2012 SKODA OCTAVIA engine

Engine compartment overviewFig. 148
Principle sketch: Engine compartment
First read and observe the introductory information and safety warn- ings
on page 169.
Coolant expansion reservoir
174
Engine oil dipstick
172
Engine oil filler opening
173
Brake fluid reservoir
175
Battery (below a cover)
176
Windscreen washer fluid reservoir
176
Note
The location of the inspection points in the engine compartment of petrol and
diesel engines is practically identical.
123456Checking the engine oil levelFig. 149
Dipstick
First read and observe the introductory information and safety warn- ings on page 169.
The dipstick indicates the level of oil in the engine » Fig. 149.
Checking the oil level
›
Ensure that the vehicle is positioned on a level surface and the engine has reached its operating temperature.
›
Switch off the engine.
›
Open the bonnet.
›
Wait a few minutes until the engine oil flows back into the oil sump and remove
the dipstick.
›
Wipe the dipstick with a clean cloth and insert it again to the stop.
›
Pull the dipstick out again and check the oil level.
Oil level within range
A›
No oil must be refilled.
Oil level within range
B›
Oil can be refilled. Afterwards, the oil level can lie in the range
A
.
Oil level within range
C›
Oil must be replenished if the oil level is in the range
B
or lower.
The engine consumes a little oil. The oil consumption may be as much as 0.5 l/ 1 000 km depending on your style of driving and the conditions under which you
operate your vehicle. Consumption may be slightly higher than this during the
first 5 000 kilometres.
The oil level must be checked at regular intervals. We recommend after each time
you refuel or prior to making a long journey. 
172General Maintenance

We recommend maintaining the oil level within the range A, but not above , if
the engine has been operating at high loads, for example, during a lengthy motor-
way trip during the summer months, towing a trailer or negotiating a high moun- tain pass.
The warning light in the instrument cluster will indicate whether the oil level is too low » page 15 . Check the oil level using the dipstick as soon as possible. Add
oil accordingly.WARNINGDo not continue your journey if for some reason it is not possible  to top up
the engine oil under the prevailing conditions! Switch off the engine and seek
assistance from a ŠKODA specialist garage.
CAUTION
The oil level must on no account extend beyond the range A » Fig. 149 - Risk of
damaging the exhaust system!
Replenishing the engine oil
First read and observe the introductory information and safety warn-
ings
on page 169.
›
Check the engine oil level » page 172.
›
Unscrew the cap of the engine oil filler opening » Fig. 148 on page 172.
›
Replenish the oil in portions of 0.5 litres in accordance with the correct specifi-
cations » page 209 .
›
Check the oil level » page 172.
›
Carefully screw on the oil filler opening cap and push the dipstick in fully.

Changing engine oil
First read and observe the introductory information and safety warn-
ings
on page 169.
The engine oil must be changed at the intervals stated in the Service schedule or
according to the service interval indicator » page 11.
CAUTION
Do not pour any additives into the engine oil - Risk of serious engine damage!
Damage, which results from such product, are excluded from the warranty.
Note
If your skin has come into contact with oil, it must be washed thoroughly.
Coolant
First read and observe the introductory information and safety warn-ings
on page 169.
The coolant consists of water with a concentration of coolant additive. This mix-
ture guarantees antifreeze protection, protects the cooling/heater system
against corrosion and prevents the formation of scale.
Vehicles exported to countries with a mild climate are already factory-filled with
a coolant which offers antifreeze protection down to about -25 ℃. In these coun-
tries the concentration of coolant additive should be at least 40 %.
Vehicles exported to countries with a cold climate are already factory-filled with a
coolant which offers antifreeze protection down to about -35 °C. In these coun-
tries the concentration of coolant additive should be at least 50 %.
If a higher concentration of antifreeze is required for climatic reasons, the amount
of coolant additive can only be increased up to a maximum of 60 % (antifreeze
protection down to approx. -40 °C).
When refilling, only use the same antifreeze written on the antifreeze expansion tank » Fig. 150 on page 174. 
173Inspecting and replenishing

Coolant capacity1)Petrol enginesCapacities (in litres)1.2 ltr./63 kW TSI8.91.4 ltr./103 kW TSI10.21.8 ltr./132 kW TSI7.8Diesel enginesCapacities (in litres)1.6 ltr./77 kW TDI CR8.42.0 l/110 kW TDI CR - MG/DSG11,6 / 11,9
CAUTION
■
The amount of coolant additive in the coolant must never be allowed to be less
than 40 %.■
Over 60 % of coolant additive in the coolant reduces the antifreeze protection
and coolant effectiveness.
■
Other coolant additives that do not comply with the correct specifications can
above all significantly reduce the anticorrosion effect.
■
Any faults resulting from corrosion may cause a loss of coolant and can conse-
quently result in major engine damage!

Checking the coolant level
Fig. 150
Engine compartment: Coolant
expansion reservoir
First read and observe the introductory information and safety warn-
ings on page 169.
The coolant expansion bottle is located in the engine compartment.
Inspecting the coolant level›
Switch off the engine.
›
Open the bonnet.
›
Check the level of coolant in the coolant expansion bottle » Fig. 150.
Coolant level within range
A
The level may also rise slightly above the
A
marking when the engine is warm.
›
No coolant must be refilled.
Coolant level within range
A
and
B
When the engine is cold, the coolant level must lie between the
A
and
B
mark-
ings.
›
Coolant can be refilled.
Coolant level within range under
B›
Coolant must be refilled.
When the engine is cold, refill the coolant between the markings
A
and
B
.
If the coolant level in the expansion tank is too low, this will be signalised by the warning light 
illuminating in the instrument cluster » page 15, Coolant temper-
ature/coolant level 
, however we recommend you regularly check the coolant
level in the container directly.
Loss of coolant
A loss of coolant is first and foremost an indication of a leak in the system. Do
not merely top up the coolant. Have the cooling system checked by a ŠKODA spe- cialist garage.
WARNING Do not continue your journey, if for some reason it is not possible to top up
the coolant under the prevailing conditions! Switch off the engine and seek
assistance from a ŠKODA specialist garage. 1)
On vehicles that are fitted with an auxiliary heater (auxiliary heating and ventilation), the coolant ca-
pacity is approx. 1 l larger.
174General Maintenance

CAUTION■Do not fill the coolant above the mark A » Fig. 150 .■If a fault causes the engine to overheat, we recommend visiting a ŠKODA Part-
ner, otherwise serious engine damage may occur.

Replenishing the coolant
First read and observe the introductory information and safety warn-ings
on page 169.
Only refill with new coolant.
›
Switch off the engine.
›
Allow the engine to cool.
›
Place a cloth over the cap of the coolant expansion reservoir and unscrew the
cap carefully .
›
Replenish the coolant.
›
Turn the cap until it clicks into place.
Do not use an alternative additive if the specified coolant is not available in an emergency. In this case, just use water and have the correct mixing ratio of water
and the coolant additive restored by a ŠKODA specialist garage as soon as possi-
ble.

Radiator fan
First read and observe the introductory information and safety warn-
ings
on page 169.
After switching off the ignition, the fan can intermittently continue to operate for
approx. 10 minutes.
The radiator fan is powered by an electric motor. Operation is controlled accord-
ing to the temperature of the coolant.

Checking the brake fluidFig. 151
Engine compartment: Brake fluid
reservoir
First read and observe the introductory information and safety warn-
ings on page 169.
The brake fluid reservoir is located in the engine compartment.
›
Switch off the engine.
›
Open the bonnet.
›
Check the level of brake fluid in the reservoir » Fig. 151. The level must be be-
tween the “MIN” and “MAX” markings.
A slight drop in the fluid level results when driving due to normal wear-and-tear and automatic adjustment of the brake pads.
There may be an indication of a leak in the brake system, however, if the fluid lev-
el drops significantly within a short time or if it drops below the “MIN” marking.
If the brake fluid level is too low, this is indicated by the warning light 
lighting
up in the instrument cluster » page 14, Brake system 
.
WARNINGIf the fluid level has dropped below the MIN marking,  do not continue your
journey - risk of accident! Seek help from a ŠKODA specialist garage.

175Inspecting and replenishing

Brake fluid changeFirst read and observe the introductory information and safety warn-
ings
on page 169.
Brake fluid absorbs moisture. Over time it therefore absorbs moisture from the
environment.
Excessive water in the brake fluid may be the cause of corrosion in the brake sys-
tem.
The water content lowers the boiling point of the brake fluid.
The brake fluid must comply with the following standards or specifications: › VW 50114;
› FMVSS 116 DOT4.
WARNINGDo not use used brake fluid - the function of the brake system may be im-
paired - risk of accident!
CAUTION
Brake fluid damages the paintwork of the vehicle.
Note
The brake fluid is replaced as part of a proscribed Inspection service carried out by
a ŠKODA Partner.
Windscreen washer system
Fig. 152
Engine compartment: Wind-
screen washer fluid reservoirFirst read and observe the introductory information and safety warn-
ings on page 169.
The windscreen washer fluid reservoir is located in the engine compartment and
contains the cleaning fluid for the windscreen or rear window and for the head-
light cleaning system.
The capacity of the reservoir is about 3 litres or about 4.7 litres on vehicles that
have a headlight cleaning system.
Clear water is not sufficient to intensively clean the windscreen and headlights.
We recommend using clean washing water together with the screen cleaner from
the range of ŠKODA Original Accessories (in winter additionally with antifreeze)
which is capable of removing stubborn dirt.
In Winter, the washing water should always be mixed with antifreeze even if the
vehicle has heated windscreen washer nozzles.
Under exceptional circumstances, methylated spirits can also be used if no screen
cleaner with antifreeze is available. The concentration of methylated spirits must
not be more than 15 %. The freeze protection at this concentration is sufficient
only to -5 °C.
CAUTION
■ Under no circumstances must radiator antifreeze or other additives be added to
the windscreen washer fluid.■
If the vehicle is fitted with a headlight cleaning system, only cleaning products
which do not attack the polycarbonate coating of the headlights must be added
to the windscreen washer fluid.
■
Do not remove the filter from the windscreen washer fluid reservoir when re-
plenishing it with liquid otherwise the liquid transportation system can be conta-
minated, which can cause the windscreen washer system to malfunction.

Vehicle battery
 Introduction
This chapter contains information on the following subjects:
Battery cover
178
Checking the battery electrolyte level
179
Charging a vehicle battery
179


176General Maintenance

Disconnecting and reconnecting the vehicle battery180
Automatic load deactivation
180
Warning symbols on the vehicle battery
SymbolDescriptionAlways wear eye protection!Battery acid is severely caustic. Always wear gloves and eye protec-tion!Keep fire, sparks, open flames and lit cigarettes well clear of the ve-
hicle battery!When charging the vehicle battery, a highly explosive gas mixture is produced!Keep children away from the vehicle battery!
Improper handling of the battery can lead to damage occurring. We recommend
having all work on the vehicle battery be undertaken by a ŠKODA Partner.
WARNINGThere is a risk of injuries, poisoning, chemical burns, explosions or fire when
carrying out any work on the battery and on the electrical system. It is essen-
tial to comply with the warning instructions stated below and with the gener-
al applicable rules of safety.■
Keep children away from the vehicle battery.
■
The battery acid is strongly corrosive and must, therefore, be handled with
the greatest of care.
■
Always wear protective gloves, eye and skin protection when handling the
vehicle battery.
■
Corrosive fumes in the air irritate the air passages and lead to conjunctivitis
and inflammation of the air passages in the lungs.
■
Battery acid corrodes dental enamel and creates deep wounds after contact
with the skin which take a long time to heal. Repeated contact with diluted
acids causes skin diseases (inflammations, ulcers, skin cracks).
■
Acids coming into contact with water are diluted accompanied by significant
development of heat.
WARNING (Continued)■ Do not tilt the battery otherwise battery electrolyte may flow out of the bat-
tery vent openings. Protect the eyes with safety glasses or a shield! There is
the danger of suffering blindness!■
If any battery electrolyte comes into contact with your eyes, rinse the rele-
vant eye immediately with clear water for several minutes - consult a doctor
immediately!
■
Splashes of acid on your skin or clothes should be neutralised as soon as
possible using soap suds and then rinsed with plenty of water. If you swallow
battery acid, seek immediate medical assistance!
■
When you charge a battery, hydrogen is released, and a highly explosive gas
mixture is also produced. An explosion can be caused through sparkling over
during unclamping or loosening of the cable plug while the ignition is on.
■
Creating a bridge between the poles on the battery (e.g. with a metal object,
cable) creates a short circuit - risk of melting of lead struts, explosion and
burning of the battery, jets of acid spurting out.
■
It is prohibited to work with a naked flame and light.
■
Smoking or to carrying out any activities which produce sparks are prohibi-
ted.
■
Avoid creating sparks when working with cables and electrical devices.
Strong sparking represents a risk of injury.
■
Before carrying out any work on the electrical system, switch off the engine,
the ignition and all of the electrical components and disconnect the negative
terminal (-) on the battery.
■
The relevant lamp must always be switched off before a light bulb is re-
placed.
■
Never charge a frozen or thawed vehicle battery – risk of explosion and
caustic burns!
■
Replace a frozen vehicle battery.
■
Never jump-start vehicle batteries with an electrolyte level that is too low –
risk of explosion and caustic burns.
■
Never use a damaged vehicle battery – risk of explosion! Replace any vehicle
battery that is damaged. 
177Inspecting and replenishing

CAUTION■The vehicle battery must only be disconnected if the ignition is switched off,
otherwise the vehicle's electrical system (electronic components) can be dam-
aged. When disconnecting the battery from the electrical system, first of all dis-
connect the negative terminal (-) of the battery, followed by the positive terminal
(+).■
When connecting the battery to the electrical system, first of all connect the
positive terminal (+) of the battery, followed by the negative terminal (-). Under no
circumstances must the battery cables be connected incorrectly – risk of a cable fire.
■
Ensure that battery acid does not come into contact with the bodywork – risk of
damage to the paintwork.
■
Do not place the battery in direct daylight in order to protect the vehicle battery
housing from the effects of ultra-violet light.
■
If the vehicle has not been driven for more than 3 to 4 weeks, the battery will
discharge. This is because certain electrical components consume electricity (e. g.
control units) also in idle state. Prevent the battery from discharging by discon-
necting the battery's negative terminal (-) or continuously charging the battery
with a very low charging current.
■
If the vehicle is frequently used for making short trips, the vehicle battery will
not have time to charge up sufficiently and may discharge.
For the sake of the environment
A vehicle battery that has been removed is a special type of hazardous waste.
These must be disposed of in accordance with national legal regulations.
Note
You should replace batteries older than 5 years.
Battery coverFig. 153
Engine compartment: Polyester
cover of vehicle battery
First read and observe the introductory information and safety warn-
ings on page 176.
The battery is located in the engine compartment - in some models, underneath apolyester cover » Fig. 153.
›
Fold out the cover on the battery in the direction of the arrow .
The battery cover is installed in reverse order.
The edge of the polyester battery cover is inserted between the battery and the
side wall of the battery cover when working on the battery.

178General Maintenance

Checking the battery electrolyte levelFig. 154
Vehicle battery: Electrolyte level
indicator
First read and observe the introductory information and safety warn-
ings on page 176.
On vehicles with a vehicle battery fitted with a colour indicator, the so-called magic eye » Fig. 154, the electrolyte level can be determined by looking at the
change in colour.
Air bubbles can influence the colour of the indicator. For this reason carefully
knock on the indicator before carrying out the check.
› Black colour – electrolyte level is correct.
› Colourless or light yellow colour – electrolyte level too low, the battery must be
replaced.
For technical reasons, on vehicles with the description “AGM”, the electrolyte lev- el cannot be checked.
Vehicles with a START-STOP system are fitted with a battery control unit for checking the energy level for the recurring engine start.
We recommend you have the electrolyte level checked by a ŠKODA specialist ga-
rage from time to time, especially in the following cases.
› High external temperatures.
› Longer day trips.
› After each charge.
Winter time
The vehicle battery only has a proportion of the starting power in lower tempera- tures. A discharged vehicle battery may already freeze at temperatures just be-
low 0 °C .
We therefore recommend that you have the battery checked and, if necessary, re-
charged by a ŠKODA Partner before the start of the winter.
NoteThe battery electrolyte level is periodically checked by a ŠKODA Partner as part of
the Inspection Service.
Charging a vehicle battery
First read and observe the introductory information and safety warn-ings
on page 176.
A properly charged vehicle battery is essential for reliably starting the engine.
›
Switch off the ignition and all of the electrical components.
›
Only when performing a “quick-charge”, disconnect both battery cables (first of
all “negative”, then “positive”).
›
Attach the terminal clamps of the charger to the battery terminals (red = “posi-
tive”, black = “negative”).
›
Plug the mains cable of the charger into the power socket and switch on thedevice.
›
After charging has been successful: Switch off the charger and remove themains cable from the power socket.
›
Only then disconnect the charger's terminal clamps.
›
Reconnect the cables to the battery (first of all “positive”, then “negative”).
It is not necessary to disconnect the cables of the battery if you recharge the ve- hicle battery using low amperages (for example from a mini-charger). Refer to the
instructions of the charger manufacturer .
A charging current of 0.1 multiple of the total vehicle battery capacity (or lower) must be used until full charging is achieved.
It is necessary to disconnect both cables before charging the battery with high
amperages, so-called “ quick-charging”.
The vent plugs of the vehicle battery should not be opened for charging.
Replacing the vehicle battery
When replacing a battery, the new vehicle battery must have the same capacity,
voltage, amperage and be the same size. Suitable types of vehicle batteries can
be purchased from a ŠKODA Partner.
We recommend that the battery is replaced by a ŠKODA Partner, where the new
vehicle battery will be installed properly and the original battery will be disposed
of in accordance with national regulations. 
179Inspecting and replenishing