radiator AUDI A4 1997 B5 / 1.G APB Engine Cooling System Components
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A4, Model: AUDI A4 1997 B5 / 1.GPages: 34, PDF Size: 0.64 MB
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 11 of 34

19-10
 
  
10 - 
Top coolant hose 
Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections   
Page 19
-17
 
11 - 
Coolant line 
Diagram of coolant hose connections   
Page 19
-17
 
12 - 
Rear toothed belt guard 
13 - 
Gasket 
Always replace
14 - 
Coolant pump Check that pump runs freelyIf damaged or leaking replace completeRemoving and installing   Page 19
-29
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Page 13 of 34

19-12
 
  
23 - 
Bolt 
Tightening torque: 10 Nm
24 - 
Fan wheel for viscous fan 
25 - 
Viscous fan coupling Note left-hand threadTightening torque only applicable when 
using open-end spanner 3312 Tighten to 37 Nm
26 - 
Bolt Tightening torque: 25 Nm
27 - 
Bracket For viscous fan
28 - 
From bottom of radiator Diagram of coolant hose connections   
Page 19
-17
 
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Page 18 of 34

19-17
 
  
Coolant hose connections, diagram
 
1 - 
Bottom coolant hose 
From radiator to engine
2 - 
Cylinder head/ cylinder block 
3 - 
Right turbocharger 
4 - 
Auxiliary water pump 
5 - 
Heat exchanger for heater system 
6 - 
Coolant hose To heat exchanger
7 - 
Left turbocharger 
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Page 19 of 34

19-18
 
  
8 - 
Rear coolant line 
9 - 
Cap for expansion tank 
10 - 
Expansion tank 
11 - 
Oil cooler 
12 - 
Radiator 
Removing and installing   Page 19
-26
After replacing, replace coolant in complete 
system 
13 - 
Coolant pump 
14 - 
Connection For thermostat
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Page 20 of 34

19-19
      
Cooling system, draining and filling
 
     
Draining  
     
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. 
     
-  Remove filler cap on coolant expansion tank. 
    
-  Remove noise insulation panel.
-  Place drip tray VAG 1306 under the engine. 
    
-  If bumper has been removed from vehicle, open drain tap -arrow- on 
bottom of radiator (left side) by turning anti-clockwise. Fit drain hose on 
connection if necessary. 
-  If bumper has not been removed from vehicle, pull out retaining clip on 
bottom hose going from radiator to engine (right side), and pull hose off 
radiator. 
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Page 23 of 34

19-22
      
The coolant concentration should not be 
reduced by adding plain water, even in warmer 
seasons and in warmer countries. The 
concentration must be at least 40 %. 
     If extra antifreeze protection is required in cold 
climates, the concentration of G 12 can be 
increased, but only up to a maximum of 60 % 
(frost protection to about -40 C); if this 
concentration is exceeded, the antifreeze 
protection will be reduced again and cooling 
effectiveness will also be impaired. 
     
Do not reuse the old coolant if the radiator, heat 
exchanger, cylinder head or cylinder head 
gasket have been replaced. 
      Recommended mixture ratios:  
     
Frost 
protection 
to  Antifreeze 
concentration  G 
12
1)  Water
1)  
-25 C  
-35 C  
40 %  
50 %  2.5 
ltr.  
3.0 
ltr.  3.5 ltr.  
3.0 ltr.  
     
1) The capacity of the cooling system can vary 
depending on the equipment installed on the 
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