Cooling System - Audi TT Roadster 2016 Owner's Manual

Cooling system

Coolant
The engine cooling system is filled at the factory
with a mixture of conditioned water and coolant
additive. This coolant must not be changed.
The coolant level is monitored by a warning lamp
• ¢page 14. However, we recommend that it
should be checked occasionally.
If you do need to top up the coolant, use a mix­
ture of water and coolant additive. We recom­
mend mixing coolant additive with distilled wa­
ter.
Coolant additive
The coolant additive contains anti-freeze and cor­
rosion protection agent. Only use one of the fol­
lowing coolant additives. It is possible to mix
these additives.
Coolant additive
G13
G12++
The amount of coolant additive which needs to
be mixed with the water depends on the temper­
atures to be expected in the winter season. If the
anti-freeze concentration is too low, the coolant
can freeze and cause engine damage.
Coolant addi·
tive
Hot regions min. 40%,
max. 45%
Cold regions min. 50%,
max. 55%
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CAUTION
- Have your qualified workshop check the
cooling system before the winter season to
make sure that the anti-freeze concentra­
tion is adequate for the conditions to be ex­
pected. This applies particularly if you drive
into a colder climate zone.
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- To prevent damage to the engine, do not
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use a different type of anti-freeze additive if
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the approved type of additive is not availa-
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Specification
TL 774 J
TL 774 G
Frost protec-
tion
min. -25 °C
max. -40 °C
Checking and topping up fluids
ble. In this case use only water and bring
the coolant concentration back up to the
correct level as soon as possible by putting
in the specified additive.
-Always top up with fresh, unused coolant.
- Radiator sealants must not be added to the
coolant.
Topping up coolant
Fig. 217 Engine compartment: Cap of coolant expansion
tank
Please refer to the safety notes ¢
on components in the engine compartment on
page 244.
Checking the coolant level
... Park your vehicle on a level surface.
.,.. Switch off the ignition.
.,.. Read off the coolant level on the coolant ex­
pansion tank¢ page 246, Fig. 214. When the
engine is cold, the coolant level should be be­
tween the marks. When the engine is warm, it
may be slightly above the top mark.
Topping up the coolant
Important: The coolant expansion tank must not
be empty ¢(D.
.,.. Wait for the engine to cool down .
.,.. Cover the cap on the expansion tank with a
cloth, and carefully unscrew the cap anti-clock­
wise ¢ ,&.
.,.. Add coolant in the correct concentration
¢ page 249 up to the top mark.
... You should make sure that the fluid level re­
mains stable. If necessary, add more coolant.
... Screw the cap on again tightly.
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