COOLING SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

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

PROCEDURE


  1. INSPECT FOR COOLANT LEAK (for Engine)

    Note

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


    1. A0007XR

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

    2. Put the engine in inspection mode Click here.

    3. Warm up the engine.

    4. Using a radiator cap tester, increase the pressure inside the radiator assembly to 118 kPa (1.2 kgf/cm2, 17 psi), and check that the pressure does not drop.

      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 and cylinder head.

  2. INSPECT COOLANT LEVEL IN RESERVOIR (for Engine)


    1. Check that the coolant level is between the low and full lines when the engine is cold.

      If the coolant level is low, check for leaks and add "TOYOTA Super Long Life Coolant" 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 coolant.

  3. INSPECT COOLANT QUALITY (for Engine)


    1. Remove the radiator cap sub-assembly.

    2. Check if there are any excessive deposits of rust or scale around the radiator cap sub-assembly and radiator filler hole. Also, the coolant should be free of oil.

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

    3. Install the radiator cap sub-assembly.