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Home >> Nissan-Datsun >> 2008 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical (Qr25DE)) >> Exhaust Manifold And Three Way Catalyst >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Remove the engine undercover and engine side covers.
  2. Remove generator and generator bracket. Refer to "REMOVAL ".
  3. Remove the exhaust front tube. Refer to "REMOVAL ".
  4. Remove oil level indicator tube.
  5. Disconnect the electrical connector of heated oxygen sensor 1 or air fuel ratio (A/F) sensor 1, and unhook the harness from the bracket and middle clamp on the cover.
  6. Remove the heated oxygen sensor 1 or air fuel ratio (A/F) sensor 1 using Tool.

    Tool numbers : - (J-44626) 

    : KV10117100 (J-36471-A) 

    Fig 1: Identifying Heated Oxygen Sensor 1
    G04924760Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • Be careful not to damage heated oxygen sensor or air fuel ratio (A/F) sensor.
    • Discard any heated oxygen sensor or air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
  7. Remove the lower exhaust manifold covers.
  8. Remove the upper exhaust manifold cover.
  9. Loosen the nuts in the sequence as shown, on the exhaust manifold and three way catalyst.
  10. Remove the exhaust manifold and three way catalyst assembly and gasket. Discard the gasket.
    Fig 2: Exhaust Manifold Nut With Loosening Sequence
    G04924761Courtesy of NISSAN MOTOR CO., U.S.A.
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