LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 930 (Engine Mechanical) >> Intake Manifold >> Exhaust Manifold And Three Way Catalyst >> Removal

Exhaust Manifold And Three Way Catalyst: Removal

WARNING: This page is about a different car, the 2008 Nissan Maxima. 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. Remove the radiator and cooling fan assembly. Refer to "RADIATOR ".
  5. Remove the front exhaust tube. Refer to "EXHAUST SYSTEM "
  6. Remove the front suspension member. Refer to "FRONT SUSPENSION MEMBER ".
  7. Remove the RH and LH three way catalyst support bolts in the order as shown.
    Fig 1: Identifying Catalyst Support Bolts (RH And LH) With Loosening Sequence
    G04914689Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove heated oxygen sensor 2 (bank 1), heated oxygen sensor 2 (bank 2), 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.

      Tool numbers 

      : KV10114400 (J-38365) 

      : KV991J0050 (J-44626) 

      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.
  11. Remove the exhaust manifolds. Loosen the exhaust manifold nuts in the order as shown.
    Fig 2: Identifying Exhaust Manifold Nuts (RH Bank) With Loosening Sequence
    G04914690Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Identifying Exhaust Manifold Nuts (LH Bank) With Loosening Sequence
    G04904800Courtesy of NISSAN MOTOR CO., U.S.A.
scientia non olet · About LEMON Manuals