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4.36 Cooling System, Checking Freeze Pro‐
tection and Coolant Level
Note
♦
The water used for mixing greatly influences the effectiveness
of the coolant. Do to the different water contents which can
vary due to country or region, the water quality used is defined.
Distilled water fulfills all the requirements. For this reason mix
coolant with distilled water when supplementing and refilling
the cooling system.
♦
Use only coolant additives according to the Parts Catalog. Us‐
ing other coolant additives can impair the corrosion protection.
Loss of coolant can cause considerable damage to the engine.
♦
Coolant in the correct mixing ratio prevents freezing and cor‐
rosion damage as well as scaling. The boiling temperature is
also increased. For these reasons the cooling system must
have coolant additive the whole year.
♦
Especially in countries with tropical climates or when vehicle
is driven under heavy engine load, the coolant improves the
engine reliability by its increased boiling point.
♦
The Refractometer - T10007A- MUST be used to determine
the actual freeze protection value.
♦
The freeze protection must be set to minimum -25 °C (-13 °F),
for countries with an arctic climate, it must be set to approxi‐
mately -36 °C (-32.8 °F). The freeze protection can be in‐
creased only when a stronger freeze protection is required due
to climatic conditions. But only down to -48 °C (-54 °F), other‐
wise the cooling effect of the coolant will be impaired.
♦
The coolant concentration must not be reduced by adding wa‐
ter, even during the warmer season or in warm countries. The
freeze protection must be a minimum of -25 °C (-13 °F).
♦
Read off the freeze protection value on the scale for each re‐
spective refilled coolant additive.
♦
The temperature on the Refractometer - T10007A- corre‐
sponds to the »crystallization point«. At this temperature, the
first flakes of ice begin to form in the coolant.
♦
Do not reuse used coolant.
♦
Only use water/coolant additive as lubricant for the coolant
hoses.
4.36.1 Freeze Protection, Checking and Add‐
ing Coolant Additive if Necessary
Special tools and workshop equipment required
Golf 2013 ➤ , Golf Sportsvan 2015 ➤ , Golf Variant 2014 ➤ , e-Golf 2014 ...
Maintenance - Edition 06.2015
4. Procedure Descriptions 107
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