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Home >> Lexus >> 2019 >> GS F >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Intake System / Exhaust System - Service Information >> Exhaust Manifold >> Removal [10/2015 - 09/2017] >> Procedure

Removal [10/2015 - 09/2017]: Procedure

  1. REMOVE AIR FUEL RATIO SENSOR 

    Refer to REMOVAL [10/2015 - 09/2017]

  2. REMOVE ENGINE MOUNTING DAMPER 
    1. Remove the bolt and engine mounting damper from the front No. 1 engine mount bracket.
      GTY500878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE NO. 2 EXHAUST MANIFOLD HEAT INSULATOR 
    1. Remove the 3 bolts and No. 2 exhaust manifold heat insulator from the exhaust manifold sub-assembly LH (TWC: Front Catalyst).
      GTY500877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY LH (TWC: Front Catalyst) 
    1. GTY500874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 8 nuts and exhaust manifold sub-assembly LH (TWC: Front Catalyst) from the cylinder head sub-assembly.

  5. REMOVE EXHAUST MANIFOLD TO HEAD GASKET (for Bank 1) 
    1. Remove the exhaust manifold to head gasket from the cylinder head sub-assembly.
      GTY521742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE ENGINE UNDER COVER SUB-ASSEMBLY RH 

    Refer to PROCEDURE - Step 63

  7. REMOVE ENGINE OIL LEVEL DIPSTICK 
    1. Remove the engine oil level dipstick from the engine oil level dipstick guide.
  8. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE 
    1. Remove the bolt and engine oil level dipstick guide.
      GTY500869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the O-ring from the engine oil level dipstick guide.
  9. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR 
    1. Remove the 3 bolts and No. 1 exhaust manifold heat insulator from the exhaust manifold sub-assembly RH (TWC: Front Catalyst).
      GTY518240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY RH (TWC: Front Catalyst) 
    1. GTY500880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 8 nuts and exhaust manifold sub-assembly RH (TWC: Front Catalyst) from the cylinder head sub-assembly.

  11. REMOVE EXHAUST MANIFOLD TO HEAD GASKET (for Bank 2) 
    1. Remove the exhaust manifold to head gasket from the cylinder head sub-assembly.
      GTY516799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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