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Home >> Infiniti >> 2005 >> Q45 >> Repair and Diagnosis >> Engine Mechanical >> Engine Lubrication System >> Engine Oil >> Inspection >> Oil Pressure Check

Oil Pressure Check

WARNING:
  • Be careful not to burn yourself, as engine oil is hot.
  • Engine oil pressure check should be done in "Parking position".
  1. Check engine oil level. Refer to " ENGINE OIL LEVEL  "  .
  2. Remove engine undercover with power tool.
  3. Disconnect oil pressure switch harness connector.
  4. Remove oil pressure switch using the deep socket (commercial service tool).
    CAUTION: Do not drop or shock oil pressure switch.
    Fig 1: Identifying Oil Pressure Switch
    G02369132Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install oil pressure gauge and hose [SST].
    Fig 2: Identifying Oil Pressure Gauge And Hose Using SST
    G02369133Courtesy of NISSAN MOTOR CO., U.S.A.
  6. After warming up engine to normal operating temperature, make sure that engine oil pressure corresponding to the engine speed is produced.
    NOTE: When engine oil temperature is low, the engine oil pressure becomes high.

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

    ENGINE OIL PRESSURE TEMPERATURE

    Engine speed (rpm) Idle speed 2,000
    Oil pressure kPa (kg/cm2 , psi) 98 (1.0, 14) 294 (3.0, 43)

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

  7. After checking, install oil pressure switch as follows.
    1. Remove old liquid gasket adhering to oil pressure switch and engine.
    2. Apply thread sealant and tighten oil pressure switch to the specification.

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

      1. Oil pressure switch: 
      2. 14.8 N.m (1.5 kg-m, 11 ft-lb) 
    3. After warming up the engine, make sure there is no leaks of engine oil with running the engine.
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