Engine Oil Pressure: Inspection

Disconnect the ground cable from battery. Ref. to NOTE>NOTE>BATTERY .
Remove the oil pressure switch. Ref. to LUBRICATION(H4DO)>Oil Pressure Switch>REMOVAL .
Install the oil pressure gauge to the chain cover.

Fig 1: Installing Oil Pressure Gauge To Chain Cover
Courtesy of SUBARU OF AMERICA, INC.
Connect the battery ground terminal. Ref. to NOTE>NOTE>BATTERY .
Start the engine, and check the oil pressure.
NOTE:
- Standard value is based on an engine oil temperature of 80°C (176°F).
- If the oil pressure is out of specification, check oil pump, oil filter and lubrication line. Ref. to LUBRICATION(H4DO)>Engine Lubrication System Trouble in General>INSPECTION .
- If the oil pressure warning light is ON and oil pressure is within standard, check the oil pressure switch. Ref. to LUBRICATION(H4DO)>Engine Lubrication System Trouble in General>INSPECTION .
Engine oil pressure:

While idling (no load and select lever in "P" or "N" range)

Standard

65 kPa (0.7 kg/cm² , 9 psi) or more (at 3,000 r/min)

324 kPa (3.3 kg/cm² , 47 psi) or more
After inspection, install the related parts in the reverse order of removal.