RADIATOR INSPECTION


  1. INSPECT RADIATOR CAP SUB-ASSEMBLY

    Note


    • If the radiator cap sub-assembly is contaminated, rinse it with water.


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


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


    1. A0137TIE02

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

      Pumping speed
      1 push/3 seconds or more

      Note

      Push the pump at a constant speed.


      • If air does not come from the vacuum valve, replace the radiator cap sub-assembly.

    2. Pump the tester and measure the relief valve opening pressure.

      Pumping speed
      1 push within 1 second

      Note

      The above pumping speed is for the first pumping only (in order to close the vacuum valve). After the first pumping, the pumping speed can be reduced.

      Standard opening pressure
      93 to 123 kpa (0.95 to 1.25 kgf*cm2, 13.5 to 17.8 psi)
      Minimum opening pressure
      78 kpa (0.8 kgf*cm2, 11.4 psi)

      • If the opening pressure is less than the minimum, replace the radiator cap sub-assembly.

        Tech Tips

        Use the tester's maximum reading as opening pressure.