Installation [06/2018 - ]: Procedure

1. Type A:
   1. Install the No. 2 exhaust manifold heat insulator to the exhaust manifold (TWC: Front Catalyst) with the 6 bolts.

      Torque: 11 N.m (112 kgf/cm, 8 ft.lbf) 

2. Type B:
   1. Install the No. 2 exhaust manifold heat insulator to the exhaust manifold with the 3 bolts.

      Torque: 11 N.m (112 kgf/cm, 8 ft.lbf) 

1. Install a new exhaust manifold to head gasket to the cylinder head sub-assembly.
2. Temporarily install the exhaust manifold (TWC: Front Catalyst), No. 1 exhaust manifold heat insulator and No. 1 upper front floor heat insulator.

   HINT: 

   At this time, do not install the parts with bolts or nuts.

3. Using a 12 mm deep socket wrench, temporarily install the exhaust manifold (TWC: Front Catalyst) to the cylinder head sub-assembly with 7 new nuts.
   Fig 1: Exhaust Manifold (TWC: Front Catalyst) Nuts With Tightening Sequence

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using the 12 mm deep socket wrench, tighten the 7 nuts in the order shown in the illustration.

   Torque: 26 N.m (265 kgf/cm, 19 ft.lbf) 

1. Temporarily install the manifold stay to the exhaust manifold (TWC: Front Catalyst) and cylinder block sub-assembly with the bolt and nut.
   Fig 2: Manifold Stay Tightening Sequence

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Tighten the bolt and nut in the order shown in the illustration.

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

1. Type A:
   1. Using a 10 mm union nut wrench, install the No. 1 exhaust manifold heat insulator to the exhaust manifold (TWC: Front Catalyst) with the 5 bolts.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	Torque Wrench Fulcrum Length

      Specified tightening torque 

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

      HINT: 

      • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

        Refer to PRECAUTION [06/2018 - ]

      • When using a 10 mm union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)): 8.8 N.m (90 kgf/cm, 78 in.lbf)
2. Type B:
   1. Install the No. 1 exhaust manifold heat insulator to the exhaust manifold with the 3 bolts.

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

1. Using a 10 mm union nut wrench, install the No. 1 upper front floor heat insulator to the vehicle body with the 2 nuts.

   Specified tightening torque 

   Torque: 4.9 N.m (50 kgf/cm, 43 in.lbf) 

   HINT: 

   • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

     Refer to PRECAUTION [06/2018 - ]

   • When using a 10 mm union nut wrench (fulcrum length of 22 mm (0.866 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)): 4.3 N.m (44 kgf/cm, 38 in.lbf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Torque Wrench Fulcrum Length

1. Install the wire harness clamp bracket with the bolt.

   Torque: 13 N.m (133 kgf/cm, 10 ft.lbf) 

Refer to INSTALLATION [06/2018 - ]

Refer to PROCEDURE - Step 15 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 15 [08/2021 - ]

Refer to INSTALLATION [06/2018 - ]

Refer to PROCEDURE - Step 5

1. Install 2 new gaskets to the front exhaust pipe assembly (TWC: Rear Catalyst).
2. Connect the front exhaust pipe assembly (TWC: Rear Catalyst) to the 2 exhaust pipe supports.
3. Install the front exhaust pipe assembly (TWC: Rear Catalyst) to the exhaust manifold (TWC: Front Catalyst) and center exhaust pipe assembly with 2 new bolts and 2 new nuts.

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

4. Engage the wire harness clamp.
5. Connect the air fuel ratio sensor (for sensor 2) connector.

See step  5

See step  6

See step  7

See step  8

See step  9

Refer to PROCEDURE - Step 42 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 43 [08/2021 - ]

Refer to PROCEDURE - Step 43 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 44 [08/2021 - ]

Refer to PROCEDURE - Step 44 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 45 [08/2021 - ]

Refer to PROCEDURE - Step 45 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 46 [08/2021 - ]