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Home >> Buick >> 2015 >> Verano Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 2.4L (Lea)) >> Repair Instructions - Off Vehicle >> Exhaust Manifold Removal (LAF, LEA, or LUK)

Exhaust Manifold Removal (LAF, LEA, or LUK)

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Secondary Air Injection Bolts And Nuts
    GM2512844Courtesy of GENERAL MOTORS COMPANY
  1. Remove the secondary air injection bolts (2) and nuts (1).
    2. Fig 2: Secondary Air Injection Studs
    GM2512851Courtesy of GENERAL MOTORS COMPANY
  2. Remove the secondary air injection studs (3 and 4).
  3. Remove the secondary air injection valve assembly (1).
  4. Remove the secondary air injection gasket (2) and discard.
    5. Fig 3: Oxygen Sensor
    GM2206980Courtesy of GENERAL MOTORS COMPANY
  5. Remove the oxygen sensor (1).
    6. Fig 4: Exhaust Manifold Heat Shield
    GM2206981Courtesy of GENERAL MOTORS COMPANY
  6. Remove the exhaust manifold heat shield bolts.
  7. Remove the exhaust manifold heat shield (1).
    8. Fig 5: Block Heater
    GM2206982Courtesy of GENERAL MOTORS COMPANY
  8. Remove the block heater (1), if equipped.
    9. Fig 6: Exhaust Manifold Components
    GM2206983Courtesy of GENERAL MOTORS COMPANY
  9. Remove and discard the exhaust manifold to cylinder head retaining nuts (1).
  10. Remove the exhaust manifold (2).
  11. Remove the exhaust manifold gasket (3).
  12. Clean all of the sealing surfaces.
  13. If the exhaust manifold is being replaced, transfer the following parts:
    • The exhaust manifold heat shield
    • The oxygen sensor
    14. Fig 7: Secondary Air Injection Pipe Assembly
    GM2512855Courtesy of GENERAL MOTORS COMPANY
  14. Remove the secondary air injection pipe assembly bolts (2).
  15. Remove the secondary air injection pipe assembly (1).
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