Radiator hose AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/987/w960_987-0.png AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual

Page 3 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-2
 
  
Cooling system components (on body)
 
1 - 
Radiator 
Removing and installing   page 19
-17
After replacing, completely replace coolantWith ATF cooler on vehicles with automatic 
transmission

Page 6 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-4
 
  
16 - 
Upper coolant hose 
Secured to radiator with retaining clipMake sure hose is securely seatedCoolant hose connection diagram   page 19
-9 
Pa
ge 6 of 40 Coolin
g system com
ponents, rem

Page 9 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-7
 
  
14 - 
O-ring 
Replace if damaged
15 - 
Expansion tank Check using VAG1274 cooling system 
tester with VAG1274/9 adapter 
16 - 
Upper coolant hose Secured to radiator with retaining clipMake

Page 10 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-8
 
  
21 - 
Lower coolant line 
Coolant hose connection diagram   page 19
-9 
22 - 
Oil cooler 
23 - 
Belt pulley 
For viscous fan
24 - 
Fan wheel for viscous fan 
25 - 
Viscous fan coupling Note

Page 11 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-9
 
  
Coolant hose connection diagram
 
1 - 
Lower coolant hose 
From radiator to engine
2 - 
Cylinder head/cylinder block 
3 - 
Intake manifold 
4 - 
Coolant line From heat exchanger to engine bl

Page 12 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-10
 
  
9 - 
Oil cooler 
10 - 
Coolant line 
From expansion tank to lower coolant pipe
11 - 
Upper coolant hose 
12 - 
Radiator 
13 - 
Coolant pump 
14 - 
Lower coolant line 
15 - 
Connection For t

Page 13 of 40

AUDI A4 1999 B5 / 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 14 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual CAUTION! 
Follow disposal regulations for coolant.  hose (from radiator to engine) and disconnect radiator hose from 
radiator. 
Pa
ge 14 of 40 Coolin
g system com
ponents, removin
g and installin
g
1

Page 17 of 40

AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual 19-14
      
-  Replace coolant drain plug O-ring and install 
coolant drain plug into engine. 
     
   Tightening torque: 20 Nm (15 ft lb).
     
-  Install lower right coolant hose and secure with

Page 19 of 40

AUDI A4 1999 B5 / 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
Page:   1-10 11-20 next >