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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (5.6L) (Except Hybrid) >> Unit Disassembly And Assembly >> Exhaust Manifold And Three Way Catalyst >> Disassembly and Assembly >> Disassembly

Disassembly and Assembly: Disassembly

NOTE: For 2WD models, the exhaust manifold on the bank 2 side can be removed without removing the engine.
  1. Remove heated oxygen sensor 2.
    CAUTION: Heated oxygen sensor 2 is not reusable. Never remove heated oxygen sensor 2 unless this is required.
    • Using the heated oxygen sensor wrench [SST: KV10114400 (J-38365)] (A), remove heated oxygen sensor 2 (1).
      GNSJPBIA2329Z-329Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE:
      • The heated oxygen sensor 2 is removable under vehicle-mounted condition.
      • The figure shows an example of bank 1.
  2. Remove three way catalyst (bank 1 and bank 2).
  3. Remove air fuel ratio sensor 1 as per the following:
    CAUTION: Air fuel ratio sensor 1 is not reusable. Never remove air fuel ratio sensor 1 unless this is required.
    • Using the heated oxygen sensor wrench [SST: KV10114400 (J-38365)], remove air fuel ratio sensor 1.
      NOTE: The air fuel ration sensor 1 is removable under vehicle-mounted condition.
  4. Remove exhaust manifold cover.
  5. Remove exhaust manifold.
    • Loosen nuts in the reverse order of figure to remove exhaust manifold with power tool.
      GNSJPBIA2080Z-080Courtesy of NISSAN NORTH AMERICA, INC.

      A

      : Bank 1

      B

      : Bank 2

      SYMBOL

      : Engine front
      NOTE: Disregard No. 9 to No. 12 when loosening.
  6. Remove exhaust manifold gaskets.
    CAUTION: Cover engine openings to avoid entry of foreign materials.
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