Oil Pressure Sender: Service and Repair

WM 170419 Removing and installing oil-pressure sender

Preliminary work

Information

If vehicles have fault entries relating to oil pressure, oil pump activation, oil pressure monitoring, etc. in the DME control unit (and a warning light comes "on" on the instrument cluster), proceed as follows:

- Check the oil level.

- Delete related faults.

- Do not replace components, such as the oil pump, oil pressure sensor or oil pressure control valve if you suspect that they are faulty.

If the vehicle has not been driven for a long time (months), the control mechanism in the oil pump can become stiff ("stick").

Very short trips and a lot of loading/maneuvering can cause the oil to become very diluted => Oil pressure very low. For example, 20 cold starts in quick succession can reduce the viscosity of the engine oil by 30%.

- Change the engine oil. Test-drive the vehicle.

- If error messages/warnings are displayed again, proceed in accordance with the instructions under Guided Fault Finding in the PIWIS Tester.

1. Remove engine guard. -> 108019 Removing and installing engine guard - section on "Removing" 108019 Removing and installing engine guard

Removing oil-pressure sender

WARNING

Toxic substances

- Danger of poisoning or suffocation

-> Ventilate the work area well.
-> Never ingest or inhale.
-> Read specific information on the Hazard Sheet.
-> Wear personal protective gear.

WARNING

Hot fluid

- Danger of scalding

-> Let the fluid cool down.
-> Wear personal protective gear.

WARNING

Highly inflammable or explosive materials

- Danger of fire or explosion

-> Avoid contact with hot parts or sources of ignition.
-> Use suction to remove ignitable vapours.
-> Attach warning sign in a clearly visible position.

Information

- The oil pressure may be too low for a number of reasons:

- Oil is diluted.

- Oil pump is faulty.

- Bearing clearance is too large (e.g. crankshaft bearing)

- Oil level is too low.

- Oil pressure regulating valve is faulty.

- Incorrect oil has been used. Use only oil that has been approved by Porsche for the measurement.

Information

- When the oil pressure switch is unscrewed, approx. 0.3 litres of engine oil escapes.

Component overview of oil-pressure sender





Component overview of oil-pressure sender





1. Release and pull off connector on oil-pressure sender.
2. Unscrew fastening screws -4- and remove oil-pressure sender -3-. The adapter is removed as well.

Installing oil-pressure sender

Information

- The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

Component overview of oil-pressure sender





Component overview of oil-pressure sender





1. Replace sealing rings for adapter and oil-pressure sender.
2. Slide oil-pressure sender -3- into the adapter -1-.
3. Fit the fastening screws -4-.
4. Plug in connector for oil-pressure sender.

Subsequent work

1. Install engine guard. -> 108019 Removing and installing engine guard - section on "Installing" 108019 Removing and installing engine guard
2. Check the oil level and top up if necessary.