Volkswagen Golf 2015 Repair Manual page 227

Note
The water portion of the coolant influences the effectiveness
♦
of the coolant. Based on the contents, the country or even the
region specific quality can be different. Use distilled water. For
this reason, we recommend using distilled water when adding
coolant or filling coolant for the first time.
Use only coolant additives listed in the Parts Catalog. Other
♦
coolant additives may above all reduce the corrosion protec‐
tion effect significantly. The damage resulting from this may
lead to loss of coolant and consequently to severe engine
damage.
Coolant with the correct mixture ratio prevents freezing and
♦
corrosion damage and calcium deposits. The boiling point will
be raised. The cooling system must be filled with coolant ad‐
ditive year-round.
Because of its high boiling point, the coolant contributes to
♦
engine reliability under heavy loads, particularly in countries
with tropical climates.
The Refractometer - T10007A- MUST be used to determine
♦
the freeze protection value.
Protection against frost must be assured down to minimum -25
♦
°C (-13 °F) (in arctic climatic countries down to approximately
-36 °C (-33 °F)). When stronger freeze protection is needed
due to the climate, the freeze protection may be increased. But
only down to -48 °C (-54 °F), otherwise the effectiveness of
the coolant decreases.
The coolant concentration must not be reduced by adding wa‐
♦
ter even in warmer seasons and in warmer countries. The frost
protection must be at least -25 °C (-13 °F).
Read the freeze protection value on the scale for the coolant
♦
additive that has been added.
The temperature on the Refractometer - T10007A- corre‐
♦
sponds to the »freezing point«. At this temperature, ice crys‐
tals may begin to form in the coolant.
Do not reuse used coolant.
♦
Only use water/coolant additive to lubricate the coolant hoses.
♦
Coolant Mixture Ratio
Frost Protection Portion of Cool‐
To ant Additive
-25 °C
-36 °C (-13 °F
-32.8 °F)
1)
The amount of coolant may vary depending on vehicle equip‐
ment.
• Coolant. Refer to the Parts Catalog.
Procedure
Engine Mechanical, Fuel Injection and Ignition - Edition 04.2015
Coolant Ad‐
1)
ditive
40 % 3.2L
50 % 4.0L
Golf 2015 ➤ , Golf Variant 2015 ➤
Distilled
1)
Water
4.8L
4.0L
219
1. Cooling System/Coolant