engine AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual A4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/983/w960_983-0.png AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual

Page 4 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-4
      
Oil pump, removing
 
     
Note:  
     If irregular valvetrain noises occur and disappear 
after a lengthy drive, but always re-occur on 
short drives, replace the oil retention valves.

Page 7 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-6
 
  
Revised oil circulation system
 
Note: 
 
Modifications compared to previous 2.8 liter V6 
(Audi 90, Audi 100). 
 Only the modified components should be 
installed on this engine. 
1 - 
Oil

Page 9 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-8
 
  
Function of revised oil circulation  
Intake side 
Oil is taken in from the oil pump -6- via the oil pick-
up pipe -8-.  
Pressure side 
Oil pressure comes from the oil pump -6- through 
the

Page 10 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-9
      
Oil pressure and oil pressure switch, 
checking
 
      Operational test and servicing the visible and 
audible oil pressure indicator:  
     
       Electrical Wiring Diagrams, Troublesh

Page 12 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-10
      
-  Start engine and slowly increase engine speed 
(RPM). 
     
At 1.6-2.0 bar (23-29 psi) pressure, the LED 
must come on 
      If not:  
     
-  Replace 1.8 bar oil switch.
Pa
ge 12 o

Page 13 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-11
      
Operation of dynamic oil pressure 
warning system, checking
 
      Testing oil pressure warning light:  
      After ignition is switched on (terminal 15 on) with 
the engine not running

Page 15 of 15

AUDI A4 1998 B5 / 1.G AFC Engine Lubrication System Components Workshop Manual 17-12
      
Testing oil pressure  
    
Oil pressure specifications  -  Remove oil pressure switch and screw in VAG 1342 oil pressure 
gauge. 
   (The oil pressure sensor shown in the illustration is