Volkswagen Golf / Golf GTI / Jetta. Manual — part 63

19-15

Cooling
system,
draining and
filling

Special tools
and equipment

Not illustrated:

T10007

Refractometer

VAG1274/8

Adapter

VAG 1306

Drip tray

VAG 1331

Torque
wrench (5...50
Nm)

VAS 5024

Assembly tool
for spring-
type clips

VAS 6096

Coolant
system
charging unit

Cooling system components, servicing

19-16

Draining

- Open cap on coolant expansion

tank.

WARNING!

Steam can be released when
removing the cap from the
expansion tank. Cover the cap
with a cloth and open carefully.

- Remove center insulation tray:

Repair Manual, Body Exterior,

Repair Group 50

- Pull out lower coolant hose

retaining clip (arrow) and remove
coolant hose from radiator.

Cooling system components, servicing

19-17

Note:

Observe waste disposal regulations!

Filling

Note:

- To drain coolant from engine also

remove coolant hoses from oil
cooler (arrows).

Only use coolant additive G 12 in

accordance with TL VW 774 D.
Identification color: red

Under no circumstances must G

12 be mixed with other coolant
additives!

If the fluid in expansion tank is

brown, G 12 has been mixed
with another coolant. In this case
the coolant must be changed.

G 12 and coolant additives

marked "In accordance with TL
VW 774 D" prevent frost and
corrosion damage, scaling and
also raise the boiling point of
coolant. For this reason the
system must be filled all year
round with frost and corrosion
protection additives.

Because of its high boiling point,

the coolant improves engine
reliability under heavy loads,
particularly in countries with
tropical climates.

Cooling system components, servicing

19-18

Protection against frost must be assured to

approx. -25 C (in arctic climatic countries to
approx. -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 for climatic reasons a higher frost protection is

required, the amount of G 12 can be increased,
but only up to 60% (frost protection to about -40

C), as otherwise frost protection is reduced

again and cooling effectiveness is also reduced.

Refractometer T10007 is recommended for

determining the current density of the anti-
freeze.

If radiator, heat exchanger, cylinder head or

cylinder head gasket are replaced, do not reuse
old coolant.

Recommended mixture ratios:

Anti-freeze to Anti-freeze proportion G 12

1)

Water

1)2)

-25 C

-35 C

40%

50%

3.7 l

4.6 l

5.5 l

4.6 l

1)

The quantity of coolant can vary in accordance

with the equipment fitted to the vehicle.

2)

Only use clean drinking water.

Cooling system components, servicing