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Installation [10/2022 - 08/2023]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
  1. LOOSEN NO. 1 EGR PIPE SUB-ASSEMBLY 
    1. GTY1206159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, loosen the 4 bolts of the No. 1 EGR pipe sub-assembly.

        HINT: 

        • As the bolts of the No. 1 EGR pipe sub-assembly are only to be loosened, it is not necessary to replace the EGR inlet gasket and EGR valve adapter gasket.
        • If the No. 1 EGR pipe sub-assembly is removed, it is necessary to replace the EGR inlet gasket and EGR valve adapter gasket with new ones.
  2. LOOSEN EGR VALVE ASSEMBLY 
    1. GTY1131605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, loosen the 2 bolts of the EGR valve assembly.
  3. INSTALL NO. 1 EGR COOLER GASKET 
    1. GTY1077789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Claw - -
      1. Install a new No. 1 EGR cooler gasket to the EGR cooler assembly.
        NOTE:

        Make sure that the claws of the EGR cooler gasket are toward the EGR cooler assembly side.

  4. INSTALL EGR VALVE GASKET 
    1. GTY1077820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Claw - -
      1. Install a new EGR valve gasket to the EGR cooler assembly.
        NOTE:

        Make sure that the claws of the EGR valve gasket are toward the EGR cooler assembly side.

  5. INSTALL EGR COOLER ASSEMBLY 
    1. GTY1078356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bolt or Nut - -
      1. for Type A:

        Temporarily install the EGR cooler assembly to the cylinder head sub-assembly and EGR valve assembly with the 3 bolts and 2 nuts.

      2. for Type A:

        Tighten the 3 bolts and 2 nuts in the order shown in the illustration.

        Torque: 24 N.m (245 kgf/cm, 18 ft.lbf) 

      3. for Type B:

        Temporarily install the EGR cooler assembly to the cylinder head sub-assembly and EGR valve assembly with the 2 bolts and 3 nuts.

      4. for Type B:

        Tighten the 2 bolts and 3 nuts in the order shown in the illustration.

        Torque: 24 N.m (245 kgf/cm, 18 ft.lbf) 

  6. CONNECT NO. 4 WATER BY-PASS HOSE 
  7. CONNECT NO. 3 WATER BY-PASS HOSE 
  8. TIGHTEN EGR VALVE ASSEMBLY 
    1. GTY1131604Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, tighten the 2 bolts of the EGR valve assembly.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  9. TIGHTEN NO. 1 EGR PIPE SUB-ASSEMBLY 
    1. GTY1206159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, tighten the 4 bolts of the No. 1 EGR pipe sub-assembly.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  10. INSTALL INVERTER WITH CONVERTER ASSEMBLY 

    Refer to INSTALLATION [10/2022 - ]

  11. ADD ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 5

  12. INSPECT FOR COOLANT LEAK (for Engine) 
    Refer to PROCEDURE - Step 1
  13. INSPECT FOR EXHAUST GAS LEAK 

    If gas is leaking, tighten the areas necessary to stop the leak. Replace damaged parts as necessary.

    HINT: 

    Perform "Inspection After Repairs" after repairing or replacing the exhaust system.

    Refer to PROCEDURE - Step 6

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