1VD-FTV ENGINE


  1. General


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

    2. A pressurized reservoir 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 2-stage temperature-controlled coupling fan is used. It rotates at lower speeds when the engine is started to minimize fan noise.

    6. TOYOTA genuine Super Long Life Coolant (SLLC) is used as the engine coolant.

    7. To ensure reliability, a water jacket for cooling the EGR valves is provided in the No. 3 EGR pipe.*


      • *: Models compliant with EURO 5 emission regulations

      A01W794C02
      *A Models with Fuel Cooler Assembly *B Models with EGR Control
      *C Models Compliant with EURO 5 Emission Regulations - -
      *1 Radiator Reservoir Tank Assembly *2 Radiator Assembly
      *3 Oil Cooler Assembly *4 Engine Water Pump Assembly
      *5 Fuel Cooler Assembly *6 EGR Cooler Assembly
      *7 No. 3 EGR Pipe - -

      Figure 1. System Diagram (Except Models Compliant with EURO 5 Emission Regulations)

      A01W7BUC01
      *A Models with EGR Control *B Models with Viscous Clutch Heater with Magnet Assembly
      *1 Radiator Reservoir Tank Assembly *2 Radiator Assembly
      *3 Oil Cooler Assembly *4 Thermostat
      *5 Engine Water Pump Assembly *6 Cylinder Head Sub-assembly
      *7 Cylinder Block Sub-assembly *8 Fuel Cooler Assembly
      *9 EGR Valve Assembly *10 EGR Cooler Assembly
      *11 Viscous Clutch Heater with Magnet Assembly *12 Heater Radiator Unit Sub-assembly
      *13 Turbocharger Sub-assembly - -

      Figure 2. System Diagram (Models Compliant with EURO 5 Emission Regulations)

      A01W7W8C01
      *1 Radiator Reservoir Tank Assembly *2 Radiator Assembly
      *3 Oil Cooler Assembly *4 Thermostat
      *5 Engine Water Pump Assembly *6 Cylinder Head Sub-assembly
      *7 Cylinder Block Sub-assembly *8 No. 3 EGR pipe
      *9 EGR Valve Assembly *10 EGR Cooler Assembly
      *11 Viscous Clutch Heater with Magnet Assembly *12 Heater Radiator Unit Sub-assembly
      *13 Turbocharger Sub-assembly - -

  2. Engine Coolant


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

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

    3. Maintenance intervals are as shown in the table below:

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

      *: 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 consists of a combination of low phosphates and organic acids.)

  3. Thermostat

    Specification
    Opening Temperature 74°C to 78°C (165°F to 172°F)