Replacement [10/2019 - 07/2022]: Procedure

1. Remove the 2 screws, 6 clips and rear engine under cover LH from the vehicle.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect a hose with an inside diameter of 9 mm (0.354 in.) to the radiator drain cock as shown in the illustration.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Hose

2. Loosen the radiator drain cock plug.
3. Remove the radiator cap sub-assembly. Then drain the engine coolant.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1

   Radiator Cap Sub-assembly

   *2

   Radiator Drain Cock Plug

   HINT: 

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

4. Tighten the radiator drain cock plug by hand.
5. Disconnect the hose from the radiator drain cock.

1. Add engine coolant.

   Standard Capacity

   6.6 liters (7.0 US qts, 5.8 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 MAX line. [*2]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	MAX Line
   *b	MIN Line

   NOTE:

   Do not substitute plain water for engine coolant.

4. Install the reserve tank cap. [*3]
5. Install the radiator cap sub-assembly.
   NOTE:

   Securely tighten the radiator cap sub-assembly as much as possible.

6. Bleed air from the cooling system. [*4]
   NOTE:

   • Before starting the engine, turn the A/C switch off.
   • Adjust the heater control to the maximum hot setting.
   • Adjust the blower speed to the low setting.
   1. Warm up the engine until the thermostat opens. While the thermostat is open, circulate the engine coolant for several minutes.

      HINT: 

      The thermostat 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.

   2. After the engine has warmed up, run the engine using the following cycle for at least 7 minutes: at 3000 rpm for 5 seconds, at idle speed for 45 seconds. (Repeat this cycle at least 8 times.)
   3. Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand to bleed air from the system.
      WARNING:

      When squeezing the No. 1 radiator hose and No. 2 radiator hose:

      • Wear protective gloves.
      • Be careful as the No. 1 radiator hose and No. 2 radiator hose are 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 reserve tank assembly still has some engine coolant in it.
      • If the reserve tank assembly does not have enough engine coolant, the engine may overheat or be seriously damaged.
      • If the 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 reserve tank assembly is filled to the full line.
7. Wait until the engine coolant cools down. [*5]
8. Check that the engine coolant level is between the MAX line and MIN line. [*6]

   HINT: 

   • If the engine coolant level is below the MIN line, repeat steps from [*1] to [*6].
   • If the engine coolant level is above the MAX line, drain the engine coolant until the engine coolant level is between the MAX line and MIN line.

   If the flowing sound of engine coolant can still be heard after bleeding air, perform the following procedure to bleed air again.

   1. Warm up the engine.
   2. Run the engine at 2000 rpm for 2 minutes or more. (A)
   3. Leave the engine idling for 2 minutes or more. (B)
   4. Repeat steps (A) and (B) 4 times or more.

Refer to PROCEDURE - Step 1

1. Install the rear engine under cover LH to the vehicle with the 2 screws and 6 clips.