engine overheat AUDI Q7 2015 Owner´s Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 2015, Model line: Q7, Model: AUDI Q7 2015Pages: 350, PDF Size: 86 MB
Page 264 of 350

26 2 Ch eck ing and filling
8_ WARNING
Stop! Before working in the engine com
partment, always read and heed all WARN
INGS
~ .&. in Working in the engine com
partment on page
256 . The engine com
partment of any motor veh icle is a poten
tially dangerous area and can cause ser i
ous personal injury.
8_ WARNING ,,,__
If you must change the engine oil in your
vehicle:
- Always wea r eye protection .
- T o reduce the ris k of burns from hot en-
gine oil let the engine cool down to the
touch.
- Whe n removing the oil drain plug with
yo ur fingers, stay as far away as poss ible.
Always keep your forearm paralle l to the
ground to he lp prevent hot oil from run
ning down your arm.
- Drain the oi l into a container designed
for this pu rpose, one large enough to
hold at least the total amount of oil in
your engine.
- To reduce the risk of poisoning, never use
empty food or beverage containers that
might m islead someone into dr ink ing
from them.
- Engine oil is poisonous. Keep it well out
of the reach of children.
- Cont inuous contact with used engine oil
is harmful to your skin. Always protect
your sk in by washing thoroughly with
soap and water .
(D Note
Never mix oil additives with your engine
oil. These additives can damage your en
gine and adverse ly affect your Audi Limit
ed New Vehicle Warranty.
@i For the sake of the environment
- Before changing the oil, first make sure
you know where you can properly dispose of the old oil.
-
.
- Always dispose of used oil p roperly. Nev
er dump it on garden soil, in wooded
areas, into st reams or down sewage
dra ins.
- Recycle used oi l by taking it to a used en
gine oil collection facility in your area, or
contact a service station.
- We strongly recommend that yo u have
your oil changed by an authorized Audi
dealer or a qualified workshop with the
special tools and expert ise required, and
proper means 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.
The cooling system has been fi lled at the fac
tory with a permanent coolant which does not need to be changed. The coo lant cons ists of a
mixtu re of specially conditioned water and the
manufacturer's g lycol -basedcoo la nt add
i-
tive G l3 antifreeze with anticorrosion addi
tives (SO% for USA mode ls; 60% for Canadian
models). This mixture both assures the neces
sary frost protection and protects metal com
ponents in the eng ine's cooling system from
corros ion and scaling.
It also ra ises the bo il
i ng po int of the coolant .
Do not reduce the concentration of the cool
ant in the summer by adding p lain wate r. Th e
proportion of coo lant additiv e mu st be at
l e as t 50 °/4 but not m ore than 60°/4
to main
ta in ant ifreeze protect io n and cooling eff ic ien
c y.
If the coo lant fros t protection is too low,
the coolant could freeze and damage the vehi
cle heating and engine cooling system.
For year- round driving, antifreeze is added at
t h e factory fo r temperatures down to:
- -31°F(-35°C)USA
- - 40 °F ( - 40 °C) Canada.
Page 266 of 350

264 Check 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 io ns, the ethy lene g lycol in engine cool
an t ca n 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 read and heed all WARN
INGS c:::> A in Working in the engine compart
ment on page 256.
.. Tu rn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coo lant expansion
tank
c> page 263 , fig. 246 and carefully
twist the cap counter-clockwise c> ,&. .
.. Add coo lant m ixed in the correct rat io
c:::> page 262, Coolant.
.. Twist the cap o n again tightly.
Rep lacement engine coo lant must conform to
exact spec ificat ions
c> page 262, Coolant.
We recommend using only coo lant add it ive
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 considerab le amount of
coolant, the n you should add cold ant ifreeze
and co ld water on ly when the eng ine is cold .
Always use
new engine coolant when refilling.
Do not fi ll coo lant above the "MAX" mark. Ex
cess coolant will be forced o ut 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 engi ne parts. Under certain
cond it ions, the ethylene g lycol in e n
gine coolant can catch fire .