1997 AUDI A8 radiator cap

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Page 13 of 40

AUDI A8 1997 D2 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-11
      
Cooling system, draining and refilling
 
     
Draining  
     
WARNING! 
     
The cooling system is pressurized when the 
engine is warm. When opening the expansion 
tank, wear gloves a

Page 19 of 40

AUDI A8 1997 D2 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-16
      
-  Raise engine speed to approx. 2000 rpm for 
approx. 5 minutes. 
     
-  Allow engine to idle until lower coolant hose on 
radiator is hot. 
     
-  Check coolant level and top-off if