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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 3.5L) >> 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.
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 step  18 in REMOVAL.
  1. Remove the front wheel and tires with power tool.
  2. Remove the engine undercovers with power tool.
  3. Remove the inner wheel well splash shields with power tool.
  4. Remove the radiator and cooling fan assembly.

    Refer to REMOVAL AND INSTALLATION .

  5. Remove the front exhaust tube.

    Refer to REMOVAL AND INSTALLATION .

  6. Remove the front suspension member. Refer to FRONT SUSPENSION MEMBER .
  7. Remove heated oxygen sensor 1 (front) (bank 1) and heated oxygen sensor 2 (front) (bank 2).
    1. Remove harness connector of each heated oxygen sensor, and disconnect the harness from the bracket and middle clamp.
    2. Remove both heated oxygen sensors with the Tool.
      CAUTION:
      • Be careful not to damage heated oxygen sensor.
      • 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.
  8. Remove exhaust manifolds and the three way catalyst heat shields with power tool.
  9. 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.
  10. Remove the exhaust manifolds. Loosen the nuts in the numerical order as shown.
Fig 1: Exhaust Manifold Loosening Sequence
G02110535Courtesy of NISSAN MOTOR CO., U.S.A.