Volkswagen CJDA Workshop Manual page 302

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Caution
Only distilled water may be mixed with G12 plus-plus. The
use of distilled water ensures optimum protection against
corrosion.
Note
◆ Use only coolant additive G 12 plus-plus in accordance with
TL VW 774 G.
◆ It is only permissible to use distilled water for mixing.
◆ Coolant additives marked "in accordance with TL VW 774 G"
prevent lime accretion, frost damage and corrosion. More-
over, the boiling temperature is raised. Therefore, the cool-
ing system must be filled all year round with coolant additive.
◆ Because of its higher boiling point, the coolant improves en-
gine reliability under heavy loads, particularly in countries
with tropical climates.
◆ Frost protection is required down to about -25°C (in coun-
tries with arctic climates: down to about -35°C).
◆ The coolant concentration must not be reduced by adding
water even in warmer seasons and in warmer countries. The
coolant additive concentration must be at least 40%.
◆ If a stronger anti-freeze mixture is necessary due to harsher
weather conditions, it can be increased using G 12 plus-
plus. It may be strengthened, however, only to 60% (anti-
freeze protection to about -40°C). Otherwise, the antifreeze
protection will be reduced again and the cooling effect will be
impaired.
◆ If radiator, heat exchanger, cylinder head or cylinder head
gasket is renewed, do not reuse old coolant.
◆ The refractometer -T10007- is recommended for determining
the current anti-freeze density.
Recommended mixture ratios
Frost protec- Anti-freeze
tion proportion
to
-25 °C
-35°C
1)
The quantity of coolant may vary depending upon equipment. Observe
specifications of machine manufacturer.
– Secure lower coolant hose to connecting piece of radiator.
286 Repair Group 19 - Cooling
G 12 plus-plus
1)
40 % 3.2 l
50 % 4.0 l
Distilled
1)
water
4.8 l
4.0 l