Initial Inspection and Diagnostic Overview

WM 170301 Checking oil pressure





Tools and materials

Special tools





Oil-pressure gauge





Checking oil pressure

Warning:
Engine oil is toxic.
Danger of poisoning!

- Do not consume food or drink while working (danger of mixing).

- If swallowed, observe the warning information on the containers, contact a doctor if necessary and show the information on the containers.

Warning:
Danger of scalding with hot engine oil.

- Allow engine and components to cool down.

- Avoid contact with the skin and eyes.

- Wear suitable protective clothing.

Warning:
Oil is combustible!
Risk of fire due to oil and hot components (exhaust manifold, etc.)

- Do not pour engine oil over very hot components (e.g. turbocharger).

- Never place cloths soaked with oil on hot engine components.

- In case of fire, use CO2 or dry powder fire extinguishers.

Information:
The oil pressure may be too low for a number of reasons:
Oil is diluted (e.g. fuel gets into the oil due to too many cold starts without warming up the engine afterwards).
Oil pump is faulty.
Too much bearing clearance (e.g. crankshaft bearing).
Oil level is too low.
Oil pressure regulating valve is faulty.
Oil pressure sensor is faulty.
Incorrect oil has been used. Use only oil that has been approved by Porsche for the measurement.

Information:
The oil pressure switch is located on the oil-filter console to the right (in the direction of travel) under the generator.





Overview

1. Remove front engine guard.
2. Pull off connector on oil pressure sensor. To do this, press on the button.





Connector on oil pressure sensor

Information:
When the oil pressure switch is unscrewed, approx. 0.3 liters of engine oil escapes.

3. Loosen the oil pressure switch and unscrew it. Collect the emerging oil and dispose of it in accordance with the applicable national laws.





Unscrewing oil pressure switch

4. Screw in test adapter 4 with sealing ring in the oil-filter console and tighten by hand.
5. Connect pressure gauge on the hose and tighten it hand-tight.





Connecting pressure gauge

Information:
The oil temperature must range between 80°C and 100°C when performing the measurement.
Check the oil temperature using a special thermometer or the PST II tester.

6. Start the engine and move off at the required test speed. Read off the oil pressure on the pressure gauge when doing so.





Information:
When the pressure gauge is unscrewed, approx. 0.3 l of engine oil escapes.

7. Remove pressure gauge with test hose. Collect the emerging engine oil and dispose of it in accordance with the applicable national laws.
8. Install oil temperature switch with new sealing ring. - Tightening torque: 15 ftlb





Installing the oil pressure switch

9. Push electric connector onto oil pressure switch. The connector must engage audibly.





Pushing on electric connector

10. Install front engine guard.
11. Check oil level and correct if necessary.