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Installation [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 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. GTY1079710Courtesy 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. GTY1078021Courtesy 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. Fig 1: EGR Cooler Assembly Bolts And Nuts Tightening Sequence
      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. GTY1078021Courtesy 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. GTY1079711Courtesy 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 [11/2021 - ]

  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 

    Refer to PROCEDURE - Step 4

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