COOLING SYSTEM


  1. OUTLINE


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

    2. An electric engine water pump assembly is used to reduce friction losses and weight.

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

    4. Warm water from the cylinder head sub-assembly is sent to the throttle body to prevent throttle body assembly icing (ice buildup), and at the same time is also sent to the EGR cooler assembly to cool down the EGR gas.

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

    6. TOYOTA genuine Super Long Life Coolant (SLLC) is used.

      A01UX9DE02
      Text in Illustration
      *1 Engine Water Pump Assembly *2 Thermostat
      *3 Engine Drain Cock Plug *4 Throttle with Motor Body Assembly
      *5 EGR Cooler Assembly *6 EGR Valve Assembly
      *a From Heater Radiator Unit Sub-assembly *b To Heater Radiator Unit Sub-assembly
      *c To Radiator Assembly *d From Radiator Assembly

  2. SPECIFICATION


    1. Engine Coolant


      1. TOYOTA genuine SLLC is used. The maintenance interval is as shown in the table below:

        Coolant Type TOYOTA Genuine SLLC or the Following*
        Maintenance Intervals First Time 160000 km (100000 miles)
        Subsequent Every 80000 km (50000 miles)
        Capacity 4.54 liters (4.80 US qts, 3.99 Imp. qts)
        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. SLLC is pre-mixed (50 % coolant and 50 % deionized water), so no dilution is needed when adding or replacing SLLC.

    2. Thermostat

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