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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Lubrication System - 3.5 L) >> Engine Oil >> Inspection >> Oil Pressure Check

Oil Pressure Check

WARNING: This page is about a different variant/trim than selected.
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 A/T models, put the selector lever in the Park "P" position.
  1. Check the oil level.
  2. Disconnect oil pressure switch harness connector.
  3. Remove oil pressure switch.
  4. Install the pressure gauge.
  5. Start the engine and warm it up to normal operating temperature.
  6. Check oil pressure with engine running under no-load.
    Fig 1: Identifying Oil Pressure Gauge
    G02883957Courtesy of NISSAN MOTOR CO., U.S.A.
    ENGINE SPEED RPM AND APPROXIMATE DISCHARGE PRESSURE KPA (KG/CM

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

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

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

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

      Oil pressure switch : 13 - 17 N.m (1.25 - 1.75 kg.m, 9 - 12 ft.lb)