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Installation [06/2018 - ]: Procedure

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  1. INSTALL STUD BOLT 

    HINT: 

    If a stud bolt is deformed or its threads are damaged, replace it.

    1. Using an E8 "TORX" socket wrench, install the 2 stud bolts to the exhaust manifold assembly LH (TWC: Front Catalyst).
      GTY766170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 19.5 N.m (199 kgf/cm, 14 ft.lbf) 

  2. INSTALL EXHAUST MANIFOLD TO HEAD GASKET (for Bank 2) 
    1. Install a new exhaust manifold to head gasket (for Bank 2) to the cylinder head sub-assembly.
  3. INSTALL EXHAUST MANIFOLD ASSEMBLY LH (TWC: Front Catalyst) 
    1. Temporarily install the exhaust manifold assembly LH (TWC: Front Catalyst) with the 4 nuts.
    2. Temporarily install the No. 2 manifold stay to the exhaust manifold assembly LH (TWC: Front Catalyst) and cylinder block sub-assembly with the bolt and nut.
    3. Using a 12 mm deep socket wrench, tighten the 4 nuts in the order shown in the illustration.
      Fig 1: Exhaust Manifold Assembly LH (TWC: Front Catalyst) Nuts Tightening Sequence
      GTY749375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    4. Tighten the bolt and nut in the order shown in the illustration.
      Fig 2: Exhaust Manifold Brace LH Tightening Sequence
      GTY744296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Nut

      Nut 

      Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

      Bolt 

      Torque: 34 N.m (347 kgf/cm, 25 ft.lbf) 

  4. CONNECT NO. 5 WATER BY-PASS HOSE 
    1. Engage the 2 clamps to connect the No. 5 water by-pass hose and No. 6 water by-pass hose to the hose clamp.
  5. INSTALL NO. 2 EXHAUST MANIFOLD HEAT INSULATOR 
    1. Install the No. 2 exhaust manifold heat insulator to the exhaust manifold assembly LH (TWC: Front Catalyst) with the 3 bolts in the order shown in the illustration.

      Torque: 8.5 N.m (87 kgf/cm, 75 in.lbf) 

      Fig 3: No. 2 Exhaust Manifold Heat Insulator Bolts Tightening Sequence
      GTY746308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL ENGINE OIL LEVEL DIPSTICK GUIDE 

    Refer to PROCEDURE - Step 5 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 5 [08/2021 - ]

  7. INSTALL AIR FUEL RATIO SENSOR (for Bank 2) 

    Refer to PROCEDURE - Step 2

  8. INSTALL COOL AIR INTAKE DUCT SEAL 

    Refer to PROCEDURE - Step 2 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 2 [08/2021 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]

  9. INSTALL V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 47

  10. INSTALL EXHAUST MANIFOLD TO HEAD GASKET (for Bank 1) 
    1. Install a new exhaust manifold to head gasket (for Bank 1) to the cylinder head sub-assembly RH.
  11. INSTALL EXHAUST MANIFOLD ASSEMBLY RH (TWC: Front Catalyst) 
    1. Temporarily install the exhaust manifold assembly RH (TWC: Front Catalyst) with the 4 nuts.
    2. Using a 12 mm deep socket wrench, tighten the 4 nuts in the order shown in the illustration.

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

      Fig 4: Exhaust Manifold Assembly RH (TWC: Front Catalyst) Nuts Tightening Sequence
      GTY762770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSTALL NO. 1 EXHAUST MANIFOLD HEAT INSULATOR 
    1. Install the No. 1 exhaust manifold heat insulator to the exhaust manifold assembly RH (TWC: Front Catalyst) with the 3 bolts in the order shown in the illustration.

      Torque: 8.5 N.m (87 kgf/cm, 75 in.lbf) 

      Fig 5: No. 1 Exhaust Manifold Heat Insulator Bolts Tightening Sequence
      GTY764515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Temporarily Tighten
  13. INSTALL AIR FUEL RATIO SENSOR (for Bank 1) 

    Refer to PROCEDURE - Step 1

  14. INSTALL FRONT EXHAUST PIPE ASSEMBLY (TWC: Rear Catalyst) 
    1. Install 3 new gaskets to the front exhaust pipe assembly (TWC: Rear Catalyst).
    2. Connect the front exhaust pipe assembly (TWC: Rear Catalyst) to the exhaust pipe support.
    3. Install the front exhaust pipe assembly (TWC: Rear Catalyst) with 4 new bolts and 4 new nuts.

      Torque: 43 N.m (438 kgf/cm, 32 ft.lbf) 

    4. Engage the 2 wire harness clamps.
    5. Connect the 2 heated oxygen sensor connectors.
  15. INSTALL NO. 1 EXHAUST PIPE SUPPORT BRACKET (for Lower Side) 

    See step  4

  16. INSTALL BODY MOUNTING PLATE 

    See step  5

  17. INSTALL FRONT FLOOR COVER LH 

    See step  9

  18. INSTALL FRONT FLOOR COVER RH 

    See step  10

  19. INSPECT FOR EXHAUST GAS LEAK 

    See step  13

  20. INSTALL NO. 2 ENGINE UNDER COVER 

    Refer to PROCEDURE - Step 68

  21. INSTALL NO. 1 ENGINE UNDER COVER 

    Refer to PROCEDURE - Step 70

  22. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH 

    Refer to PROCEDURE - Step 71

  23. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH 

    Refer to PROCEDURE - Step 72

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