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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1049 (Engine Mechanical) >> Exhaust Manifold And Three Way Catalyst >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • Perform the work when the exhaust and cooling system have completely cooled down.
  • When removing the front and rear engine mounting through bolts and nuts, lift the engine up slightly for safety. For engine slingers, refer to REMOVAL .
  1. Remove the front wheel and tires using power tool.
  2. Remove the engine undercover.
  3. Remove the inner wheel well splash shields.
  4. If removing the LH exhaust manifold, remove the radiator and cooling fan assembly. Refer to RADIATOR .
  5. Remove the front exhaust tube. Refer to EXHAUST SYSTEM .
  6. If removing the RH exhaust manifold, remove the front suspension member. Refer to FRONT SUSPENSION MEMBER .
  7. Remove the RH and LH three way catalyst support bolts in the order shown.
    Fig 1: Removing RH And LH Three Way Catalyst Support Bolts
    G00776189Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove heated oxygen sensor 2 (bank 1), heated oxygen sensor 2 (bank 2) (4 A/T only), air fuel ratio (A/F) sensor 1 (bank 1) and air fuel ratio (A/F) sensor 1 (bank 2).
    1. Remove harness connector of each sensor, and disconnect the harness from the bracket and middle clamp.
    2. Remove both heated oxygen sensors and air fuel ratio (A/F) sensors using Tool.
      1. Tool numbers: KV10114400 (J-38365) 
      2. KV10117100 (J-3647-A) 
      CAUTION:
      • Be careful not to damage heated oxygen sensors or air fuel ratio (A/F) sensors.
      • Discard any heated oxygen 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; replace with a new sensor.
  9. Remove exhaust manifold and three way catalyst heat shields using power tool.
  10. Remove the three way catalyst (manifold) (bank 1) and three way catalyst (manifold) (bank 2) by loosening the bolts first and then removing the nuts and through bolts using power tool.
  11. Remove the exhaust manifolds. Loosen the exhaust manifold nuts in the order shown using power tool.
    Fig 2: Loosening Exhaust Manifold Nuts (1 Of 2)
    G00776190Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Loosening Exhaust Manifold Nuts (2 Of 2)
    G00776191Courtesy of NISSAN MOTOR CO., U.S.A.
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