264 Ch e ck ing and filling
Coolant lo ss
Coolant loss may indicate a lea 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.
In 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 ions, the ethy lene g lycol in engine cool-
an t ca n cat ch 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 in t he engine com-
pa rtmen t ,
always read and heed all WARN-
INGS c:::> A in Working in the engine compart -
ment on page 256.
.. Turn 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.
Replacement 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 ible.
If you have lost a considerab le amount of
coolant, the n you should add cold ant ifreeze
and cold water on ly when the eng ine is cold .
Always use
new engine coolant when refilling.
Do not fill coo lant above the "MAX" mark . Ex-
cess coolant will be forced out 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 slowly 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 glycol in e n-
gine coolant can catch fire .
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