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Home >> Lexus >> 2017 >> LS 460 L, RWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - Service Information >> Coolant >> Replacement [09/2015 - ] >> Procedure

Replacement [09/2015 - ]: Procedure

  1. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 1

  2. REMOVE AIR CLEANER INLET COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 2

  3. REMOVE NO. 1 AIR CLEANER INLET 

    Refer to PROCEDURE - Step 3

  4. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH (for AWD) 

    Refer to PROCEDURE - Step 7

  5. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH (for AWD) 

    Refer to PROCEDURE - Step 8

  6. REMOVE NO. 1 ENGINE UNDER COVER 
    1. Remove the 13 screws, 7 clips and No. 1 engine under cover.
      GTY410324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for 2WD
      *B for AWD
  7. DRAIN ENGINE COOLANT 
    WARNING:

    Do not remove the radiator reservoir cap and vent plug while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

    1. Loosen the radiator drain cock plug.
      GTY674199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Radiator Drain Cock Plug *2 Radiator Reservoir Cap
      *3 Vent Plug *4 Cylinder Block Drain Cock Plug

      HINT: 

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

    2. Remove the radiator reservoir cap, and using a 6 mm hexagon wrench, remove the vent plug.
      GTY662047Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Vent Plug
    3. Drain coolant.
    4. Loosen the 2 cylinder block drain cock plugs.
  8. ADD ENGINE COOLANT 

    Standard Capacity

    Item Specified Condition
    for 2WD 11.0 liters (11.6 US qts, 9.7 Imp. qts)
    for AWD 11.1 liters (11.7 US qts, 9.8 Imp. qts)
    WARNING:

    Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized hot engine coolant and steam may be released and cause serious burns.

    HINT: 

    Before adding coolant, turn the A/C switch off.

    1. Tighten the radiator drain cock plug.
    2. Tighten the 2 cylinder block drain cock plugs.

      Torque: 13 N*m (133 kgf*cm, 10 ft.*lbf) 

    3. Add TOYOTA Super Long Life Coolant (SLLC) into the radiator reservoir.

      Capacity

      5.0 liters (5.3 US qts, 4.4 Imp. qts)

      HINT: 

      • TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to 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 consists of a combination of low phosphates and organic acids).
      • Please contact your TOYOTA dealer for further details.
    4. Further add coolant into the radiator reservoir until it reaches the FULL line.
    5. Press the No. 1 and No. 2 radiator hoses several times by hand, and then check the coolant level.

      If the coolant level is low, add coolant.

    6. Using a 6 mm hexagon wrench, install the vent plug.

      Torque: 1.5 N*m (15 kgf*cm, 13 in.*lbf) 

    7. Bleed air from the cooling system.
      NOTE:

      Before starting the engine to warm up the engine, turn the A/C switch off.

      1. While idling the engine for approximately 10 minutes, make sure the coolant remains at the FULL line by adding coolant as necessary.
      2. After idling the engine for 10 minutes, add coolant until it reaches the B line.
        GTY412796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Capacity

        2.5 to 3.5 liters (2.6 to 3.7 US qts, 2.2 to 3.1 Imp. qts)

        TEXT IN ILLUSTRATION

        B Line

        HINT: 

        The B line is the lower edge of the inner wall of the filler neck.

      3. Close the radiator reservoir cap, and run the engine at 1500 to 2000 rpm for 5 minutes.
        WARNING:
        • Wear protective gloves.
        • Be careful as the radiator hoses are hot.
        • Keep your hands away from the radiator fans.

        HINT: 

        The thermostat open timing can be confirmed by pressing the No. 1 radiator hose by hand, and checking when the SLLC starts to flow inside the hose.

    8. Stop the engine and wait until the coolant cools down to ambient temperature.
    9. Check the coolant level.

      If the coolant level is below the FULL line, add coolant until it reaches the FULL line.

  9. INSPECT FOR COOLANT LEAK 

    Refer to PROCEDURE - Step 1

  10. INSTALL NO. 1 AIR CLEANER INLET 

    Refer to PROCEDURE - Step 3

  11. INSTALL AIR CLEANER INLET COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 7

  12. INSTALL V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 8

  13. INSTALL NO. 1 ENGINE UNDER COVER 
    1. Install the No. 1 engine under cover with the 13 screws and 7 clips.
  14. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH (for AWD) 

    Refer to PROCEDURE - Step 15

  15. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH (for AWD) 

    Refer to PROCEDURE - Step 16

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