Engine Oil Pressure: Testing and Inspection

Oil Pressure and Oil Pressure Switch, Checking

Special tools, testers and auxiliary items required

• Oil Pressure Gauge (V.A.G 1342) with adapter (V.A.G 1342/14)

• Voltage Tester (V.A.G 1527 B)

• Connector Test Set (V.A.G 1594 C)

Test Conditions

• Oil level OK

• Engine oil temperature approximately 90 °C (radiator fan must start up once).

Test Sequence

- Open the quick-release fasteners - arrows - and remove the engine cover.





- Remove coolant expansion tank - arrow -.





- Disconnect electrical wire from Engine Coolant Level (ECL) Warning Switch (F66) at bottom of coolant reservoir and set aside coolant reservoir with coolant hoses - 1 - and - 2 - connected.

- Disconnect electrical harness connector from Oil Pressure Switch (F1).

- Remove Oil Pressure Switch (F1) - arrow -.





- Connect Oil Pressure Gauge (V.A.G 1342) with adapter (V.A.G 1342/14) to hole for oil pressure switch.





- Screw oil pressure switch - 2 - into Oil Pressure Gauge (V.A.G 1342).

- Place the brown wire of oil pressure gauge on Ground (GND).

Oil Pressure Switch, Checking

- Connect Voltage Tester (V.A.G 1527 B ) - 1 - with adapter cables from Connector Test Kit (V.A.G 1594 C) to oil pressure switch and battery positive.

• LED must not light up.

If LED lights up:

- Replace Oil Pressure Switch.

- Start engine.

• While starting the engine, watch Pressure Tester and LED as oil pressure switch may open during start.

• At 1.2 to 1.6 bar pressure, the LED must light up.

If LED does not light up:

- Replace Oil Pressure Switch.

Oil Pressure, Checking

- Start engine.

• Oil pressure at 2000 RPM: Min. 1.3 bar.

• Oil pressure at 3500 RPM: Min. 3.5 to 4.5 bar.

If the specifications are not obtained: Check-valve or oil pump malfunctioning.

Assembling

Assembly is in reverse order of removal, note the following:

• Replace sealing ring when installing oil pressure switch.

Tightening Specifications