RADIATOR ON-VEHICLE INSPECTION


  1. RADIATOR CAP SUB-ASSEMBLY

    CAUTION:

    To avoid the danger or being burned, do not remove the radiator cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.


    1. A01KGFME01
      Text in Illustration
      *a 30°or more
      *1 Radiator Cap
      *2 Radiator Cap Tester

      Inspect the radiator cap.

      Note


      • If the radiator cap has contaminations, always rinse it with water.


      • Before using a radiator cap tester, wet the relief valve and pressure valve with engine coolant or water.


      • When performing steps (a) and (b) below, keep the tester at an angle of over 30°above the horizontal.

    2. Using a radiator cap tester, slowly pump the tester and check that air is coming from the vacuum valve.

      Pump speed
      1 push/(3 seconds or more)

      Note

      Push the pump at a constant speed.

      If air is not coming from the vacuum valve, replace the radiator cap.

    3. Pump the radiator cap tester, and measure the relief valve opening pressure.

      Pump speed
      1 push within 1 second

      Note

      1 push within 1 second

      If air is not coming from the vacuum valve, replace the radiator cap.

    4. Pump the radiator cap tester, and measure the relief valve opening pressure.

      Pump speed
      1 push within 1 second

      Note

      This pump speed is for the first pump only (in order to close the vacuum valve). After this, the pump speed can be reduced.

      Standerd opening pressure
      93 - 123 kPa (0.95 - 1.25 kgf/cm2, 13.5 - 17.1 psi)
      Minimum opening pressure
      78 kPa (0.8 kgf/cm2, 11.4 psi)

      Tech Tips

      Use the tester's maximum reading as the opening pressure. If the opening pressure is less than minimum, replace the radiator cap.