COOLING SYSTEM ON-VEHICLE INSPECTION


  1. INSPECT COOLING SYSTEM

    CAUTION:

    Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


    1. Fill the radiator 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 to 118 kPa (1.2 kgf/cm2, 17.1 psi), and check that the pressure does not drop.

      Tech Tips

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

  2. INSPECT ENGINE COOLANT LEVEL


    1. Check that the engine coolant level is between the LOW and FULL lines when the engine is cold. If the engine coolant is low, check for leaks 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 to the FULL line.

      Note

      Do not substitute plain water for engine coolant.

  3. INSPECT ENGINE COOLANT QUALITY


    1. Remove the radiator cap.

      CAUTION:

      Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

    2. Check if there is any excessive deposits of rust or scale around the radiator cap and radiator filler hole. The coolant should be free from oil.

      Tech Tips

      If excessively dirty, clean the coolant passage and the coolant.

    3. Install the radiator cap.

  4. INSPECT FINS FOR BLOCKAGE


    1. A01BAQH

      Check that the radiator and condenser are not blocked with leaves, dirt, or insects. Clean the hose connection. If the fins are clogged, wash them with water or a steam cleaner and dry with compressed air.

      Note


      • If the distance between the steam cleaner and the core is too close, there is a possibility of damaging the fins, so keep the following injection distance.

        Injection Pressures

        kPa (kg/cm2, psi)

        Injection Distance

        mm (in.)

        2,942 to 4,903

        (30 to 50, 427 to 711)

        		 300 (11.811)

        4,903 to 7,845

        (50 to 80, 711 to 1,138)

        		 500 (19.685)

      • If the fins are bent, straighten them with a screwdriver or pliers.

      • Never apply water directly onto the electronic components.