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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 .
The cooling system is sealed and generally re-
quires little attention .
The cooling system has been filled at the factory
with a permanent
coolant which does not need to
be changed . The coolant consists of a mixture of
specially condit ioned water and the manufactur -
er's glycol-basedcoolant
add itive G13 antifreeze
with anticorrosion additives (SO% for USA mod-
e ls; 60% for Canadian mode ls). This m ixture
both ass ures the necessa ry frost protection and
protects metal components
in the engine's coo l-
ing system from corrosion and scaling .
It
also
raises the boiling point of the coolant.
Do not red uce the concent ration of the coolant in
the summer by adding plain water. The propor-
tion of coolant addit ive must be at least 50 %
but not more than 6 0 % to mainta in antifreeze
protection and cooling efficiency. If the coolant
frost protection is too low, the coolant could
freeze and damage the vehicle heating and en-
g ine cooling system .
For year-round driving, antifree ze is added at the
factory for temperatures
down to :
- - 31° F ( - 3S°C)USA
- - 40 °F ( - 40 °C) Canada.
If you must add coolant, use a m ixture of water
and coolant addit ive. Mixing the coolant additive
with d istilled water is recommended .
_&
WARNING
Before you chec k anythi ng in t he engine com-
partment,
always read and heed all WARN-
INGS
¢ .&.in Working in the engine compart-
ment on page 193 .
(D
Note
- Befo re winter se t s in, have the coo lant
checked to see if the coolant additive in your
vehicle is sufficient to meet the cl imate con -
Ch e c k ing an d Filling
ditions. This is especially important if you
live in a region where the winter is extreme-
ly cold. If necessary, increase the proportion
of coolant additive to 60%.
- When adding coolant additive to your cool-
ing system, remember :
- We recommend us ing only coolant add i-
tive G12+ + or G13 for yo ur vehicle. This
coolant addit ive is avai lab le at aut horized
Audi dealers . Ot her t ypes of antifree ze can
significantly reduce corrosion pro t ect ion .
The resulting corrosion can cause a loss of
coolant and serious engine damage.
- Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Adding ra -
diator repair fluid may adversely affect the
function and performance of your cooling
system and cou ld resu lt in damage not cov-
ered by your New Veh icle Limited Warra nty .
Checking the engine coolant level
The engine coolant level can be checked with a
quick glance.
Fig. 1 63 Engin e com par t men t : Cover on the coo lant ex-
pansion tank
.. Before you check anything in the eng ine com-
partment, always re ad and heed all WARN-
INGS
¢
,A
in Working in the engine compart -
ment on page 193 .
.. Par k your veh icle on a leve l surface.
.. Tur n off t he ignit ion .
.. Read the eng ine coolan t leve l from the coo lant
expansion tank ¢
fig. 163,
¢
page 195,
fig. 160 .
With a cold engine, the coo lant level
should be between the "MIN" and "MAX" mark-
ings. When the eng ine is warm, the level may
be slightly above the "MAX" marking.
.,..
199
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