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Home >> Nissan-Datsun >> 2008 >> Sentra SE-R >> Repair and Diagnosis >> Engine Mechanical >> Engine Lubrication System (Qr25DE) >> Engine Oil >> Inspection >> Oil Pressure Check

Oil Pressure Check

WARNING:
  • Be careful not to burn yourself, as engine oil may be hot.
  • For M/T models, put the gearshift lever in the Neutral "N" position. For CVT models, put the selector lever in the Park "P" position.
  1. Check engine oil level. Refer to "OIL LEVEL ".
  2. Remove undercover using power tool.
  3. Disconnect oil pressure sensor harness connector at oil pressure sensor, and remove oil pressure sensor.
    CAUTION: Do not drop or shock oil pressure sensor.
  4. Start engine and warm it up to normal operating temperature.
  5. Check oil pressure with engine running under no-load, using Tool

    Tool numbers : ST25051001 (J-25695-1) 

    : ST25052000 (J-25695-2) 

    NOTE: When engine oil temperature is low, engine oil pressure becomes high.
    Fig 1: Identifying Oil Pressure Gauge
    G04899908Courtesy of NISSAN MOTOR CO., U.S.A.

    Engine oil pressure [Oil temperature 80°C (176°F)] 

    ENGINE OIL PRESSURE REFERENCE

    Engine speed (rpm) Idle speed 2,000 6,000
    Engine pressure kPa (kg/cm2 , psi) Approx. 98 (1.0, 14) or more Approx. 294 (3.0, 43) or more Approx. 392 (4.0, 57) or more

    If difference is extreme, check oil passage and oil pump for oil leaks. 

  6. After the inspections, install oil pressure sensor as follows:
  1. Remove old liquid gasket adhering to oil pressure sensor and engine.
  2. Apply liquid gasket and tighten oil pressure sensor to the specification.

    Use Genuine RTV Silicone Sealant or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".

    Oil pressure sensor torque : 14.7 N.m (1.5 kg-m, 11 ft-lb) 

  3. After warming up engine, make sure there is no leakage of engine oil with running engine.
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