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Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the intake manifold mating surfaces.
  2. Inspect the intake manifold for damage.
  3. Inspect the intake manifold for cracks near metallic inserts.
  4. Inspect the crankcase ventilation passages in the intake manifold face for blockage.
    Fig 1: Inspecting Intake Manifold
    G01580722Courtesy of GENERAL MOTORS CORP.
  5. Clean the crankcase ventilation passages with compressed air if necessary. Use a maximum of 172 kPa (25 psi) of air pressure.
  6. Replace the intake manifold as necessary.
    Fig 2: Cleaning Crankcase Ventilation Passages
    G01580723Courtesy of GENERAL MOTORS CORP.
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