Installation [12/2023 - ]: Procedure

HINT:  If a stud bolt is deformed or the threads are damaged, replace it.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using an E8 "TORX" socket wrench, install the 2 stud bolts to the exhaust manifold assembly LH.

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

1. Fig 1: Exhaust Manifold Assembly LH Tightening Sequence

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Bolt

   Nut

   1. Temporarily install the exhaust manifold assembly LH to the cylinder head sub-assembly LH with the 4 nuts.
   2. Temporarily install the No. 2 manifold stay to the exhaust manifold assembly LH and cylinder block sub-assembly with the bolt and nut.
   3. Tighten the 4 nuts in the order shown in the illustration.

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

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Bolt

   Nut

   1. Tighten the bolt and nut in the order shown in the illustration.

      For Nut 

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

      For Bolt 

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

1. Fig 2: No. 2 Exhaust Manifold Heat Insulator Tightening Sequence

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Temporarily install the No. 2 exhaust manifold heat insulator to the exhaust manifold assembly LH with the 3 bolts.
   2. Tighten the 3 bolts in the order shown in the illustration.

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

   3. Connect the air fuel ratio sensor (for bank 2 sensor 1) connector.
   4. Engage the wire harness clamp.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Install a new exhaust pipe gasket to the front No. 2 exhaust pipe sub-assembly.
   2. Install a new exhaust pipe gasket to the front exhaust pipe sub-assembly.
   3. Using a plastic hammer and wooden block, tap in the exhaust pipe gasket until its surface is flush with the front exhaust pipe sub-assembly.
      NOTE:

      • Be careful with the installation direction of the exhaust pipe gasket.
      • Do not reuse the exhaust pipe gasket.
      • Do not damage the exhaust pipe gasket.
      • Do not push in the exhaust pipe gasket by using the exhaust pipes when connecting them.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *1	Front Exhaust Pipe Sub-assembly
      *2	Exhaust Pipe Gasket
      *a	Wooden Block

   4. Connect the front exhaust pipe assembly to the 2 No. 4 exhaust pipe supports.
   5. Install a new exhaust pipe gasket to the front exhaust pipe assembly.
   6. Install the front exhaust pipe assembly to the tail exhaust pipe assembly with 2 new bolts.

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

   7. Install the front exhaust pipe assembly to the front No. 2 exhaust pipe sub-assembly with 2 new bolts.

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

   8. Install the front exhaust pipe assembly to the front exhaust pipe sub-assembly with 2 new bolts and 2 new compression springs.

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

      HINT: 

      After installation, check that the space between the flanges of the front exhaust pipe assembly and front exhaust pipe sub-assembly is consistent front-to-rear and left-to-right.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *1	Front Exhaust Pipe Sub-assembly
      *2	Front Exhaust Pipe Assembly
      *3	Exhaust Pipe Gasket
      *a	Space between Flanges: 8.5 mm (0.335 in.)

See step  7

Refer to PROCEDURE - Step 81