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Installation [04/2013 - 08/2015]: Procedure

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY LH (TWC: Front Catalyst) 
    1. Set a new gasket to the cylinder head sub-assembly.
      GTY461349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
      Front

      HINT: 

      Orient the protrusion of the gasket as shown in the illustration.

    2. Temporarily install the exhaust manifold sub-assembly LH (TWC: Front Catalyst) with 6 new nuts.
      GTY468771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Nut A
      *b Nut B
      Front
    3. Using a 12 mm deep socket wrench, tighten the 6 nuts.

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

      NOTE:
      • Be sure to tighten either the nut (A) or (B) shown in the illustration first.
      • Do not damage the stud bolts when installing the exhaust manifold sub-assembly LH (TWC: Front Catalyst).
  2. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY RH (TWC: Front Catalyst) 
    1. Set a new gasket to the cylinder head sub-assembly.
      GTY458161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
      Front

      HINT: 

      Orient the protrusion of the gasket as shown in the illustration.

    2. Temporarily install the exhaust manifold sub-assembly RH (TWC: Front Catalyst) with 6 new nuts.
      GTY458573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Nut A
      *b Nut B
      Front
    3. Using a 12 mm deep socket wrench, tighten the 6 nuts.

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

      NOTE:
      • Be sure to tighten either the nut (A) or (B) shown in the illustration first.
      • Do not damage the stud bolts when installing the exhaust manifold sub-assembly RH (TWC: Front Catalyst).
  3. INSTALL NO. 2 ENGINE OIL LEVEL DIPSTICK GUIDE 
    1. Install a new O-ring to the No. 2 engine oil level dipstick guide.

      HINT: 

      Apply a light coat of engine oil to the O-ring.

    2. Install the No. 2 engine oil level dipstick guide to the cylinder block with the bolt.

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

    3. Install the engine oil level dipstick.
  4. INSTALL FRONT PROPELLER SHAFT ASSEMBLY (for AWD) 

    Refer to PROCEDURE - Step 1

  5. INSTALL NO. 1 EXHAUST PIPE SUPPORT BRACKET SUB-ASSEMBLY 
    1. Install the No. 1 exhaust pipe support bracket sub-assembly to the transmission with transfer assembly with the 2 bolts.

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

  6. INSTALL FRONT EXHAUST PIPE ASSEMBLY (TWC: Rear Catalyst) 

    See step  4

  7. CONNECT HEATED OXYGEN SENSOR 

    See step  5

  8. INSTALL FRONT CENTER FLOOR BRACE 

    See step  6

  9. INSTALL REAR NO. 2 FLOOR BOARD SUB-ASSEMBLY (for Full Cover Type) 

    Refer to PROCEDURE - Step 77

  10. INSTALL REAR NO. 1 FLOOR BOARD SUB-ASSEMBLY (for Full Cover Type) 

    Refer to PROCEDURE - Step 78

  11. INSTALL NO. 2 ENGINE UNDER COVER (w/ No. 2 Engine Under Cover) 

    Refer to PROCEDURE - Step 99

  12. INSTALL FRONT SUSPENSION MEMBER BRACE (for 2WD) 

    Refer to PROCEDURE - Step 100

  13. INSTALL AIR FUEL RATIO SENSOR 

    Refer to INSTALLATION [04/2013 - 08/2015]

  14. INSPECT FOR EXHAUST GAS LEAK 

    See step  9

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