engine oil AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual

19-7

Filling

Note:

The cooling system is filled all year round with a
mixture of water and an antifreeze/corrosion
protection agent.
Only use coolant additive G 012 A8 D meeting
specification TL VW 774 D. Identification color:
red

CAUTION!

G 012 A8 D and other coolant additives
cannot be mixed. Otherwise, serious damage
to the engine may result.
If the fluid in the expansion tank is brown, this
means G 012 A8 D has been mixed with
another type of coolant. In this case, flush out
the cooling system and fill with fresh coolant. To
flush the system, fill it with clean water and run
the engine for about 2 minutes. This should
remove as much of the old coolant as possible.
G 012 A8 D and coolant additives marked
"meeting specification TL VW 774 D" prevent
frost and corrosion damage and stop scaling
while at the same time raising the boiling point
of the coolant. For these reasons the cooling
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19-8

Because of its high boiling point, the coolant
improves engine reliability under heavy loads,
particularly in countries with tropical climates.
Protection against frost must be assured to
about -25 C (in arctic climatic countries to
about -35 C).

The coolant concentration must not be reduced
by adding water, even in warmer seasons and
in warmer countries. The anti-freeze ratio must
be at least 40 %.
If greater frost protection is required in very cold
climates, the amount of G 012 A8 D can be
increased, but only up to 60% (this gives frost
protection to about -40 C). Otherwise, frost
protection is reduced again and cooling
effectiveness is also reduced.

Only use clean drinking water for mixing the
coolant.
If radiator, heat exchanger, cylinder head or
cylinder head gasket is replaced, do not reuse
old coolant.
Use special tool T10007 to check frost
protection of coolant additive G012 A8 D in
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