Vauxhall Workshop Service and Repair Manuals > Astra J > Engine | Engine mechanics - 1.4L (LDD, LDU, LLU, LUH, LUJ) | Diagnostic Information and Procedures | Miscellaneous | Oil Pressure Diagnosis and Testing

Oil Pressure Diagnosis and Testing (1.4L LUH, LUJ and LUV)

•	EN-498-B Oil Pressure Gauge

•	EN-498-3 Adapter

For equivalent regional tools, refer to Special Tools .

1.	Disconnect the oil pressure indicator switch wiring harness plug.

2.	Remove the oil pressure indicator switch (1) and the oil pressure indicator switch seal ring (2).

1.	Install EN-498-B gauge (1) along with EN-498-3 adapter (2).

2.	Start Engine.

Note: The oil temperature should be between 80°C (176°F) and 100°C (212°) .

3.	Measure the oil pressure:

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The oil pressure at idle speed should be 150 kpa (22 psi) .

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The oil pressure between 3000 - 3500 rpm should be 380 - 650 kpa (55 - 94 psi) .

4.	Stop engine.

5.	If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:

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Oil suction gallery clogged or dirty. Refer to Oil Pan Cleaning and Inspection

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Cracked, porous, or restricted oil galleries.

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Oil pressure relief valve malfunction.

6.	Remove EN-498-B gauge and EN-498-3 adapter .

1.	Install the oil pressure indicator switch and a NEW oil pressure indicator switch seal ring.

Caution: Refer to Fastener Caution .

2.	Tighten the oil pressure indicator switch to 20 N·m (15 lb ft) .