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Checking cooling system for leaks > < Draining coolant

Golf Mk6

Filling with coolant
Filling with coolant
  Caution
Only distilled water may be mixed with G12 plus-plus. The use of distilled water ensures optimum protection against corrosion.
  Note
t  When renewing expansion tank and during service operations, ensure that 2 silicate cartridges → Electronic parts catalogue are always in expansion tank. The silicate cartridges must not be removed.
t  Use only coolant additive G 12 plus-plus in accordance with TL VW 774 G.
t  Coolant additives marked „Conforming to TL VW 774 FG“ prevent frost and corrosion damage and scaling and also raise boiling point of coolant. Therefore, the cooling system must be filled all year round with coolant additive.
t  Because of its higher boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.
t  Frost protection is required down to about -25°C (in countries with arctic climates: down to about -35°C).
t  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%.
t  If greater frost protection is required for climatic reasons, the proportion of coolant additive can be increased, but only up to 60 % (frost protection down to approx. -40 °C). Otherwise, the antifreeze protection will be reduced again and the cooling effect will be impaired.
t  The refractometer -T10007 A- is recommended for determining the current anti-freeze density.
t  If radiator, heat exchanger, cylinder head or cylinder head gasket is renewed, do not reuse old coolant.
Recommended mixture ratios:
   
Frost protection
to		Anti-freeze
proportion		G 12 plus-plus 1)Distilled water 1)
-25°C
-35°C		40%
50%		3.2 l
4.0 l		4.8 l
4.0 l

1) The quantity of coolant can vary depending upon the vehicle equipment.
Carry out the following work:
–  Install noise insulation → General body repairs, exterior; Rep. gr.50.
With cooling system charge unit -VAS 6096-:
–  Screw adapter for cooling system tester -V.A.G 1274/8- onto expansion tank.
–  Fill coolant circuit using cooling system charge unit -VAS 6096- → Operating instructions for cooling system charge unit VAS 6096.
Without cooling system charge unit -VAS 6096-:
   
–  Slowly fill coolant in up to upper marking of hatched field on expansion tank.
–  Fit expansion tank cap.
–  Start engine and increase engine speed to approx. 2000 rpm for approx. 3 minutes.
–  Run engine until radiator fan -V7- cuts in.
  WARNING
When the engine is warm, the cooling system is under pressure.
Hot steam/hot coolant can escape - risk of scalding.
Cover filler cap on expansion tank with a cloth and open carefully to dissipate pressure.
–  Check coolant level and top-up if necessary. When the engine is at normal operating temperature, the coolant level must be at the upper mark; when the engine is cold, in the middle of the hatched field.
  A19-0480

Checking cooling system for leaks > < Draining coolant