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Home >> Infiniti >> 2003 >> QX4 4WD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Engine Cooling System >> Water Control Valve >> Inspection

Water Control Valve: Inspection

  1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
  2. Check valve opening temperature and maximum valve lift.
    Fig 1: Displaying Water Control Valve Specifications
    G02208428Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Then check if valve closes at 5°C (9°F) below valve opening temperature.
    Fig 2: Testing Water Control Valve In Hot Water
    G02208429Courtesy of NISSAN MOTOR CO., U.S.A.
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