engine overheat AUDI Q7 2014 Owner´s Manual

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 .