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-
qu ires 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 anticorros ion 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 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 mo re than 60% to main-
tain antifree ze protection and cooling efficien-
cy. If the coolant frost protection is too low,
the coolant could freeze and damage the vehi-
cle heating and eng ine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -31°F(-35°C)USA
- - 40 °F ( - 40 °C) Canada.
If you must add coo lant, use a mixture of wa-
ter and coolant addit ive. Mixing the coolant
additive with distilled wate r is recommended.
& WARNING
Before you check anything in the engine
compartment, always read and heed all
WARNINGS c::;, .&. in Working in the engine
compartment on page 214.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
Checkin g and fillin g 221
your vehicle is sufficient to meet the cli-
mate conditions. This is especia lly 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 on ly 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. 18 5 Engine compar tm ent: Cover on the coolant
expansio n t ank
"' Before you check anything in the engine
compa rtme nt,
always read and heed all
WARNINGS c::;, .&, in Working in the engine
compartment on page 214.
"' Park your vehicle on a level su rface .
.,. Turn off the ignition .
.,. Read the engine coolant level from the cool-
ant expansion tank
i=> fig. 185, c::;, page 216,
fig . 182. With a cold engine, the coolant Iii>
To Next Page
Loading...
