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Engine oil > < Removing and installing oil filter housing

A4 Cabriolet Mk2

Checking oil pressure and oil pressure switch
   
Checking oil pressure and oil pressure switch
Special tools and workshop equipment required
t  Oil pressure tester -V.A.G 1342-
t  Voltage tester -V.A.G 1527 B-
t  Auxiliary measuring set -V.A.G 1594 C-

Test conditions
l  Oil level OK
l  Engine oil temperature at least 80°C (radiator fan must have run once)
   
Test sequence
–  Lift off engine cover -arrows-.
  A10-0974
–  Unbolt coolant expansion tank -arrow-.
–  Unplug electrical wire for coolant shortage indicator switch -F66- at bottom of expansion tank and move expansion tank to one side with coolant hoses -1- and -2- attached.
  A19-10068
–  Unplug electrical connector at oil pressure switch -F1-.
–  Unscrew oil pressure switch -F1-.
–  Connect oil pressure tester -V.A.G 1342- to threaded hole for oil pressure switch.
–  Screw oil pressure switch -2- into oil pressure tester -V.A.G 1342-.
Checking oil pressure switch
–  Connect brown wire -1- of oil pressure tester to earth (–).
–  Connect voltage tester -V.A.G 1527 B- with test leads from auxiliary measuring set -V.A.G 1594 C- to oil pressure switch and battery positive (+).
l  LED should not light up.
If the LED lights up:
–  Renew oil pressure switch.
–  Start engine.
  Note
Observe tester and LED while starting, as switching point of oil pressure switch may already be exceeded when starting.
l  LED should light up at 1.2 ... 1.6 bar.
If LED does not light up:
–  Renew oil pressure switch.
Checking oil pressure
–  Start engine.
l  Minimum oil pressure at idling speed: 2.0 bar
l  Minimum oil pressure at 2000 rpm: 2.7 ... 4.5 bar.
Assembling
Installation is carried out in the reverse order; note the following:
  Note
Renew seal when installing oil pressure switch.
Tightening torque
  A17-0025
ComponentNm
Oil pressure switch to oil filter housing20

   

Engine oil > < Removing and installing oil filter housing