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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. INSTALL VACUUM HOSE 
  2. INSTALL NO. 1 ENGINE COVER 
  3. INSTALL NO. 1 INTAKE MANIFOLD TO HEAD GASKET 
  4. INSTALL INTAKE MANIFOLD 
    1. w/ Stud Bolt:
      Fig 1: Intake Manifold (W/ Stud Bolt) Bolts And Nuts Tightening Sequence
      GTY1133786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Temporarily install the intake manifold to the cylinder head sub-assembly.
      2. Using an E8 "TORX" socket wrench, install the 2 stud bolts.

        Torque: 6.5 N.m (66 kgf/cm, 58 in.lbf) 

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

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

    2. w/o Stud Bolt:
      Fig 2: Intake Manifold (W/O Stud Bolt) Bolts And Nuts Tightening Sequence
      GTY1133053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Temporarily install the intake manifold to the cylinder head sub-assembly with the 5 bolts.
      2. Tighten the 5 bolts in the order shown in the illustration.

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

  5. INSTALL NO. 2 FUEL VAPOR FEED HOSE 
  6. INSTALL NO. 2 WATER BY-PASS PIPE 
    1. GTY1130837Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Temporarily install the No. 2 water by-pass pipe to the cylinder block sub-assembly with the bolt (B).
      2. Using an 8 mm socket wrench, temporarily install the No. 2 water by-pass pipe to the intake manifold with the 2 bolts (A).
      3. Tighten the bolt (B).

        Torque: 21 N.m (214 kgf/cm, 15 ft.lbf) 

      4. Using an 8 mm socket wrench, tighten the 2 bolts (A).

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

      5. Engage the wire harness clamp.
  7. CONNECT NO. 3 WATER BY-PASS PIPE 
    1. GTY1129772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, connect the No. 3 water by-pass pipe to the intake manifold with the bolt.

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

  8. CONNECT NO. 5 WATER BY-PASS HOSE 
  9. INSTALL EGR INLET GASKET 
  10. INSTALL EGR VALVE ADAPTER GASKET 
  11. INSTALL NO. 1 EGR PIPE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 12

  12. CONNECT ENGINE WIRE 

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

  13. CONNECT NO. 2 FUEL VAPOR FEED HOSE 
  14. CONNECT NO. 1 FUEL VAPOR FEED HOSE 
  15. INSTALL PURGE VALVE (PURGE VSV) 

    Refer to INSTALLATION [10/2022 - ]

  16. INSTALL E.F.I. VACUUM SENSOR ASSEMBLY (MANIFOLD ABSOLUTE PRESSURE SENSOR) 

    Refer to INSTALLATION [10/2022 - ]

  17. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY 

    Refer to INSTALLATION [10/2022 - 08/2023]

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