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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 2.4L) >> Repair Instructions - Off Vehicle >> Intake Manifold Cleaning and Inspection (LEA, or LUK)

Intake Manifold Cleaning and Inspection (LEA, or LUK)

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Intake Manifold And Intake Manifold Insulator
    GM2512858Courtesy of GENERAL MOTORS COMPANY
  1. Clean the intake manifold (1) mating surfaces.
  2. Inspect the intake manifold for damage.
  3. Inspect the intake manifold for cracks near metallic inserts.
  4. Clean and inspect the intake manifold insulator (2) for damage.
  5. Fig 2: Crankcase Ventilation Passages
    GM2210032Courtesy of GENERAL MOTORS COMPANY
  6. Inspect the crankcase ventilation passages (1) in the intake manifold face for blockage.
  7. WARNING:

    Refer to Safety Glasses Warning .

  8. Clean the crankcase ventilation passages with compressed air if necessary. Use a maximum of 172 kPa (25 psi) of air pressure.
  9. Replace the intake manifold as necessary.