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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> Engine Exhaust Assembly (4GR-FSE) >> Exhaust Pipe >> Installation

Exhaust Pipe: Installation

  1. INSTALL TAIL EXHAUST PIPE BAFFLE SUB-ASSEMBLY 
    1. Align the baffle with the protruding part of the tail exhaust pipe assembly as shown in the illustration.
    2. Using a plastic hammer, uniformly tap the baffle sub-assemblies onto the tail exhaust pipe assembly.
    Fig 1: Tapping Baffle Sub-Assemblies Onto Tail Exhaust Pipe Assembly
    G05823897Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL EXHAUST PIPE DAMPER 
    1. Install the exhaust pipe damper with the 2 bolts.

      Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

      Fig 2: Locating Exhaust Pipe Damper Bolts
      G05828732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL TAIL EXHAUST PIPE ASSEMBLY 
    1. Install the tail exhaust pipe assembly with the 6 exhaust pipe supports.
    Fig 3: Locating Exhaust Pipe Supports
    G05828731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL FRONT EXHAUST PIPE ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the compression springs.

      Minimum length: 

      38.5 mm (1.516 in.) 

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

      Fig 4: Measuring Free Length Of Compression Springs
      G05239315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install a new gasket to the rear end of the front exhaust pipe.
      NOTE:
      • Be careful with the installation direction of the gasket.
      • Do not reuse the gasket.
      • To ensure a proper seal, do not use the tail exhaust pipe to force the gasket onto the front exhaust pipe.

      HINT: 

      Using a plastic hammer, uniformly strike the gasket so that the gasket and front exhaust pipe are properly fit. 

    3. Install 3 new gaskets and front exhaust pipe assembly.
      CAUTION: Do not reuse the gaskets.
      Fig 5: Identifying Gasket On Rear End Of Front Exhaust Pipe
      G05828738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the 2 bolts and 2 compression springs.

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

      Fig 6: Locating Bolts And Compression Springs
      G05828730Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Install 4 new nuts and 4 bolts.

      Torque: 39 N*m (398 kgf*cm, 29 ft.*lbf) 

      NOTE: Do not reuse the nuts.
      Fig 7: Locating Nuts And Bolts
      G05823892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL HEATED OXYGEN SENSOR (for 2WD) 
    1. Before installing the heated oxygen sensors, twist the sensor wires counterclockwise 4 turns.
      Fig 8: Twisting Sensor Wires Counterclockwise
      G04943779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using the SST, install the heated oxygen sensors to the front exhaust pipe.

      SST 09224-00010 

      Torque: 44 N*m (449 kgf*cm, 33 ft.*lbf) 

    3. After installing the sensors, check that the sensor wires are not twisted.

      If the sensor wires are twisted, reinstall them.

      Fig 9: Installing Heated Oxygen Sensors To Front Exhaust Pipe
      G05823905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the grommets of the heated oxygen sensors.
    Fig 10: Identifying Grommets Of Heated Oxygen Sensors
    G05828727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL HEATED OXYGEN SENSOR (for 4WD) 
    1. Before installing the sensors, twist the sensor wires counterclockwise 4 turns.
      Fig 11: Twisting Sensor Wires Counterclockwise
      G04943779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using the SST, install the heated oxygen sensors to the front exhaust pipe.

      SST 09224-00010 

      Torque: 44 N*m (449 kgf*cm, 33 ft.*lbf) 

    3. After installing the sensors, check that sensor wires are not twisted.

      If the sensor wires are twisted, reinstall them.

      Fig 12: Installing Heated Oxygen Sensors To Front Exhaust Pipe
      G05823908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the grommets of heated oxygen sensors.
    Fig 13: Identifying Grommets Of Heated Oxygen Sensors
    G05823890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSTALL FRONT CENTER FLOOR BRACE 
    1. Install the front center floor brace with the 4 bolts.

      Torque: 7.4 N*m (75 kgf*cm, 65 in.*lbf) 

      Fig 14: Locating Front Center Floor Brace Bolts
      G05828726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSTALL REAR NO. 1 FLOOR PANEL BRACE 
    1. Install the rear No. 1 floor panel brace with the 4 bolts.

      Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

  9. CHECK FOR EXHAUST GAS LEAKS 

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

    Fig 15: Locating Rear No. 1 Floor Panel Brace Bolts
    G05823911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002