226 Ch e ck ing and filling
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 .
The cooling system is sealed and generally re-
quires little attention .
The cooling system has been filled at the fac-
tory with a permanent coolant which does not
need to be changed. The coolant consists of a
mixture of water and the manufacturer's gly -
col-basedcoolant additive G13 antifreeze with
anticorrosion add itives (SO% for USA mode ls;
60% for Canadian models). This mixture both
assures the necessary frost protection and
protects metal components in the engine's
cooling system from corrosion and scaling. It
a lso raises the boiling point of the coolant .
Do not reduce the concentration of the coo l-
ant in the summer by adding plain water .
The
proportion of coolant additive must be at
least 50 % but not more than 60%
to main-
tain antifree ze protection and cooling efficien-
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i-
cle heating and eng ine cooling system .
For year-round driving, antifreeze is added at
the factory for temperatures down to:
- -31° F ( - 3S°C)USA
- - 40 °F ( - 40 °C) Canada.
_& WARNING
Before yo u check anything in the engine
compartment, always read and heed all
WARNINGS
¢ &. in Working in the engine
compartment on page 219.
(]) Note
-
- Before winter sets in, have the coolant
checked to see if the coo lant additive in
your vehicle is sufficient to meet the cli-
mate cond it ions . This is especially impor-
tant if you live in a region where the win-
ter is extremely cold . If necessary, in-
crease the proportion of coo lant additive
to 60%.
- When adding coolant additive to your
cooling system, remember:
- We recommend us ing on ly coolant ad-
d itive G12++ or G13 for your veh icle .
This coolant additive is availab le at au-
thor ized Audi dealers. Other types of
ant ifreeze can significantly reduce cor-
rosion prot ection. The resulting cor ro-
sion can cause a loss of coolant and se -
rious engine damage.
- Do not add any type of rad iator leak seal-
ant to yo ur vehicle's engine coolant .
Adding radiator repair fluid may adverse -
ly affect the function and performance of
your cooling system and cou ld resu lt in
damage not covered by your New Vehicle
Limited Warranty.
'
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 187 Engine compa rtm ent : Cover on the coo lant
expans ion ta nk
-
"'
-
"'
><
.,
"'
.. Before you check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ .&. in Working in the engine
compartment on page 219 .
.,. Park your vehicle on a level surface .
.,. Turn off the ignition .
.. Read t he engine coolant level from the
coo lant expansion ta nk ¢
fig. 187 ,
r=:> page 221, fig. 184 . With a cold engine,
the coolant leve l should be between the
"MIN" and "MAX" markings . When the en-
gine is warm, the level may be slightly above
the "MAX" marking.
IJII,
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