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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 413 (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 car, the 2003 Nissan Altima. 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 step  17 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.
  5. Remove the front exhaust tube.
  6. Remove the front suspension member as follows:
    Fig 1: Remove Front Suspension Member (1 Of 2)
    G02110533Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Remove Front Suspension Member (2 Of 2)
    G02110534Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Before disconnecting, support the front suspension member with a suitable power lift. Use the lift to lower the member to remove it.
    1. Disconnect the lower ball joints.

      Refer to TRANSVERSE LINK & BALL JOINT .

    2. Remove the steering gear mounting bolts.
    3. Disconnect the upper sway bar connecting rod.

      Refer to STABILIZER BAR .

    4. Disconnect the front and rear engine mounts electrical connectors, if equipped. Remove the front and rear engine mount through bolts and nuts using power tool.
      CAUTION: For vehicles equipped with an automatic transaxle, the front and rear engine mounts are electrically controlled. Disconnect the engine mount electrical connector(s) before removing the through bolt and nut.
    5. Disconnect the power steering line bracket.
    6. Remove the LH and RH drive axles.

      Refer to REMOVAL AND INSTALLATION .

    7. Remove the front suspension member mounting nuts and lower the member out of the engine compartment.
  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 3: Exhaust Manifold Loosening Sequence
    G02110535Courtesy of NISSAN MOTOR CO., U.S.A.
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