Skoda Rapid NH 2013 Maintenance, Workshop Manual page 82

Rapid NH 2013 ➤ , Rapid NH 2014 ➤
Maintenance - Edition 06.2018
The scale -2- of the refractometer - T10007 A- is valid for the
coolant additives G13.
– Clean the measuring glass of the refractometer after inspect‐
ing the antifreeze.
Antifreeze protection of the coolant
WARNING
Antifreeze protection of the coolant must be ensured down to
-25 °C.
In countries with an arctic climate, the antifreeze protection of
the coolant must be guaranteed to -35 °C.
If a greater antifreeze concentration is required for climatic
reasons, the concentration may be increased up to 60% (i.e.
antifreeze protection down to approx -40°C). Any further in‐
crease in concentration increase would reduce the antifreeze
protection and impair cooling efficiency.
Coolant mixture ratio
Antifreeze protection down to Coolant additive Distilled water
-25°C
-35°C
-40°C
Replenishing coolant additive
WARNING
The cooling system is filled all year round with a mixture of
distilled water and coolant additive with anti-corrosion agent.
Coolant additives prevent damage from frost and corrosion
and the accumulation of lime scale while also raising the boiling
point of the coolant. For this reason, it is imperative that the
cooling system remains filled with coolant additive with corro‐
sion protection which has these properties the whole year
round.
The water used for mixing is an important influencing factor on
the effectiveness of a coolant. The water quality was defined
based on the ingredients that can vary by country or region.
Distilled water meets all requirements. For this reason, the
coolant must be mixed with distilled water for topping off and
new fillings.
All coolant additives, approved by ŠKODA AUTO a.s., prevent
frost and corrosion damage as well as the formation of scale and
also increase the boiling point.
For these reasons you must use coolant additives all year round.
The higher boiling temperature of the coolant contributes to the
engine's reliability when the engine is stressed, especially in
countries with a tropical climate.
Other coolant additives may specifically impair the provided cor‐
rosion protection.
The resulting corrosion damage may lead to a loss of coolant and
subsequently cause major engine damage.
78
approx. 40 % approx. 60%
approx. 50 % approx. 50 %
approx. 60% approx. 40 %