact your Škoda Dealer in this case.
Diesel enginesGlow plug system
After switching on the Drive position (igni-
tion on), the glow warning light comes on.
Start the engine immediately after the warn-
ing light goes out.
Starting a cold engine
Ambient temperature above +5 °C:
The engine can be started immediately
without preglow. Do not operate throttle
when starting engine.
Ambient temperature below +5 °C:

Turn the key in ignition lock to position
„2“ (see page 43) - the glow warning light
comes on. It goes out after the ignition tem-
perature is reached (see page 57).
While the glow plugs are working, do not
switch on any other major electrical
components as this would place an un-
necessary load on the battery.

When the warning lamp goes out, start
the engine immediately.

120DRIVING TIPS

Do not switch off the ignition when driv-
ing.

Do not overfill engine with oil - see page
140.

Do not tow start vehicle for more than
50 m - see page 179.
Warning
Due to the high temperatures which
can occur in catalytic converters in
very unfavourable conditions, the
vehicle should not be parked in such
a way that the catalytic converter can
come into contact with inflammable
materials.
Note
Even if the emission control system is op-
erating perfectly properly, there may be a
sulphurous exhaust smell in certain engine
operating conditions. This depends on the
sulphur content in the fuel being used.
Quite often this can be remedied by select-
ing another brand of fuel or filling up with
unleaded premium petrol.
Trouble-free operation of the
emission
control system is decisive for environmen-
tally friendly operation of the vehicle.
That is why it is important to note the fol-
lowing points:

Vehicles fitted with a catalytic converter
must only be driven on unleaded petrol -
see page 128.

Never drive until the fuel tank is comple-
tely empty on vehicles fitted with a catalytic
converter. The irregular fuel supply can
cause misfiring. This allows unburnt fuel in-
to the exhaust system which can cause
overheating and damage to the catalytic
converter.

If misfiring, a loss of power and rough
engine running occur when driving, this
may be caused by a fault in the ignition
system. In this case, uncombusted fuel can
get into the exhaust system and thus pass
to the atmosphere. In addition, the catalytic
converter may be damaged as a result of
overheating. Reduce your speed immedi-
ately and have the fault rectified at the near-
est Škoda Dealer. General notes


The wear of the brake pads depends to
a great extent on the driving conditions and
your style of driving. Consequently, it may
also be necessary to have the thickness of
the brake pads inspected at a Škoda Dealer
between the intervals stated in the Service
Schedule, particularly if your car is driven
frequently in towns or over short distances,
or in a very sporty manner.

Change down in good time when driv-
ing downhill, in order to make use of the
engine braking effect. This relieves the
strain on the brake system. When the bra-
kes are applied, do not keep them on con-
tinuously, apply and release the brakes al-
ternately.

Under certain operating conditions, for
example after driving through water, after
heavy rain or after washing the vehicle, the
braking effect may be retarded by wet, or
in winter iced-up brake discs and pads - the
brakes must be dried out first by applying
the footbrake.
Brakes

121
DRIVING TIPS
The full braking effect may also be delayed
when the car has been driven for some time
on heavily salted roads without using the
brakes, because the layer of salt on the
discs and pads has to be removed first.Warning
If a front spoiler, full-size wheel trims
etc., are retrofitted, it is necessary to
ensure that the flow of air to the front
brakes is not restricted - otherwise
the brakes may overheat.
Brake booster
The braking force boosts the pressure,
which you generate with the brake pedal.
The necessary pressure is only generated
when the engine is running. Warning
The brake booster only operates
when the engine is running.
Never switch off the engine before
the vehicle is stationary.
In the case that the brake booster is
not operating - e.g. because the vehi-
cle has to be towed or because there
is damage to the brake booster - the
brake pedal has to be depressed with
a significantly greater force, in order
to balance out the missing brake
boosting effect.Because if you do not stop as nor-
mal, this can cause an accident and
severe injuries.
Brake Assist*
The Brake Assist boosts the brake servo
effect during a brake application in a haz-
ardous situation and is able in this way to
assist the rapid build-up of brake pressure.
In emergency situations the majority of car
drivers do apply the brakes in time, but not
with the brake pedal force which is neces-
sary for achieving maximum deceleration.
Valuable braking distance is lost as a result!The Brake Assist is activated as soon as the
brake pedal is depressed very rapidly. A hig-
her brake servo assistance than is usual in
normal brake applications, is then available.
Consequently, it is possible to build up
within a very short time the brake pressure
which is required for achieving maximum
deceleration with only a correspondingly
slight counterforce on the brake pedal.Depress the brake pedal further for achiev-
ing the shortest possible braking distance. Do
not reduce the foot pressure on the pedal!The Brake Assist is able in this way to help
you in critical situations by building up the
brake pressure more rapidly and shorten-
ing the stopping distance. The advantages
offered by the ABS are fully exploited by the
Brake Assist. As soon as the brake pedal is
released, the Brake Assist function is swit-
ched off then automatically and the usual
service brake function is again available.
Warning

The Brake Assist is also not in a
position to overcome the physical
limits which apply to the braking dis-
tance.

This is something you should re-
member particularly when driving on
smooth or wet road surfaces.

Adapt your style of driving always
to the road condition and the traffic
situation. The increased safety which
the Brake Assist offers you must not
lead you to take any safety risk!

143
GENERAL MAINTENANCE
Loss of coolantA loss of coolant is first and foremost an
indication of a leak. In this case, the cool-
ing system should be inspected by a Škoda
Dealer. It is not sufficient merely to top up
the coolant.
If there is no leak in the system, losses may
also occur if the coolant boils as a result of
overheating and is forced out of the cool-
ing system.
If it is not possible to find and rectify the
cause of overheating, contact a Škoda
Dealer as soon as possible - otherwise
major engine damage may result.Topping up coolantFirst of all, switch off the engine and allow
it to cool down. Then, place a rag around
the cap of the expansion reservoir and
carefully unscrew the cap.Warning
Do not open the cap of the expansion
reservoir when the engine is hot -
risk of scalding. The cooling system
is pressurized!
Checking coolant levelThe coolant reservoir is located in the right
of the engine compartment.
The coolant level can be correctly checked
only when the engine is not running.
When the engine is cold, the coolant in the
expansion reservoir must be in the area of
the „ MIN“ mark and the crosshatched area.
When the engine is warm, the coolant level
may be slightly above the crosshatched
area. If, in exceptional cases, it is only possible
to top up the system with water, the correct
mixture concentration should be restored
without delay by using the specified cool-
ant additive.
If there is a major loss of coolant, do not
pour in coolant until the engine has cooled
down to avoid any engine damage.
Do not top up beyond the crosshatched
area!
Excess coolant is forced out of the cooling
system by the pressure relief valve in the
cap of the expansion reservoir when the
coolant heats up.
Screw the reservoir cap tight!
If the event that you do not have enough
coolant,
do not drive any further. Switch
off the engine and contact a Škoda Dealer
for professional assistance, otherwise there
is a risk of serious engine damage.