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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 4.6L - Introduction (2 Of 2)) >> Repair Instructions >> Secondary Air Injection Check Valve Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Engine Harness Electrical Connectors
    GM1665457Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Disconnect the engine harness electrical connector (4) from the secondary air injection (AIR) check valve.
    3. Fig 2: View Of AIR Pipe Outlet Pipe
    GM1665399Courtesy of GENERAL MOTORS CORP.
  3. Pinch the constant tension clamp (1) and remove the AIR pipe from the AIR check valve.
    4. Fig 3: Identifying AIR Check Valve
    GM1670476Courtesy of GENERAL MOTORS CORP.
  4. Remove the AIR check valve to exhaust manifold nuts (3).
  5. Remove the AIR check valve bolts (1).
  6. Remove the AIR check valve.
  7. Remove and discard the AIR check valve to exhaust manifold gasket (4).
  8. Clean the AIR to exhaust manifold gasket sealing surfaces.
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