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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1511 (Engine Controls (Introduction) -- 5.7L) >> Repair Instructions >> Secondary Air Injection (AIR) Check Valve/Pipe Replacement - Bank 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the check valve clamp.
    2. Fig 1: AIR Hose, AIR Pipe & Check Valve
    GM59582Courtesy of GENERAL MOTORS CORP.
    CAUTION: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.
  2. Disconnect the secondary air injection (AIR) hose from the check valve.
  3. Unscrew the check valve from the AIR pipe.
  4. Remove the left AIR pipe from the manifold.
  5. Before replacing a check valve, test the valve for proper operation.
    1. Install a vacuum pump to the nipple side of the check valve, AIR pump side.
    2. Pump the vacuum pump to 10 in Hg and observe the gage.
    3. Replace the check valve if the vacuum bleeds down to zero within 5 seconds.
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