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Engine cooling > < Removing and installing oil pump

Octavia Mk2

Testing oil pressure and oil pressure switch
Testing oil pressure and oil pressure switch
Special tools and workshop equipment required
t  Oil pressure tester, e.g. -V.A.G 1342-
t  Voltage tester, e. g. -V.A.G 1527 B-
t  Measuring tool set, e.g. -V.A.G 1594 C-
  Note
Observe safety measures and rules for cleanliness when working on vehicles with liquefied petroleum gas system (LPG) → Chapter.
Test conditions
l  Engine oil level o.k., test → BookletOctavia ll.
l  Engine oil temperature approx. 80 C.
  Note
Functional test and repair of the visual and acoustic oil pressure display → Vehicle diagnostic tester.
Test sequence
–  Remove oil pressure switch -F1- and screw into oil pressure tester.
   
–  Screw the oil pressure tester into the hole for the oil pressure switch.
  A17-0025
Testing oil pressure switch
–  Connect brown cable -1- of oil pressure tester to earth (-).
–  Unclamp the voltage tester with its auxiliary cables out of the measuring tool set on the oil pressure switch and plus (+) terminal of the battery.
l  The LED should not light up.
If the LED lights up:
–  Replace oil pressure switch.
–  Start the engine.
  Note
Observe the testing equipment and the LED while actuating the starter since the switching point of the oil pressure switch can already be exceeded when starting up.
l  The LED must come on at an overpressure of 0.12 to 0.16 MPa (1.2 to 1.6 bar).
If the LED does not light up:
–  Replace oil pressure switch.
Testing oil pressure
–  Start engine (engine oil temperature about 80 °C).
l  Oil pressure when engine idling: at least 0,12 MPa (1,2 bar).
l  Oil pressure at 2000 rpm: 0.27...0.45 MPa (2.7... 4.5 bar).
If the specified values are not reached:
–  Replace the oil filter holder with the pressure relief valve → Itemor the oil pump → Chapter.
At a higher engine speed the oil pressure must not be greater than 0.7 MPa (7.0 bar).
If the specified pressure is exceeded:
–  Inspect oil galleries.
–  Replace the oil filter with the pressure relief valve as required.
–  Replace oil pump → Chapter.
  A17-0025

Engine cooling > < Removing and installing oil pump