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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Intake Manifold Cleaning and Inspection >> Upper Intake Manifold Cleaning Procedure

Upper Intake Manifold Cleaning Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove any remaining gasket and/or gasket material from the following:
    • Throttle body
    • Intake manifold
  2. Clean the following intake manifold areas in solvent.
    • Intake manifold gasket sealing areas
    • Intake manifold passages
    • Brake booster hose passage
    • Evaporative emission (EVAP) solenoid passage
    • Positive crankcase ventilation (PCV) vacuum hose passages
    • Barometric pressure (BARO) sensor passage
    3. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  3. Dry the upper intake manifold and throttle body with compressed air.
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