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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 150 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L26) or Fuel Injector Sight Shield Replacement (L32) in Engine Mechanical - 3.8L.
  3. Remove the engine mount struts. Refer to Engine Mount Strut Replacement - Right and Engine Mount Strut Replacement - Left in Engine Mechanical - 3.8L.
  4. Remove the lower right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Lower in Engine Mechanical - 3.8L.
  5. Remove the exhaust crossover pipe bolts from the left exhaust manifold.
    6. Fig 1: Left Exhaust Crossover Pipe
    GM153576Courtesy of GENERAL MOTORS CORP.
  6. Remove the left spark plugs from cylinders 1,3 and 5. Refer to Spark Plug Replacement in Engine Controls - 3.8L.
  7. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement in Engine Mechanical - 3.8L.
  8. Remove the left engine lift bracket bolt and the nut.
    9. Fig 2: Left Engine Lift Bracket (3.8L)
    GM153577Courtesy of GENERAL MOTORS CORP.
  9. Remove the left engine lift bracket
    10. Fig 3: Left Exhaust Manifold Heat Shield
    GM153578Courtesy of GENERAL MOTORS CORP.
  10. Remove the exhaust manifold heat shield nuts.
  11. Remove the exhaust manifold heat shield.
    12. Fig 4: View Of Left Exhaust Manifold
    GM97756Courtesy of GENERAL MOTORS CORP.
  12. Remove the exhaust manifold bolts and the nuts.
  13. Remove the exhaust manifold.
  14. Remove the exhaust manifold gasket.
  15. Clean and inspect the left exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection in Engine Mechanical - 3.8L.
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