COOLING SYSTEM


  1. OUTLINE


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

    2. The pressurized reserve tank is used to prevent the engine coolant from deteriorating upon contact with external air.

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

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

    5. A water-cooled type engine oil cooler is used.

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

      Figure 1. Models with Catalyst Support Control

      B0020G9C01
      *A Models for Cold Area - -
      *1 Radiator Reserve Tank Assembly *2 Radiator Assembly
      *3 Compressor Inlet Elbow *4 Turbocharger Sub-assembly
      *5 Turbo Water Pipe Sub-assembly *6 Water Inlet
      *7 Thermostat *8 Oil Cooler Assembly
      *9 Diesel Throttle Body Assembly *10 No. 2 EGR Valve Assembly
      *11 EGR Pipe with Cooler Sub-assembly *12 Electric EGR Control Valve Assembly
      *13 No. 1 EGR Cooler *14 No. 1 Injector Holder
      *15 Water Outlet - -

      Figure 2. Models without Catalyst Support Control

      A01WBU3C01
      *A Models for EGR Cooler *B Models for Cold Area
      *1 Radiator Reserve Tank Assembly *2 Radiator Assembly
      *3 Turbocharger Sub-assembly *4 Turbo Water Pipe Sub-assembly
      *5 Water Inlet *6 Thermostat
      *7 Oil Cooler Assembly *8 Diesel Throttle Body Assembly
      *9 No. 2 EGR Valve Assembly *10 Electric EGR Control Valve Assembly
      *11 No. 1 EGR Cooler *12 Water Outlet

  2. SPECIFICATION


    1. Engine Coolant

      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 (50% coolant and 50% 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)