Note
♦
The water used for mixing has a major influence on the effec‐
tiveness of the coolant. Because the water quality differs from
country to country and even from region to region, the quality
of the water to be used in the cooling system has been speci‐
fied by Volkswagen. Distilled water fulfils all requirements.
Therefore, only ever use distilled water when mixing coolant
for topping up or renewing coolant.
♦
Use only coolant additives which conform with the ⇒ Elec‐
tronic parts catalogue (ETKA) . Other coolant additives may
reduce corrosion protection substantially. The resulting dam‐
age could lead to loss of coolant and subsequent severe
damage to the engine.
♦
Mixed in the proper proportions, coolant inhibits frost and cor‐
rosion damage as well as scaling. Such additives also raise
the boiling point of the coolant. For this reason, the cooling
system must be filled all-year-round with coolant additives.
♦
Because of its high boiling point, the coolant improves engine
reliability under heavy loads, particularly in countries with trop‐
ical climates.
♦
The refractometer - T10007A- or refractometer - T10007B-
must be used to determine the current anti-freeze value.
♦
The scale -1- of the refractometer is calibrated for the coolant
additives G12++ and G12evo.
♦
The scale -2- of the refractometer is calibrated for the coolant
additive G13.
♦
If it is not possible to ensure that the same type of coolant
additive is filled: always determine anti-freeze protection using
the scale for G13.
♦
Frost protection must be guaranteed down to -25°C as a min‐
imum and, in countries with arctic conditions, down to approx.
-36°C. Increasing the frost protection is permissible only if cli‐
matic conditions require stronger frost protection. It may, how‐
ever, be increased only to a maximum of -48°C. Otherwise,
the cooling effect will be impaired.
♦
Do not reduce the coolant concentration by adding water even
in warmer seasons and in warmer countries. Frost protection
must be guaranteed down to at least -25°C.
♦
The temperature reading on the refractometer corresponds to
the »ice flocculation point«. Flakes of ice may start forming in
the coolant below this temperature.
♦
Never reuse old coolant.
♦
Use only a water/coolant additive mixture as a slip agent for
coolant hoses.
Recommended mixture ratios:
Frost protection
to:
Amount of anti-
freeze
Coolant ad‐
ditive
Distilled wa‐
-25°C
-36°C
40%
50%
3.6 l
4.5 l
5.4 l
4.5 l
3) The quantity of coolant can vary depending upon vehicle equipment.
Procedure:
CC 2012 ➤ , Passat 2011 ➤ , Passat Variant 2011 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 06.2019
1. Cooling system/coolant
145
