AUDI A4 2000 B5 / 1.G AEB ATW Engines Exhaust System Components Owner's Manual
								
                                
                
                
                Manufacturer: AUDI, Model Year: 2000,
                  Model line: A4,
                  Model: AUDI A4 2000 B5 / 1.G
                
                
                 Pages: 35, PDF Size: 0.46 MB
                    
                							
              
              
  
                
              
              
    
        
         
         
  
                                   
  AUDI A4 2000 B5 / 1.G AEB ATW Engines Exhaust System Components Owner's Manual
  A4 2000 B5 / 1.G
  AUDI
  AUDI
  https://www.carmanualsonline.info/img/6/951/w960_951-0.png
  AUDI A4 2000 B5 / 1.G AEB ATW Engines Exhaust System Components Owner's Manual
            
        
  
 
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Page 21 of 35
26-16
      
All-wheel-drive vehicles 
    
-  Using VAG1523 saw, cut exhaust pipe at separating point (arrow) at 
right angle. 
-  When installing, center double clamp over separating point.
    
   Double clamp installation position: level with bolts in clamp -1- pointing 
toward left-rear wheel 
-  Install double clamp so that bolts don't project over lower edge of 
double clamp   Page 26
-13
 , Fig.   3
 . 
-  Align exhaust system free of stress   Page 26
-24
 .
-  Tighten double clamp bolts evenly to 40 Nm (30 ft lb).
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        Page 22 of 35
26-17
      
Exhaust manifold, removing and 
installing
 
     
Removing  
     
Note:  
     
Replace gaskets and self-locking nuts.
     Flexpipe in front exhaust pipe must not be bent 
more than 10 , otherwise it may be damaged. 
     
-  Remove air guide duct between cowl and air 
cleaner housing. 
     
-  Remove air cleaner housing cover.
    
-  Remove the following lines/harness connectors:
1 - At wastegate bypass regulator valve -N75-
2 - At Evaporative Emissions (EVAP) purge regulator valve -N80-
3 - At power output stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
-  Pull off hose connections and remove air cleaner housing (arrows).
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        Page 23 of 35
26-18
 
    
-  Remove noise insulation panel (arrows).
    
-  Unthread bolts -1- and -2- several turns.
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        Page 24 of 35
26-19
      
-  Remove engine covers. 
    
-  Unbolt crankcase ventilation hose -1- at cylinder head cover and heat 
shield. 
-  Unbolt both oil supply line bolts -2-.
-  Remove heat shield -3-. 
- Remove bolts -4-.
-  Remove seal between turbocharger and exhaust manifold.
-  Seal opening in turbocharger using clean cloth.
    
-  Remove all nuts (arrows) from exhaust manifold.
-  Remove washers and exhaust manifold.
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        Page 25 of 35
26-20
      
Installing  
      Installation is the reverse of removal, noting the 
following:  
     
-  Install in sequential order as follows:
     
 
Exhaust manifold to cylinder head
     
 Turbocharger to exhaust manifold
     
 Turbocharger bracket to cylinder block
     
Tightening torques  
     
Component  
Tightening 
torques  
Turbocharger bracket to 
turbocharger (bolt and washer 
assembly M8)  40 Nm (30 ft 
lb)  
Turbocharger bracket to cylinder 
block  45 Nm (33 ft 
lb)  
Turbocharger to exhaust 
manifold  35 Nm (26 ft 
lb)  
Exhaust manifold to cylinder 
head  25 Nm (18 ft 
lb)  
Oil supply line to cylinder head   20 Nm (15 ft 
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        Page 26 of 35
lb)  
Crankcase ventilation line to 
cylinder head  10 Nm (7 ft 
lb)  
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        Page 27 of 35
26-21
      
Three Way Catalytic Converter (TWC), 
removing and installing
 
     
Removing  
     
Note:  
     
Replace gaskets and self-locking nuts.
     Flexpipe in front exhaust pipe must not be bent 
more than 10 , otherwise it may be damaged. 
    
-  Disconnect harness connector for heated oxygen sensor (arrow) and 
set aside. 
    
Note:   -  Remove coolant expansion tank -2- (arrows)
-  Remove wiring from Engine Coolant Level (ECL) warning switch -F66- 
and lay coolant expansion tank to side. 
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        Page 28 of 35
Coolant hoses -1- and -3- remain connected. 
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        Page 29 of 35
26-22
      
-  Remove air guide duct between cowl and air 
cleaner housing. 
     
-  Remove air cleaner housing cover.
    
-  Remove the following lines/harness connectors:
1 - At wastegate bypass regulator valve -N75-
2 - At Evaporative Emissions (EVAP) purge regulator valve -N80-
3 - At power output stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
-  Pull off hose connections and remove air cleaner housing (arrows).
-  Remove Heated Oxygen Sensor (HO2S) from Three Way Catalytic 
Converter (TWC). 
-  Remove bolts between front exhaust pipe and Three Way Catalytic 
Converter (TWC). 
-  Unbolt transmission mount for exhaust system at exhaust system.
-  Remove bolts between three Three Way Catalytic Converter (TWC) 
and turbocharger. 
-  Remove Three Way Catalytic Converter (TWC) toward top.
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        Page 30 of 35
26-23
      
Installing  
      Installation is the reverse of removal, noting the 
following:  
     
 
Only grease threads of oxygen sensor with 
"G 052 112 A3." Do NOT allow grease to get 
into slots on sensor body. 
     
 Align exhaust system free of stress   Page 26
-24
 . 
     
Tightening torques  
     
Components  
Tightening 
torques  
Front exhaust pipe to three way 
catalytic converter  25 Nm (18 ft 
lb)  
Front exhaust pipe to 
transmission mount  25 Nm (18 ft 
lb)  
Three way catalytic converter to 
turbocharger  30 Nm (22 ft 
lb)  
Heated oxygen sensor to three 
way catalytic converter  50 Nm (37 ft 
lb)  
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Trending: tow, wiring, torque, coolant, oil, check engine, ignition