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Volkswagen Workshop Service and Repair Manuals

Removing and installing radiator > < Coolant hose schematic diagram
Draining and filling coolant
   
Draining and filling coolant
Special tools and workshop equipment required
t  Refractometer -T10007-
t  Spring-type clip pliers -VAS 5024A-
t  Cooling system charge unit -VAS 6096-

Draining
  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.
–  Remove engine cover.
–  Open filler cap on coolant expansion tank.
–  Remove noise insulation tray: → General body repairs, exterior; Rep. gr.50
   
–  To drain coolant from radiator, unscrew drain plug -arrow- from radiator.
  Note
Observe environmental regulations for disposal.
Filling
  Note
t  Use only coolant additive G12 plus in accordance with „TL VW 774 F“. Identification: purple colour.
t  G12 plus conforming with „TL VW 774 F“ can be mixed with the previous coolant additive G12 red!
t  G12 plus and coolant additives marked conforming 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 frost and corrosion protection additives.
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 G 12 can be increased, but only up to 60 % (frost protection to about -40 °C). Otherwise frost protection and cooling effectiveness are reduced again.
t  If radiator, heat exchanger, cylinder head or cylinder head gasket is renewed, do not reuse old coolant.
Recommended mixture ratios:
  A10-0118
Frost protection
to
Amount of anti-freezeG 12 → RemarkWater → Remark
-25 °C
-35 °C
40 %
50 %
2.4 l
3.0 l
3.6 l
3.0 l

1)  The quantity of coolant can vary depending upon vehicle equipment.
   
–  Screw drain plug into radiator.
With cooling system charge unit -VAS 6096-
–  Fill coolant circuit using cooling system charge unit -VAS 6096- → Operating instructions for cooling system charge unit 6096.
Without cooling system charge unit -VAS 6096-
  A10-0118
–  Fill with coolant up to max. marking on expansion tank.
With or without cooling system charge unit -VAS 6096-
–  Fit expansion tank cap.
–  Turn off heater controls.
–  Start engine and maintain an engine speed of about 2,000 rpm for about 3 minutes.
–  Run engine until radiator fan cuts in.
  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 on the max. mark; when the engine is cold, between the min. and max. marks.
  N19-0347

Removing and installing radiator > < Coolant hose schematic diagram