coolant level AUDI A4 1997 B5 / 1.G APB Engine Cooling System Components
Page 27 of 34
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-  Start engine and let it idle for about 10 
minutes. 
     
-  Maintain an engine speed of about 2000 RPM 
for about 5 minutes. 
     
-  Allow engine to run at idling speed until bottom 
hose on radiator becomes hot. 
     
-  Check coolant level and top up if necessary. 
When engine is at normal operating temperature 
coolant level must be on max. mark, and 
between min. and max. marks when engine is 
cold. 
     
Note:  
     When the engine is hot the cooling system is 
under pressure. Carefully open filler cap on 
expansion tank to release pressure before 
starting repair work. 
     
WARNING! 
     
Hot steam can escape from the expansion 
tank when the filler cap is opened. Cover the 
filler cap with a cloth and remove it carefully. 
Pa
ge 27 of 34 Coolin
g system com
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