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Lower Intake Manifold Cleaning and Inspection

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    Fig 1: View Of Lower Intake Manifold
    GM1608919Courtesy of GENERAL MOTORS CORP.
  1. Clean the intake manifold gasket mating surfaces (3). Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cleaners.
  2. Clean the fuel injector bores (1).
  3. Inspect the lower intake manifold locating pins (2) for damage. Replace as necessary.
  4. Inspect the intake manifold for damage.
    5. NOTE: If replacing the lower intake manifold, make sure to transfer or replace the locating pins as necessary.
  5. Repair or replace the intake manifold as necessary.
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