Checking Radiator Cap

WARNING: This page is about a different car, the 2004 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

Pull radiator cap negative-pressure valve to open it, and make sure it close completely when released.
- Make sure there is no dirt or damage on valve seat of radiator cap negative-pressure valve.
- Make sure there is no unusualness in the opening and closing conditions of radiator cap negative-pressure valve.
  
  Fig 1: Displaying Radiator Cap
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check radiator cap relief pressure.
1. Standard
2. 78 - 98 kPa (0.8 - 1.0 kg/cm ², 11 - 14 psi)
1. Limit
2. 59 kPa (0.6 kg/cm ², 9 psi)
- When connecting radiator cap to radiator cap tester adapter (SST) and radiator cap tester (commercial service tool), apply engine coolant to the cap seal part.
- Replace radiator cap if there is an unusualness in radiator cap negative-pressure valve, or if the open-valve pressure is outside of the standard values.
  
  Fig 2: Displaying Radiator Cap Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.