AUDI A4 1998 B5 / 1.G APB Engine Cooling System Components
								
                                
                
                
                Manufacturer: AUDI, Model Year: 1998,
                  Model line: A4,
                  Model: AUDI A4 1998 B5 / 1.G
                
                
                 Pages: 34, PDF Size: 0.64 MB
                    
                							
              
              
  
                
              
              
    
        
         
         
  
                                   
  AUDI A4 1998 B5 / 1.G APB Engine Cooling System Components
  A4 1998 B5 / 1.G
  AUDI
  AUDI
  https://www.carmanualsonline.info/img/6/961/w960_961-0.png
  AUDI A4 1998 B5 / 1.G APB Engine Cooling System Components
            
        
  
 
Trending: coolant, check oil, heater, ECU, coolant level, fuel, wheel
Page 1 of 34
19-1
 
     
Cooling system components, 
removing and installing 
     
WARNING! 
     
Hot steam can escape from the expansion 
tank when the filler cap is opened. Cover the 
filler cap with a cloth and unscrew it carefully. 
     
Notes:  
     
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. 
     Hoses are secured with spring-type clips. When 
repairing only use spring-type clips. 
     VAG 1921 pliers are recommended when 
installing spring-type clips. 
     The O-rings fitted at the quick-release 
connections must be replaceed if damaged or 
leaking. 
     When installing coolant hoses, ensure that they 
are free of stress and do not come into contact 
with other components (observe markings on 
coolant connection and hose). 
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        Page 2 of 34
      Perform leak test on cooling system with cooling 
system tester VAG 1274 and adapter VAG 
1274/8.  
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        Page 3 of 34
19-2
      
Cooling system components (on body), 
removing and installing
 
     
Notes:  
     
Parts of cooling system on engine   Page 19
-
8 . 
     
Diagram of coolant hose connections   Page 19
-17
 . 
     
Draining and filling with coolant   Page 19
-
19
 . 
     
Coolant mixture ratios   Page 19
-19
 , draining 
and filling cooling system. 
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        Page 4 of 34
19-3
 
  
1 - 
Radiator 
Removing and installing   Page 19
-26
After replacing, replace coolant in complete 
system 
2 - 
Securing clip 
3 - 
Securing rubber 
4 - 
O-ring Replace if damaged
5 - 
Bottom coolant hose Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections   
Page 19
-17
 
6 - 
Rubber washer 
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        Page 5 of 34
19-4
 
  
7 - 
Retaining bolt 
8 - 
Nut 
Tightening torque: 10 Nm
9 - 
Fan ring Clipped into air ducting and secured with 
retaining bolt -Item 7 - 
10 - 
2-pin connector 
11 - 
Radiator fan (-V7-) 
12 - 
Connector Black, 3-pinFor radiator fan thermoswitch
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        Page 6 of 34
19-5
 
  
13 - 
Radiator fan thermoswitch (-F18-), 35 Nm 
For electric fan
  Switching temperatures: Stage 1on: 92...97 Coff: 84...91 C
  Switching temperatures: Stage 2
on: 99...105 Coff: 91...98 C
14 - 
Seal 
Always replace
15 - 
Drain screw Tightening torque: 10 Nm
16 - 
Top coolant hose Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections   
Page 19
-17
 
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        Page 7 of 34
19-6
 
  
17 - 
Bolt 
Tightening torque: 5 Nm
18 - 
Mounting rod 
19 - 
Guard plate 
20 - 
Bolt Tightening torque: 5 Nm
21 - 
Bolt Tightening torque: 5 Nm
22 - 
Radiator Removing and installing   Page 19
-26
After replacing, replace coolant in complete 
system 
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        Page 8 of 34
19-7
 
  
23 - 
Nut 
Tightening torque: 5 Nm
24 - 
Bracket 
25 - 
Fan ring 
26 - 
Pressurizing fan 
27 - 
Bolt Tightening torque: 5 Nm
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        Page 9 of 34
19-8
 
  
Cooling system components (on engine, 
front), removing and installing
 
1 - 
Connection 
For thermostat
2 - 
O-ring Always replace
3 - 
Thermostat Checking: heat the thermostat in waterStarts to open at about 86 COpening travel: at least 7 mm
4 - 
Bolt Tightening torque: 10 Nm
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        Page 10 of 34
19-9
 
  
5 - 
Filler cap 
Test with cooling system tester VAG 1274 
and adapter VAG 1274/9 Test pressure 1.4...1.6 bar
6 - 
O-ring Replace if damaged
7 - 
Bolt Tightening torque: 10 Nm
8 - 
Expansion tank Carry out leak test of cooling system with 
cooling system tester VAG 1274 and 
adapter VAG 1274/8 
9 - 
To rear water line Diagram of coolant hose connections   
Page 19
-17
 
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Trending: oil, steering wheel, wheel torque, oil additives, coolant capacity, tow, belt