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