coolant AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual A4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/931/w960_931-0.png AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual

Page 1 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-1
 
     
Cooling system components, 
removing and installing 
     
WARNING! 
     
Hot steam can escape when opening the cap 
on the expansion tank: Cover the cap with a 
cloth and open carefully

Page 3 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-2
 
  
Cooling system diagram
 
1 - 
Radiator 
Removing and installing   Page 19
-26
After replacing, fill with fresh coolant
2 - 
Upper coolant line 
3 - 
Thermostat Removing and installing coolan

Page 4 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-3
 
  
6 - 
Cylinder head/cylinder block 
After replacing, fill with fresh coolant
7 - 
Heating system heat exchanger After replacing, fill with fresh coolant
8 - 
Lower coolant line Removing and i

Page 6 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-5
      
Draining  
     
Note:  
     Catch drained off coolant in a clean container for 
re-use or disposal. 
     
WARNING! 
     
Hot steam can escape when opening the cap 
on the expansion tan

Page 7 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-6
      
Note:  
    
With bumper and air duct in front of charge air cooler removed, the 
coolant can also be drained from the radiator via the drain screw -arrow-. 
If necessary use an auxiliary

Page 8 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-7
      
Filling  
     
Note:  
     
The cooling system is filled all year round with a 
mixture of water and an antifreeze/corrosion 
protection agent. 
     Only use coolant additive G 012 A8 D

Page 10 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-8
      
Because of its high boiling point, the coolant 
improves engine reliability under heavy loads, 
particularly in countries with tropical climates. 
     Protection against frost must be ass

Page 12 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-9
      
Recommended mixture ratios:  
     
Frost 
protection 
to  
Anti-freeze 
concentration  
G 
012A8 
D 1)  
Water
1)  
-25 C  
-35 C  
40%  
50%  3.0 l  
3.5 l  4.0 l  
3.5 l  
     
1) Cool

Page 13 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-10
 
    
-  Remove seal from plenum chamber cover in direction of arrow.
-  Remove plenum chamber cover -1- from front.
-  Push back protective cover for coolant hose at connection of heat 
exchan

Page 14 of 38

AUDI A4 1998 B5 / 1.G AWM Engine Cooling System Components Workshop Manual 19-11
      
-  Start engine and maintain an engine speed of 
about 2000 rpm for approx. 3 minutes. 
     
-  Allow engine to run at idling speed until lower 
hose on radiator becomes hot. 
     
WARN
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