COOLING SYSTEM ON-VEHICLE INSPECTION


  1. INSPECT FOR COOLANT LEAK

    CAUTION:

    Do not remove the radiator cap sub-assembly while the engine assembly and radiator assembly are still hot. Hot, pressurized engine coolant and steam may be released and cause serious burns.


    1. Fill the radiator assembly with coolant and attach a radiator cap tester to the radiator.

    2. Warm up the engine.

    3. Using a radiator cap tester, increase the pressure inside the radiator assembly to 137 kPa (1.4 kgf/cm2, 19.9 psi), and check that the pressure does not drop.

      Tech Tips

      If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leaks. If no external leaks are found, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.

  2. INSPECT ENGINE COOLANT LEVEL

    A003FFY

    1. The engine coolant should be between the LOW and FULL lines when the engine is cold.

      If low, check for leakage and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology up to the FULL line.

  3. INSPECT ENGINE COOLANT QUALITY


    1. Remove the radiator cap sub-assembly.

      CAUTION:

      To avoid the danger of being burned, do not remove the radiator reserve tank cap while the engine and radiator are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator.

    2. Check for any excessive deposits of rust or scale around the radiator reserve tank cap and radiator filler hole. The coolant should be free of oil.

      If excessively dirty, replace the coolant.

    3. Reinstall the radiator cap sub-assembly.