Impreza WRX Wagon F4-2.0L DOHC Turbo (2002)
Engine Oil Pressure: Testing and Inspection
INSPECTION
1. Remove the oil pressure switch from engine cylinder block.
2. Connect the oil pressure gauge hose to cylinder block.
3. Connect the battery ground terminal to battery.
4. Start the engine, and measure oil pressure.
Oil pressure:
98 kPa (1.0 kg/cm2, 14 psi) or more at 800 rpm
294 kPa (3.0 kg/cm2, 43 psi) or more at 5,000 rpm
CAUTION:
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If the oil pressure is out of specification, check oil pump, oil filter and lubrication line.
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If the oil pressure warning light is turned ON and oil pressure is in specification, replace the oil pressure switch.
NOTE: The specified data is based on an engine oil temperature of 80°C (176°F).
5. After measuring the oil pressure, install the oil pressure switch.
Tightening torque: 25 Nm (2.5 kgf-m, 18.1 ft. lbs.)