FUEL RELIEF VALVE INSTALLATION


  1. INSTALL FUEL RELIEF VALVE ASSEMBLY


    1. A0162OW

      Install a new gasket to the fuel relief valve assembly.

    2. Using a 14 mm deep socket wrench, install the fuel relief valve assembly to the fuel delivery pipe.

      Torque:
      40 N*m  { 408 kgf*cm, 30 ft.*lbf }

      Note


      • Do not apply oil to the threads of the fuel relief valve assembly and fuel delivery pipe.

      • Do not allow foreign matter to enter the pipe during installation.

    3. A015YPAE01

      Connect the No. 3 fuel hose.

  2. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY


    1. A0160E4

      Install the No. 1 engine cover sub-assembly.

  3. INSTALL INTAKE AIR SURGE TANK ASSEMBLY


    1. Install the intake air surge tank assembly Click here.

  4. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

    Note

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

  5. ADD ENGINE COOLANT

    Note

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

    Total capacity
    11.9 liters (12.6 US qts, 10.5 Imp. qts)

    1. Tighten the radiator drain cock plug by hand.

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

      Tech Tips


      • LEXUS 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).

      • Contact any authorized LEXUS dealer or repairer or another duly qualified and equipped professional for further details.

      • Thermostat opening timing can be confirmed by squeezing the inlet radiator hose and sensing vibrations when the coolant starts to flow inside the hose.

    4. A015YN3

      Further add coolant into the reservoir until it reaches the FULL line.

    5. Squeeze the No. 1 and No. 2 radiator hoses several times, and then check the coolant level.

      If the coolant level is low, add coolant.

    6. A0161WSE01

      Using a 6 mm socket 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, turn the A/C switch off.


      1. While idling the engine for approximately 10 minutes, make sure that the coolant remains at the FULL line by adding coolant as necessary.

      2. A0160C3E01

        After idling the engine for 10 minutes, add coolant to the level shown in the illustration.

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

      3. Close the radiator reservoir cap, and run the engine at 1500 to 2000 rpm for 5 minutes.

        Tech Tips

        Thermostat opening timing can be confirmed by squeezing the No. 1 radiator hose and sensing vibrations when the SLLC starts to flow inside the hose.

        CAUTION:

        When squeezing the radiator hose:


        • Wear protective gloves.

        • Be careful as the radiator hose is hot.

        • Keep your hands away from the radiator fan.

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

      CAUTION:

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

    9. A015YN3

      Check the coolant level.

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

  6. INSPECT FOR COOLANT LEAK

    Note

    Before performing each inspection, turn the A/C switch OFF.

    CAUTION:

    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.


    1. A016221

      Fill the radiator with coolant and attach a radiator cap tester.

    2. Warm up the engine.

    3. Using the radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf/cm2, 17 psi), and check that the pressure does not drop.

      If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and head.

  7. INSPECT FOR FUEL LEAK


    1. Check fuel pump operation.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

        Note

        Do not start the engine.

      3. Turn the intelligent tester on.

      4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.

      5. Check for pressure in the fuel inlet tube from the fuel line. Check that sounds of fuel flowing in the fuel tank can be heard. If no sounds can be heard, check the instrument panel junction block, fuel pump, ECM and wiring connectors.

    2. Inspect for fuel leaks.


      1. Check that there are no fuel leaks from the fuel system after performing any maintenance. If there is a fuel leak, repair or replace parts as necessary.

    3. Turn the engine switch off.

    4. Disconnect the intelligent tester from the DLC3.