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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 2.4L) >> Repair Instructions - Off Vehicle >> Exhaust Manifold Removal

Exhaust Manifold Removal

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Secondary Air Injection Check Valves, Bolts & Gaskets
    GM2723413Courtesy of GENERAL MOTORS COMPANY
  1. Remove the secondary air injection check valves (1) bolts (3), and gaskets (2).
    2. Fig 2: Oxygen Sensor
    GM2723418Courtesy of GENERAL MOTORS COMPANY
  2. Remove the oxygen sensor (1).
    3. Fig 3: Exhaust Manifold Heat Shield & Bolts
    GM2723419Courtesy of GENERAL MOTORS COMPANY
  3. Remove the exhaust manifold heat shield (1) and bolts (2).
    4. Fig 4: Exhaust Manifold & Retaining Nuts
    GM2723421Courtesy of GENERAL MOTORS COMPANY
  4. Remove and discard the exhaust manifold to cylinder head retaining nuts (1).
  5. Remove the exhaust manifold (2).
  6. Clean all of the sealing surfaces.
  7. If the exhaust manifold is being replaced, transfer the following parts:
    • The exhaust manifold heat shield
    • The oxygen sensor
    8. Fig 5: Block Heater & Bolt
    GM2723426Courtesy of GENERAL MOTORS COMPANY
  8. Remove the block heater (1), if equipped.
    9. Fig 6: Secondary Air Injection Check Valve Pipe Adapter & Mounting Components
    GM2723431Courtesy of GENERAL MOTORS COMPANY
  9. Remove the nut (1), bracket (2), bolts (4), and secondary air injection check valve pipe adapter (3).
    10. Fig 7: Secondary Air Injection Check Valve Pipe Adapter & Mounting Components
    GM2723434Courtesy of GENERAL MOTORS COMPANY
  10. Remove the stud-bolt (1), bolt (4), nut (3), and secondary air injection check valve pipe adapter (2).
    11. Fig 8: Upper Secondary Air Injection Assembly Studs, Exhaust Manifold Gasket & Studs
    GM2723437Courtesy of GENERAL MOTORS COMPANY
  11. Remove and discard the exhaust manifold studs (1).
  12. Remove and discard the upper secondary air injection assembly studs (3, 4), if necessary.
  13. Remove and discard the exhaust manifold gasket (2).
  14. Clean all of the sealing surfaces.
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