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Replacement [12/2019 - 10/2022]: Procedure

  1. DRAIN ENGINE COOLANT 
    WARNING:

    Do not remove the radiator cap sub-assembly, cylinder block drain cock plug or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

    1. Remove the bolt and clip.
      GTY880474Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Pull down the No. 1 engine under cover.
      NOTE:

      Do not damage the No. 1 engine under cover.

    3. Connect a hose with an inside diameter of 8.3 mm (0.327 in.) to the radiator drain cock as shown in the illustration.
      GTY864052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hose
    4. Loosen the radiator drain cock plug.
      GTY900308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Radiator Cap Sub-assembly *2 Radiator Drain Cock Plug
      *3 Cylinder Block Drain Cock Plug - -
    5. Loosen the cylinder block drain cock plug.
    6. Remove the radiator cap sub-assembly. Then drain the engine coolant.

      HINT: 

      Collect the engine coolant in a container and dispose of it according to the regulations in your area.

    7. Tighten the radiator drain cock plug by hand.
    8. Tighten the cylinder block drain cock plug.

      Torque: 12.7 N.m (130 kgf/cm, 9 ft.lbf) 

    9. Disconnect the hose from the radiator drain cock.
    10. Install the bolt and clip.

      Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf) 

  2. ADD ENGINE COOLANT 
    1. Add engine coolant to the water filler hole.

      Specified Capacity

      w/ Heater Water Pump 12.2 liters (12.9 US qts, 10.7 Imp. qts)
      w/o Heater Water Pump 11.8 liters (12.5 US qts, 10.4 Imp. qts)
      NOTE:

      Do not substitute plain water for engine coolant.

      HINT: 

      TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damaging the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, 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. Remove the reserve tank cap. [*1]
    3. Slowly pour engine coolant into the radiator reserve tank assembly until it reaches the FULL line. [*2]
      GTY921277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a FULL Line
      *b LOW Line
      NOTE:

      Do not substitute plain water for engine coolant.

    4. Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand, and then check the level of the engine coolant.

      If the engine coolant level is below the FULL line, add engine coolant.

    5. Install the radiator cap sub-assembly.
    6. Install the reserve tank cap. [*3]
    7. Run the engine at 3000 rpm for 10 seconds and then idle the engine for 10 seconds. (Repeat this step at least 3 times.) [*4]
    8. Warm up the engine until the water inlet with thermostat sub-assembly opens. While the water inlet with thermostat sub-assembly is open, circulate the engine coolant for several minutes. [*5]
      WARNING:
      • Wear protective gloves.
      • Be careful as the No. 2 radiator hose is hot.
      • Keep your hands away from the fan.
      NOTE:
      • If the coolant temperature gauge indicates an excessive temperature, turn off the engine and let it cool.
      • Make sure that the radiator reserve tank assembly still has some engine coolant in it.
      • If the radiator reserve tank assembly does not have enough engine coolant, the engine may overheat or be seriously damaged.
      • If the radiator reserve tank assembly does not have enough engine coolant, perform the following: 1) stop the engine, 2) wait until the engine coolant has cooled down, and 3) add engine coolant until the radiator reserve tank assembly is filled to the FULL line.

      HINT: 

      The water inlet with thermostat sub-assembly open timing can be confirmed by squeezing the No. 2 radiator hose by hand, and sensing vibrations when the engine coolant starts to flow inside the No. 2 radiator hose.

    9. Wait until the engine coolant cools down. [*6]
    10. Check that the engine coolant level is between the FULL line and LOW line. [*7]

      HINT: 

      • If the engine coolant level is below the LOW line, repeat steps from [*1] to [*7].
      • If the engine coolant level is above the FULL line, drain the engine coolant until the engine coolant level is between the FULL line and LOW line.
  3. INSPECT FOR COOLANT LEAK 

    Refer to PROCEDURE - Step 1

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