Checking oil pressure

WARNING: Engine oil is toxic.

→ 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 from hot oil!

→ Engine oil and components of the oil circuit can become very hot!

→ Allow engine and components to cool down.

→ Avoid contact with the skin and eyes.

→ Wear suitable protective clothing.

WARNING: Oil is combustible!

→ 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.

NOTE:

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.

NOTE:

The oil pressure switch is located in the oil filter housing/engine support arm.

NOTE:

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

Fig 1: Oil pressure sender

Courtesy of PORSCHE OF NORTH AMERICA, INC.

2. Use adapter insert 4 and tighten by hand with suitable sealing ring instead of oil pressure sender/switch.

Fig 2: Pressure gauge

Courtesy of PORSCHE OF NORTH AMERICA, INC.

3. Connect pressure gauge to hose.

NOTE:

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.

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

Engine speed [rpm]	Oil pressure [bar]
600	1.0
2000	3.0 to 5.5
> 2000	up to max. 7.0 If an oil pressure of more than 7 bar is reached, further diagnostics is necessary => Pressure relief valve in oil pump may be faulty => Replace oil pump

NOTE:

5. Remove pressure gauge with test hose. Collect the emerging engine oil and dispose of it in accordance with the applicable national laws.

Fig 3: Oil pressure sender

Courtesy of PORSCHE OF NORTH AMERICA, INC.