Engine Oil Pressure: Testing and Inspection

Oil pressure and oil pressure switch, checking





Special tools and equipment
^ V.A.G 1342 with V.A.G 1342/14
^ V.A.G 1527 B
^ V.A.G 1594 A

Requirements:
^ Oil level OK
^ Engine oil temperature approximately 90°

Work sequence





- Remove rear engine cover (arrows).





- Disconnect connector (arrow) at oil pressure switch.
- Remove oil pressure switch.





- Connect oil pressure tester VAG 1342 with adapter 1342/14 to hole for oil pressure switch.
- Screw oil pressure switch -2- into V.A.G 1342.

Checking oil pressure switch
- Connect brown wire -1- of tester to ground (GND)
- Connect voltage tester VAG 1527 B with test leads from VAG 1594 A to oil pressure switch and battery positive
^ LED must not light
- If LED lights, replace oil pressure switch.
- Start engine.

Note: Observe tester and LED on starting, as switching point of oil pressure switch may already be exceeded when starting.

^ LED must light at 1.2 to 1.6 bar
- If LED does not light, replace oil pressure switch.

Checking oil pressure
- Start engine (engine oil temperature approximately 90°C).
^ Oil pressure at 2000 rpm: min. 2.0 bar
^ Oil pressure at 3500 rpm: min. 3.5 bar
^ Oil pressure at higher engine speed: max. 4.0 bar

If readings do not match specifications:
- Pressure relief valve/oil pump is faulty, replace oil pump.

Note: Replace oil seal on installing oil pressure switch.





Tightening torque