COOLING SYSTEM GENERAL


  1. OUTLINE


    1. The cooling system is a pressurized, forced-circulation type. The reservoir tank is not pressurized.

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

    3. A water pump swirl chamber and a thermostat housing have been placed in the timing chain cover to achieve a simpler construction and a compact engine.

    4. A 3-stage temperature-controlled coupling fan, which uses the same bimetal that is used on the conventional models, controls the fan speed in 3 stages to improve cooling performance and reduce cooling fan noise.

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

      A01EZD6E01
      Text in Illustration
      *1 Thermostat *2 Radiator Assembly
      *3 Water Pump Assembly *4 Water Bypass Pipe
      *a To Heater Core *b From Heater Core

  2. SPECIFICATION


    1. Engine Coolant


      1. Toyota Genuine SLLC is used. The maintenance intervals are as shown in the table below:

        Engine Coolant Type Toyota Genuine 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 (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids). Do not use plain water alone.
        Maintenance Intervals First Time 160000 km (100000 miles)
        Subsequent Every 80000 km (50000 miles)
        Color Pink

        Tech Tips

        SLLC is pre-mixed (40% coolant and 60% deionized water). Therefore, no dilution is needed when SLLC in the vehicle is added or replaced.

    2. Thermostat

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