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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 2 >> 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 intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
    2. CAUTION: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.
  2. Remove the clamps and secondary air injection (AIR) hoses from the AIR system right pipe.
    3. Fig 1: Cylinder Head & Air Pipe Bolt
    GM63229Courtesy of GENERAL MOTORS CORP.
  3. Remove the AIR pipe bolt from the cylinder head.
    4. Fig 2: Right Air Pipe
    GM59633Courtesy of GENERAL MOTORS CORP.
  4. Remove the right AIR pipe from the manifold.
  5. Unscrew the check valve from the AIR pipe.
  6. 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 inches Hg and observe the gage.
    3. Replace the check valve if the vacuum bleeds down to zero within 5 seconds.
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