2014 AUDI Q7 overheating

Catalytic converter
Applies to vehicles: with gasoline engine
It is very important that your emission con­
trol system (catalytic converter) is function­
ing properly to ensure that your vehicle is run­
ning in an environmentally sound manner .
... Always use lead-free gasoline c::> page 249,
Gasoline .
... Never run the tank down all the way to emp­
ty .
... Never put too much motor oil in your engine
c::> page 263, Adding engine oil 't=r..
.,. Never try to push-or tow-start your veh icle.
The catalytic converter is an eff icient "clean­
up" device built into the exhaust system of
the vehicle. The catalytic converter burns
many of the pollutants in the exhaust gas be­
fore they are released into the atmosphere.
The exclus ive use of unleaded fuel is cr it ically
i mportant for the life of the cata lytic convert­
e r and proper functioning of the engine.
& WARNING ,~
T he temperature of the exhaust system is
high, both when driving and after stopping
the engine .
- Never touch the exha ust tail pipes once
they have become hot. This could result
in burns.
- Do not park or operate the vehicle in
areas where the hot exhaust system may
come in contact with dry grass, brush,
fuel spill or other material which can
cause a fire.
- Do not apply additional undercoating or
rustproofing on or near the exhaust
manifold, exhaust p ipes, catalytic con­
verter or heat shields . During driving, the
substance used for undercoating cou ld
overheat and cause a fire.
(D Note
- Be aware that just one tank f illing with
leaded fuel will already seriously de-
grade the performance of the catalytic
conve rter.
Dri vin g and en vironm ent 233
-Do not exceed the correct engine oil level
c::> page 263.
- Do not drive until the fue l tank becomes
completely empty. The engine cou ld mis­
fire. Unburned fuel could also get into
the exhaust system and this cou ld cause
the catalytic converter to overheat.
- Do not turn off the ignition while the ve­
hicle is mov ing.
- Do not continue to operate your veh icle
under these conditions, as otherwise fuel
can reach the catalyt ic converter. Th is
cou ld result in overheating of the con­
verter, requir ing its replacement.
- To assure efficient operation of the Emis­
sion Control System:
- Have you r vehicle main tained properly
and in accordance w ith the se rv ice rec­
ommendations in your Warranty & Maintenance book let.
- Lack of proper maintenance as we ll as
improper use of t he vehicle will impair
the function of the emission contro l
system and could lead to damage.
@) For the sa ke of the env ironment
Even when the Emission Control System is
operating properly, the exhaust gas can have a sulfur-like exhaust gas smell under
some operat ing states. This depends on
the sulfur content of the fuel being used .
Using a different brand of fuel may help,
or filling the tank with lead-free s uper
g rade gasoline.
Diesel particulate filter
App lies to vehicles: wit h diese l eng ine
The diesel part iculate filter filters nearly all of
the soot pa rticles out of the exhaust . T he fil­
te r clea ns itself automat ica lly under no rma l
driv ing cond itions. If the filter cannot clean it ­
self (for example, because you are on ly driving
short distances), the fi lter becomes clogged
with soot and the
Ill symbo l for the diesel
particulate filter i lluminates
c::> page 36. ..,_
•
•

264 Check ing and filling
a reason to change the oil more often than
recommended.
A WARNING
Stop! Before working in the engine com­
partment, a lways read and heed all WARN­
INGS
c> .&. in Working in the engine com­
partment on page 257. The engine com­
partment of any motor veh icle is a poten­
tially dangerous a rea and can cause ser i­
ous personal injury.
A WARNING
If you must change the engine oil in your
vehicle:
- Always wea r eye p rotection.
- T o reduce the r isk of burns from hot en-
gine oil let the engine cool down to the
touch.
- When removing the oil drai n plug with
yo ur finge rs, stay as far away as possible.
Always keep your forea rm pa ra ll el t o the
ground to he lp prevent hot oil from run­
ning down your arm.
- Dr ain the o il into a container designed
for this p urpose, one large enough to
hold at least the total amount of oil in
yo ur engine .
- T o reduce the r is k of po ison ing, never use
empty food or beverage containers that
might mis lead someone into drinking
from them.
- Engine oil is poisono us. Keep it well out
of the reach of children.
- Cont inuo us contact with used engine oil
is harmful to your skin . Always protect
yo ur sk in by washing thoro ughly with
soap and water.
@ Note
Never mix oil ad ditives with your engine
oil. These additives can damage your en­
gine and adverse ly affect your Audi Limit­
ed New Vehicle Warranty.
(® For the sake of the environment
- Before changing the oil, first make sure
you know where you can prope rly dispose
of the old o il.
- Always dispose of used oil p roperly. Nev­
er dump it on garden soil, in wooded
areas, into streams or down sewage
dra ins.
- Recycle used o il by tak ing it to a used en­
gine oil collection facility in your area, or
contact a se rvice station.
- We strongly recommend that yo u have
your oil cha nged by an authorized Audi
dealer or a qualified workshop with the
special tools a nd expert ise required, and
prope r m eans of disposal.
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
tects the engine from freezing in the winter.
T he cooling sys tem is sealed and genera lly re­
quires little attention.
T he coo lin g sys tem has been fi lled a t the fac­
tory with a permanent coolan t which does not
need to be changed . The coo lant cons ists of a
mixture of specially conditioned water and the
manufacture r's g lycol-basedcoo lant add i-
t ive
Gl3 antifreeze with anticorrosion addi­
t ives (SO% for USA models; 60% for Canadian
models). This mixture both assures the neces­
sa ry frost protection and protects metal com ­
ponents in the eng ine's cooling system from
corros io n and scaling.
It also ra ises the bo il­
i ng po in t of the coolan t.
Do not reduce the concentration of the cool ­
ant in the summer by addi ng p lain water .
The
proportion of coolant additiv e must be at
lea st 50 % but not more than 60°/o
to main ­
t ai n ant ifree ze pro te ct io n and cooling eff ic ien­
cy .
If the coo lant fros t protec tion is too low '
t h e coo lant co uld freeze and damage the vehi-
cle heating and engine cooling system. ..,.

26 6 Ch eck ing and filling
Coolant lo ss
Coolant loss may indicate a l ea k in t he cooling
system. In the event of coolant loss, the cool ­
ing system should be inspected immediately
by your authorized Audi dealer. It is not
enough merely to add coolant.
I n a
se ale d system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
A WARNING
The cooling system is under pressure and
can get very hot. Reduce the risk of scald­
ing from hot coolant by following these
steps .
- Turn off the engine and allow it to cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag .
- Turn the cap slowly and very carefully in
a counter -clockwise direction wh ile ap ­
plying light, downward pressure on the
top of the cap .
- To avoid being burned, do not spill ant i­
freeze or coolant on the exhaust system
or hot eng ine parts. Under certain condi­
t ions, the ethy lene g lycol in engine cool­
an t can ca tch f ire.
0 Note
Do not add any type of radiator leak seal­
ant to your vehicle's eng ine coolant. Add­
ing radiato r repair fluid may adve rsely af­
fect the function and performance of your
cooling system and could res ult in damage
not covered by your New Vehicle Limited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything i n the engine com­
pa rtmen t,
a lwa ys rea d and h eed all WARN ­
INGS c:::> A in Working in the engine compart ­
ment on page 257.
.. Tu rn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coo lant expansion
tank
c> page 265 , fig. 245 and car efully
twist the cap counter-clockwise c> ,&. .
.. Add coo lant m ixed in the correct rat io
c:::> page 264, Coolant.
.. Twist the cap on again tightly.
Replacement engine coolant must conform to
exact spec ificat ions
c> page 264, Coolant.
We recommend using only coo lant additive
G12 ++, G13 or in an emergency G12 +. Do
not
use a different add itive. In an emergency use
plain water until you can get the correct addi­
t ive and can restore the correct ratio . This
shou ld be done as soon as poss ib le.
If you have lost a considerable amount of
coolant, then you should add cold ant ifreeze
and co ld water only when the eng ine is cold .
Always use
new engine coolant when refilling.
Do not fi ll coolant above the "MAX" mark. Ex­
cess coolant will be forc ed out through the
pressure relief valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps.
- Turn off the engine and allow it to coo l
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering
the cap with a large, th ick rag.
- Turn the cap s low ly and very carefully
in a counter-clockwise direction while
applying light, downward pressure on
the top of the cap.
- To avoid being burned, do not spill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certain
cond it ions, the ethylene g lycol in en ­
gine coolant can catch fire .

2 9 6 What do I do no w?
• Secure the wheel with the large screw.
• Fold the cargo floor back down .
After using th e inflat able spare wheel
The inflatable spare t ire can be re-used as
l ong as it is not damaged and is not worn
down to the tread wear indicators
c::> A .
When you let the air out of the inflatable
spa re tire, it does not assume its folded shape
again for several ho urs. Until then, it cannot
be p laced back in the spare wheel well and
stowed securely.
A WARNING
- Never use the spare tire if it is damaged
or if it is worn down to the tread wear in­
dicators.
- If the inflatable spare tire is more than 6
years old, use it on ly in an emergency
and with extreme caut ion and careful
driv ing .
- The inflatable spare tire is intended only
for temporary and short-term use .
It
should be replaced as soon as possible
with the no rmal wheel and tire .
- The tire pressure value for the inflatable
spare t ire is located on the driver's side
B-p illar
c::> page 277, fig . 250.
-Maximum perm iss ible speed is SO mph
(80 km/h).
- Avoid full-throttle acce lerat ion, heavy
braking, and fast corner ing .
- When the air is let out of the inflatable
spare wheel, it does not assume its fold­
ed shape for several hours . Until then, it
cannot be placed back in the spare wheel
we ll and stowed secu rely.
- Never drive with more than one inflata­
ble spare ti re.
- For technical reasons, the use of tire
chains on the inf latable spare tire is not
permitted.
If i t is necessary to drive w ith
t ir e cha ins, the infla table spare wheel
must be mounted on the front axle in the
event of a flat in a rear tire . The newly
available front whee l must the n be in­
sta lled in place of the rear wheel with the flat tire
. Insta lling the ti re cha in be­
fore mounting the wheel and tire is rec­
ommended.
- Loose items in the passenger compart­
ment can cause serious personal injury
during hard brak ing or in an accident.
Never store the inflatable spare tire or
jack and tools in the passenge r compart­
ment.
(D Note
- The inflatable spare tire has been deve l­
oped specifically for th is veh icle model.
It must not be exchanged or used for
other vehicle models. Sim ila rly, inflata­
ble t ires from other vehicle models m ust
no t be used.
- Norma l summer or w inte r ti res must not
be ins talled on the infla table t ire rim.
Inflating inflatable spare tire
• Remove the compressor from the luggage
compartment
c::> page 295 , fig. 259.
• Unscrew the valve stem from the spare tire.
• Screw the tire f iller hose from the compres­
sor firmly onto the
valve of the spare tire.
• Insert the plug from the compressor into an
outlet of the ve hicle
c::> page 88 .
• Switch the comp ressor on .
• Let the compressor run unti l the va lue speci­
fied on the ti re p ressu re label is reached
c::> page 2 77, fig. 250 . Switc h the compres­
sor off after running for 12 m inutes at the
most -danger of overheating!
A WARNING
-The compressor and the tire f iller hose can
become extremely hot while they are run­
n ing -danger of burns!
([) Note
Switch the compressor off after running
for 12 min utes at the most -danger of
overheating! Allow the compressor to cool
down for a few m inutes before you use it
again .