COOLING SYSTEM


  1. OUTLINE


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

    2. The exhaust heat recirculation system is used to recover heat from the exhaust system for S-class cold area specification models.

    3. The water pump is used on the timing chain cover assembly.

    4. A thermostat is located on the water inlet housing to maintain suitable temperature distribution in the cooling system.

    5. Warm water from the cylinder head sub-assembly is sent to the throttle body to prevent throttle body icing (ice buildup). At the same time, warm water from the cylinder head sub-assembly is also sent to the EGR valve to cool it down.

    6. An aluminum radiator core is used for weight reduction.

    7. The engine coolant uses TOYOTA genuine Super Long Life Coolant (SLLC).

      A005G78E02
      Text in Illustration
      *A Models with MT *B Models with CVT
      *1 Throttle Body *2 EGR Valve Assembly
      *3 Water Pump Assembly *4 Thermostat
      *5 from Radiator *6 from Heater Core
      *7 to Heater Core *8 to Radiator
      *9 Transmission Oil Cooler - -

  2. SPECIFICATION


    1. Engine Coolant


      1. TOYOTA genuine Super Long Life Coolant (SLLC) is used. 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 in the vehicle.

        Type TOYOTA Genuine SLLC or the 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)