Table of Contents
Advertisement
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 specially conditioned water and the
manufacturer's
glycol-based coolant addi-
tive G13 antifreeze with anticorrosion addi-
tives (50% for USA models; 60% for Canadian
models). This mixture both assures the neces-
sary frost protection and protects metal com-
ponents in the engine's cooling system from
corrosion and scaling. It also raises the boil-
ing point of the coo lant.
Do not reduce the concentration of the cool-
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 antifreeze protection and cooling efficien-
cy. If the coolant frost 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
the factory for temperatures
down to:
- -31°F(-35°C)USA
- - 40 °F ( - 40 °C) Canada.
If you must add coolant, use a mixture of wa-
ter and coolant additive. Mixing the coolant
additive with distilled water is recommended.
&
WARNING
Before you check anything in the engine
compartment,
always read and heed all
WARNINGS¢ .&.
in Working in the engine
compartment on page 206.
(D
Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
Checking
and filling
213
your vehicle is sufficient to meet the cli-
mate conditions. 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 coolant additive
to 60%.
- When adding coolant additive to your
cooling system, remember:
- We recommend using only coolant ad-
ditive G12++ or G13 for your vehicle.
This coolant additive is available at au-
thorized Audi dealers. Other types of
antifreeze can significantly reduce cor-
rosion protection. The resulting corro-
sion can cause a loss of coolant and se-
rious engine damage.
- Do not add any type of radiator leak seal-
ant to your vehicle's engine coolant.
Adding radiator repair fluid may adverse-
ly affect the function and performance of
your cooling system and could result 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. 164
Engine compartment: Cover on the coolant
expansion tank
"' Before you check anything in the engine
compartment,
always read and heed all
WARNINGS
¢ .&, in Working in the engine
compartment on page 206.
"'Park your vehicle on a level surface .
.,. Turn off the ignition.
.,. Read the engine coolant level from the cool-
ant expansion tank ¢
fig. 164,
¢
page 208 ,
fig. 161.
With a cold engine, t he coolant
Iii>
Advertisement
Table of Contents
