Checking Radiator Cap

WARNING: This page is about a different car, the 2003 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.

To check radiator cap, apply pressure to cap with a tester.

Fig 1: Checking Radiator Cap

Courtesy of NISSAN MOTOR CO., U.S.A.

Radiator cap relief pressure:
1. Standard
  1. 78 - 98 kPa
    1. (0.8 - 1.0 kg/cm ² , 11 - 14 psi)
2. Limit
  1. 59 kPa
    1. (0.6 kg/cm ² , 9 psi)

Pull the negative pressure valve to open it. Check that it closes completely when released.

Fig 2: Opening Negative Pressure Valve

Courtesy of NISSAN MOTOR CO., U.S.A.