COOLING SYSTEM


  1. OUTLINE


    1. The cooling system uses a pressurized forced circulation system with a pressurized reservoir tank.

    2. A sub radiator assembly is used to ensure sufficient cooling performance for the high output engine.

    3. A sealed type radiator reserve tank assembly is used. In addition, the coolant flow volume is increased to correspond to the heat radiation needs of the engine.

    4. An engine coolant distribution pathway is provided between the left and right banks of the cylinder block sub-assembly.

    5. A thermostat with a bypass valve is located in the plastic water inlet housing to maintain suitable temperature distribution in the cooling system.

    6. A cooling fan control system in which the ECM optimally controls the cooling fan speed is used.

    7. Toyota Genuine Super Long-Life Coolant (SLLC) is used.

      A004D7OC01
      *1 Engine Water Pump Assembly *2 Water Inlet with Thermostat Sub-assembly
      *3 Radiator Reserve Tank Assembly *4 Radiator Assembly
      *5 Sub Radiator Assembly *6 ATF Warmer (Oil Cooler Assembly)
      *7 Oil Cooler Assembly - -
      *a To Heater Radiator Unit Sub-assembly *b From Heater Radiator Unit Sub-assembly

  2. SPECIFICATION


    1. Engine Coolant


      1. TOYOTA genuine Super Long Life Coolant (SLLC) is used. The maintenance interval is as shown in the table below.

      2. SLLC is pre-mixed (50% coolant and 50% deionized water), so no dilution is needed when adding or replacing SLLC.

        Type TOYOTA Genuine SLLC or equivalent*
        Maintenance Intervals First Time 160000 km (100000 miles)
        Subsequent Every 80000 km (50000 miles)
        Color Pink

        Tech Tips

        *: Similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology. (Coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids.)

    2. Thermostat

      Thermostat Opening Temperature 80 to 84°C (176 to 183°F)