COOLING SYSTEM


  1. OUTLINE


    1. The cooling system is a pressurized, forced-circulation type.

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

    3. A downflow radiator is used.

    4. A cooling fan control system in which the cooling fan ECU optimally controls cooling fan speed is used. For details, 2AR-FSE Engine Control.

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

      A011120C01
      *A Models with EGR System *B Models without EGR System
      *1 Engine Water Pump Assembly *2 Water Inlet with Thermostat Sub-assembly
      *3 Throttle Body with Motor Assembly *4 EGR Valve Assembly
      *5 EGR Cooler Assembly *6 Water By-pass Pipe
      *a From Radiator Assembly *b To Heater Radiator Unit Sub-assembly
      *c From Heater Radiator Unit Sub-assembly *d To Radiator Assembly
      B003XML Coolant Flow - -

  2. SPECIFICATION


    1. Engine Coolant


      1. TOYOTA genuine Super Long Life Coolant (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)
        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 consists of a combination of low phosphates and organic acids.)

      2. SLLC is pre-mixed (50% coolant and 50% deionized water), and therefore does not need to be diluted.

      3. If LLC (red-colored) is mixed with SLLC (pink-colored), the interval for LLC (every 40000 km (24000 miles) or 24 months whichever comes first) should be used.

    2. Thermostat

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