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Home >> Infiniti >> 2007 >> QX56 AWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Lubrication System >> Engine Oil >> Inspection >> Oil Pressure Check

Oil Pressure Check

CAUTION:
  • Be careful not to burn yourself, as engine oil may be hot.
  • Put the selector lever in the Park "P" position.
  1. Check the engine oil level. Refer to "OIL LEVEL ".
  2. Remove engine front undercover using power tool.
  3. Disconnect the oil pressure switch harness connector.
  4. Remove the oil pressure switch.
    Fig 1: Identifying Oil Pressure Switch
    G04899907Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install Tools.

    Tool number : ST25051001 (J-25695-1) 

    : ST25052000 (J-25695-2) 

    Fig 2: Identifying Oil Pressure Gauge
    G04899908Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Start the engine and warm it up to normal operating temperature.
  7. Check the engine oil pressure with engine running under no-load.

    Engine oil pressure [Engine oil temperature at 80°C (175°F)]

    ENGINE OIL TEMPERATURE REFERENCE CHART

    Unit: kPa (kg/cm2 , psi)
    Engine Speed Approximate Discharge Pressure
    Idle speed More than 98 (1.0, 14)
    2,000 rpm More than 294 (3.0, 43)
    CAUTION: If the difference is extreme, check the oil passages and oil pump for leaks and blockages.
  8. After the inspections, install oil pressure switch as follows:
    1. Remove old liquid gasket adhering to oil pressure switch and engine.
    2. Apply liquid gasket and tighten oil pressure switch 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 engine running.
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