Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE MECHANICAL (H6DO))ENGINE OIL PRESSUREINSPECTION

2016 Subaru Legacy 2.5i

Engine Oil Pressure: Inspection

2016 Subaru Legacy 2.5iSECTION Inspection

WARNING: This page is about a different variant/trim than selected.

Disconnect the ground terminal from battery sensor. < Ref. to BATTERY , NOTE, Repair Contents. >
Remove the oil pressure switch from the oil pan upper. < Ref. to REMOVAL , Oil Pressure Switch. >
Attach the oil pressure gauge to the oil pan upper.

Fig 1: Identifying Oil Pressure Gauge
Courtesy of SUBARU OF AMERICA, INC.
Connect the ground terminal to battery sensor. < Ref. to BATTERY , NOTE, Repair Contents. >
Refill the engine oil. < Ref. to REPLACEMENT , Engine Oil. >
Start the engine, and check the oil pressure.
NOTE:
- If the oil pressure is out of specification, check oil pump, oil filter and lubrication line. < Ref. to ENGINE LUBRICATION SYSTEM TROUBLE IN GENERAL . >
- If the oil pressure warning light is ON and oil pressure is within specification, check the oil pressure switch. < Ref. to OIL PRESSURE SYSTEM . > < Ref. to OIL PRESSURE SWITCH . >
Engine oil pressure (at oil temperature of 80°C (176°F)):

Standard

100 kPa (1.0 kg/cm ² , 15 psi) or more (at 700 r/min)

500 kPa (5.1 kg/cm ² , 73 psi) or more (at 5, 000 r/min)
After inspection, install the related parts in the reverse order of removal.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.