Checking Radiator Cap

WARNING: This page is about a different variant/trim than selected.

Inspect the radiator cap.
- Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
- Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer.
  NOTE: Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
  
  Fig 1: Applying Pressure To Cooling System With Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
Pull the negative pressure valve to open it and check that it closes completely when released.
- Check that there is no dirt or damage on the valve seat of the radiator cap negative-pressure valve.
- Check that there are no abnormalities in the opening and closing conditions of the negative-pressure valve.
  
  Fig 2: Pulling Negative Pressure Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check radiator cap, apply pressure to cap using Tool.

Fig 3: Checking Radiator Cap
Courtesy of NISSAN MOTOR CO., U.S.A.

Radiator cap relief pressure

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

Limit : 59 kPa (0.6 kg/cm