COOLING SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Note

Before performing each inspection, turn the A/C switch off.

PROCEDURE


  1. INSPECT FOR COOLANT LEAK


    1. Remove the reservoir cap.

      CAUTION:

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

    2. Fill the radiator assembly with coolant, and then attach a radiator cap tester.

    3. Warm up the engine.

    4. Pump the radiator cap tester to 143 kPa (1.5 kgf/cm2, 20.7 psi), and then check that the pressure does not drop.

      If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leakage.

      If there are no signs of external coolant leaks, check the heater core, cylinder block and head.

    5. Reinstall the reservoir cap.

  2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR


    1. Check that the engine coolant is between the LOW and FULL lines when the engine is cold.

      If the level is low, check for leakage and add Toyota recommends the use of approved "Toyota Premium Long Life Coolant for 1WW/2WW engines" or equivalent up to the FULL line.

      Note

      Never use water as a substitute for engine coolant.

  3. INSPECT ENGINE COOLANT QUALITY


    1. Remove the reservoir cap.

      CAUTION:

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

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

      If excessively dirty, replace the coolant.

    3. Install the reservoir cap.