Installation [12/2017 - ]: Procedure

Refer to PROCEDURE - Step 1

1. Install a new exhaust pipe gasket to the front exhaust pipe assembly.
2. Install the front exhaust pipe assembly to the exhaust manifold assembly LH (TWC: Front Catalyst) with the 2 nuts.

   Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

3. Connect the heated oxygen sensor (for Bank 2) connector.
4. Engage the 2 wire harnesses clamps.

1. Install the No. 1 exhaust pipe support bracket with the 2 bolts.

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

Refer to PROCEDURE - Step 4

1. Install 2 new exhaust pipe gaskets to the front No. 3 exhaust pipe sub-assembly.
2. Install the front No. 3 exhaust pipe sub-assembly to the front exhaust pipe assembly and exhaust manifold (TWC: Front Catalyst) with the 2 bolts and 2 nuts.

   Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

3. Connect the heated oxygen sensor (for Bank 1) connector.
4. Engage the 4 wire harness clamps.

1. Using a vernier caliper, measure the free length of the 2 compression springs.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Length	43.0 mm (1.69 in.)
   Minimum Free Length	41.5 mm (1.63 in.)

   If the free length is less than minimum, replace the compression spring.

2. Temporarily install a new exhaust pipe gasket to the front No. 3 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 No. 3 exhaust pipe sub-assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front No. 3 Exhaust Pipe Sub-assembly
   *2	Exhaust Pipe Gasket
   *a	Wooden Block

   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.
4. Connect the center exhaust pipe assembly (TWC: Rear Catalyst) to the 2 exhaust pipe supports.
5. Install the center exhaust pipe assembly (TWC: Rear Catalyst) to the front No. 3 exhaust pipe sub-assembly with the 2 bolts and 2 compression springs.

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

   HINT: 

   After installation, check that the space between the flanges of the center exhaust pipe assembly (TWC: Rear Catalyst) and front No. 3 exhaust pipe sub-assembly is consistent front-to-rear and left-to-right.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Center Exhaust Pipe Assembly (TWC: Rear Catalyst)
   *2	Front No. 3 Exhaust Pipe Sub-assembly
   *3	Exhaust Pipe Gasket
   *a	Space between Flanges: 8.5 mm (0.335 in.)

1. Install a new exhaust pipe gasket to the center exhaust pipe assembly (TWC: Rear Catalyst).
2. Connect the tail exhaust pipe assembly to the 2 exhaust pipe supports.
3. Install the tail exhaust pipe assembly to the center exhaust pipe assembly (TWC: Rear Catalyst) with the 2 bolts.

   Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

1. Install a new exhaust pipe gasket to the center exhaust pipe assembly (TWC: Rear Catalyst).
2. Connect the tail exhaust pipe assembly to the 4 exhaust pipe supports.
3. Install the tail exhaust pipe assembly to the center exhaust pipe assembly (TWC: Rear Catalyst) with the 2 bolts.

   Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

1. Install a new exhaust pipe gasket to the tail exhaust pipe assembly.
2. Connect the No. 2 tail exhaust pipe assembly to the 2 exhaust pipe supports.
3. Install the No. 2 tail exhaust pipe assembly to the tail exhaust pipe assembly with the 2 bolts.

   Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

If gas is leaking, tighten the areas necessary to stop the leak. Replace damaged parts as necessary.

1. Perform Inspection After Repair after repairing an exhaust gas leak.

   Refer to INITIALIZATION [09/2015 - 08/2019] , or refer to INITIALIZATION [08/2019 - ]

See step  13