ect AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual

AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual A6 1998 C5 / 2.G AUDI AUDI https://www.carmanualsonline.info/img/6/987/w960_987-0.png AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual

Page 1 of 40

AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual 19-1
 
     
Cooling system components, 
removing and installing 
     
WARNING! 
     
The cooling system is pressurized when the 
engine is warm. When opening the expansion 
tank, wear gloves and ot

Page 3 of 40

AUDI A6 1998 C5 / 2.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 4 of 40

AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual 19-3
 
  
7 - 
O-ring 
Replace if damaged
8 - 
Coolant Fan Control (FC) thermal switch -
F18- 35 Nm (26 ft lb)For electric coolant fan
  Switching temperatures, stage 1:On: 92-97 C (198-207 F)Off: 84-

Page 6 of 40

AUDI A6 1998 C5 / 2.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 7 of 40

AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual 19-5
 
  
Cooling system components (on engine)
 
1 - 
Connection 
For thermostat
2 - 
O-ring Always replace
3 - 
Coolant thermostat Removing and installing   page 19
-23
Note installation position

Page 8 of 40

AUDI A6 1998 C5 / 2.G AHA ATQ Engines Cooling System Components Workshop Manual 19-6
 
  
7 - 
Engine Coolant Temperature (ECT) sensor 
-G62- 
For Engine Control Module (ECM)If necessary, release pressure in cooling 
system before removing Checking   Repair Manual, 2.8 Liter V6

Page 9 of 40

AUDI A6 1998 C5 / 2.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 A6 1998 C5 / 2.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 A6 1998 C5 / 2.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 A6 1998 C5 / 2.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
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