Coolant Replacement

Engine Hybrid System. Corolla. Zre142 Aze141
2Az-Fe Cooling. Corolla. Zre142 Aze141

  1. DRAIN ENGINE COOLANT

  2. ADD ENGINE COOLANT

  3. INSPECT FOR COOLANT LEAK

Coolant -- Replacement



1. DRAIN ENGINE COOLANT

  1. Loosen the lower radiator drain cock plug.

    CAUTION:
    Do not loosen the lower radiator drain cock plug while the engine and radiator are still hot.
    Pressurized, hot engine coolant and steam may be released and cause serious burns.
    HINT:
    Collect the coolant in a container and dispose of it according to the regulations in your area.

  1. Remove the radiator cap.



  1. Loosen the cylinder block drain cock plug.


    Corolla. Zre142 Aze141.2Az-Fe Cooling.Cooling System.Coolant Replacement



2. ADD ENGINE COOLANT

  1. Tighten the lower radiator drain cock plug.

  1. Tighten the cylinder block drain cock plug.

    Torque:
    13 N*m{130 kgf*cm, 9 ft.*lbf}

  1. Loosen the upper radiator drain cock plug.

  1. Slowly fill the radiator with TOYOTA Super Long Life Coolant (SLLC).

    Standard Capacity:
    Item
    		Capacity
    Engine coolant
    		5.7 liters (6.0 US qts, 5.0 lmp. qts)
    HINT:
    1. TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).
    2. Contact your TOYOTA dealer for further details.
    NOTICE:
    Never use water as a substitute for engine coolant.

  1. Squeeze the inlet and outlet radiator hoses several times by hand, and then check the level of the coolant.
    If the coolant level is low, add coolant.

  1. Tighten the upper radiator drain cock plug.

  1. Slowly pour coolant into the radiator reservoir tank until it reaches the FULL line.

  1. Install the radiator cap sub-assembly and reservoir tank cap.

  1. Start the engine and warm it up.

  1. Bleed air from the cooling system.

    NOTICE:
    1. Before starting the engine, turn the A/C switch off.
    2. Adjust the air conditioning temperature setting to MAX (HOT).
    3. Adjust the air conditioning blower setting to LO.

    1. Warm up the engine until the thermostat opens. While the thermostat is open, allow the coolant to circulate for several minutes.

      HINT:
      Thermostat opening timing can be determined by squeezing the inlet radiator hose, and sensing vibrations when the engine coolant starts to flow inside the hose.
      CAUTION:
      When squeezing the radiator hoses:
      1. Wear protective gloves.
      2. Be careful as the radiator hoses are hot.
      3. Keep your hands away from the radiator fan.

  1. Stop the engine, and wait until the engine coolant cools down.

  1. Add engine coolant to the FULL line on the radiator reservoir.



3. INSPECT FOR COOLANT LEAK


Corolla. Zre142 Aze141
CAUTION:
To avoid the danger of being burned, do not remove the radiator cap sub-assembly 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.

  1. Fill the radiator assembly with engine coolant, then attach a radiator cap tester.

  1. Pump the tester to 118 kPa (1.2 kgf/cm2, 17.1 psi), then check that the pressure does not drop.
    If the pressure drops, check the hoses, radiator assembly and water pump assembly for leakage. If there are no signs or traces of external engine coolant leakage, check the heater core, cylinder block and head.