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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2 (ENGINE COOLING SYSTEM (VK45DE))RADIATORCHECKING RADIATOR CAP
2006 Infiniti FX35 AWD

Checking Radiator Cap

2006 Infiniti FX35 AWDSECTION Checking Radiator Cap
WARNING: This page is about a different car, the 2006 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.
  • Check valve seat of radiator cap.
    • Check if valve seat is swollen to the extent that the edge of the plunger cannot be seen when watching it vertically from the top.
    • Check if valve seat has no soil and damage.
      Fig 1: Identifying Valve Seat Of Radiator Cap
      G04073592Courtesy of NISSAN MOTOR CO., U.S.A.
  • Pull negative-pressure valve to open it, and make sure that it close completely when released.
    • Make sure that there is no dirt or damage on the valve seat of radiator cap negative-pressure valve.
    • Make sure that there are no unusualness in the opening and closing conditions of negative-pressure valve.
      Fig 2: Testing Radiator Cap Negative Pressure Valve
      G04073593Courtesy of NISSAN MOTOR CO., U.S.A.
  • Check radiator cap relief pressure.
    Fig 3: Checking Radiator Cap Relief Pressure
    G04073594Courtesy of NISSAN MOTOR CO., U.S.A.

    Standard : 78 - 98 kPa (0.8 - 1.0 kg/cm 2  , 11 - 14 psi) 

    Limit : 59 kPa (0.6 kg/cm 2  , 9 psi) 

    • When connecting radiator cap to the radiator cap tester adapter (SST) and the radiator cap tester (Commercial service tool), apply engine coolant to the cap seal surface.
  • Replace radiator cap if there is an unusualness.
CAUTION: When installing a radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.