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Home >> Infiniti >> 2004 >> FX45 >> Repair and Diagnosis >> Engine Mechanical >> Engine Lubrication System >> Engine Oil >> Inspection >> Oil Pressure Check
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Oil Pressure Check

WARNING:
  • Be careful not to burn yourself, as engine oil may be hot.
  • Oil pressure check should be done in "Parking position".
  1. Check engine oil level. Refer to ENGINE OIL LEVEL  .
  2. Remove front engine undercover with power tool.
  3. Disconnect oil pressure switch harness connector.
  4. Remove oil pressure switch.
    Fig 1: Locating Oil Pressure Switch
    G02398472Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install oil pressure gauge and hose (SST).
    Fig 2: Locating Special Service Tool
    G02398473Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Start engine and warm it up to normal operating temperature.
  7. Check oil pressure with engine running under no-load.
    NOTE: When engine oil temperature is low, engine oil pressure becomes high.

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

    ENGINE OIL PRESSURE SPECIFICATION

    Engine Speed (RPM) Approximate Discharge Pressure [kPa (kg/cm2, psi)]
    Idle Speed More Than 98 (1.0, 14)
    2,000 More Than 294 (3.0, 43)

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

  8. After the inspections, install oil pressure switch as follows
    1. Remove old liquid gasket adhering to oil presser switch and engine.
    2. Apply liquid gasket and tighten oil pressure switch to specification.

      Use Genuine Thread Sealant or equivalent. Refer to  RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS  . 

      1. Torque: 14.8 N.m (1.5 kg-m, 11 ft-lb) 
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