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Home >> Cadillac >> 2021 >> CT5 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 3.0L (LGY)) >> Repair Instructions >> Intake Manifold Replacement >> Inspection Procedure

Inspection Procedure

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  1. GM4165936Courtesy of GENERAL MOTORS COMPANY

    Inspect the intake manifold for the following conditions:

    • Damage to the intake manifold bolt holes (1)
    • Damage to the charge air cooler bolt holes (2)
    • Damage to the intake manifold core hole plug (3)
    • Damage to the intake manifold tube (4)
  2. GM4165939Courtesy of GENERAL MOTORS COMPANY

    Inspect the lower intake manifold for the following conditions:

    • Gouges or damage to the intake manifold sealing surfaces (1)
    • Damage to the intake manifold core hole plug (2)
    • Damage to the intake manifold locating pin (3)
  3. Inspect the lower intake manifold sealing surface for warpage.
    1. Locate a straight edge across the lower intake manifold sealing surface.
    2. Insert a feeler gauge between the lower intake manifold and the straight edge. An lower intake manifold with warpage in excess of 0.50 mm (0.020 in) must be replaced.
  4. Repair or replace the intake manifold as necessary.