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Home >> Saturn >> 2000 >> LS2 Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 3.0L DOHC V6 >> Removal & Installation >> Exhaust Manifold >> Rear Exhaust Manifold Replacement >> Removal

Rear Exhaust Manifold Replacement: Removal

  1. Disconnect exhaust manifold heated oxygen sensor electrical connection.
  2. Remove exhaust manifold heated oxygen sensor using O2 Sensor Wrench J39194C.
    Fig 1: Disconnecting HO2S Sensor
    G01036781Courtesy of GENERAL MOTORS CORP.
  3. Remove EGR pipe.
    NOTE: Do not apply grease or silicon products to the heated oxygen sensor. Do not alter the wiring in any way. The wires carry air reference to the sensor.
  4. Disconnect rear exhaust manifold pipe heated oxygen sensor electrical connection.
  5. Remove rear exhaust manifold pipe heat shield.
    Fig 2: Removing Heat Shield
    G01036782Courtesy of GENERAL MOTORS CORP.
  6. Remove rear exhaust manifold pipe heated oxygen sensor.
    Fig 3: Removing HO2S Sensor
    G01036783Courtesy of GENERAL MOTORS CORP.
    CAUTION: MAKE SURE THAT VEHICLE IS PROPERLY SUPPORTED AND SQUARELY POSITIONED ON HOIST.
  7. Raise vehicle on hoist.
  8. Remove rear exhaust manifold pipe to front exhaust manifold pipe attachment bolts.
    Fig 4: Removing Rear Exhaust Pipe From Front Exhaust Pipe
    G01036784Courtesy of GENERAL MOTORS CORP.
  9. Remove rear exhaust manifold pipe to resonator bolts.
  10. Remove rear exhaust manifold pipe assembly from vehicle.
  11. Remove exhaust manifold nuts.
  12. Remove exhaust manifold and gasket.
    Fig 5: Unbolting Resonator From Rear Exhaust Pipe
    G01036785Courtesy of GENERAL MOTORS CORP.
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