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Removing and installing coolant pump > < Draining coolant

Golf Mk5

Filling with coolant
Filling with coolant
  Caution
For mixing, only potable water may be used. Soiled water does not have the required quality to ensure the coolant's function.
  Note
t  In vehicles as of model year 2008, only G 12 plus-plus according to TL VW 774 G may be used as coolant additive.
t  For vehicles up to and including model year 2007 coolant additive G 12 plus according to TL VW 774 F and G 12 plus-plus according to TL VW 774 G can be used.
t  The coolant additive G 12 plus-plus can be mixed with the previous coolant additive G 12 plus. Identification: both are coloured purple.
t  Coolant additives marked „according to TL VW 774 G“ or „according to TL VW 774 F“ prevent frost and corrosion damage, 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 for climatic reasons greater frost protection is required, the amount of coolant additive can be increased, but only up to 60 % (frost protection to about -40 °C). Otherwise frost protection and cooling effectiveness are reduced again.
t  The refractometer -T10007- is recommended for determining the current anti-freeze concentration.
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 plus1)
G 12 plus-plus1)		Water1) 2)
-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.
2) Only use clean tap water.
–  Reconnect hose and connector
–  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 to upper marking of shaded field on expansion tank.
–  Fit expansion tank cap.
Vehicles with no auxiliary heater
–  Start engine and maintain an engine speed of about 2000 rpm for about 3 minutes.
–  Run engine until radiator fan -V7- cuts-in.
From heater coolant shut-off valve -N279-
  Caution
The auxiliary heater must only be switched on when the coolant circuit is filled, described as follows:
  N19-0343
–  Connect Vehicle diagnosis, testing and information system -VAS 5051 A- as follows:
–  Push diagnosis cable connector onto diagnosis connection in driver footwell.
–  Start engine and maintain an engine speed of about 2000 rpm for about 3 minutes.
–  Press buttons on display for „Vehicle self-diagnosis“, „18 - Auxiliary heater“ and „Final control diagnosis“ one after the other.
–  Press right arrow button on display up to final control diagnosis for heater coolant shut-off valve -N279-.
–  Initiate final control diagnosis for heater coolant shut-off valve -N279-. Continue to maintain engine speed at approx. 2000 rpm for about 1 minute.
–  Run engine until radiator fan -V7- cuts-in.
Continuation for all vehicles
  WARNING
Steam may escape when expansion tank is opened. Wear eye protection and protective clothing to avoid eye injuries and scalding. Cover cap with cloth and open carefully.
–  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 shaded field.
  N01-0590

Removing and installing coolant pump > < Draining coolant