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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 166 (Engine Mechanical - 2.7L (L3B) - Repair Instructions (3 Of 3)) >> Repair Instructions >> Compressor Air Intake Turbocharger Overhaul >> Cleaning and Inspection Procedure

Cleaning and Inspection Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM5064740
    CAUTION:

    If a turbocharger has failed, clean any turbocharger debris or excessive oil from the charge air cooler system before installing the new turbocharger. Failure to clean debris from the charge air cooler system will cause severe turbocharger and engine damage upon startup.

    Completely inspect the turbocharger (1) and all other engine components that may cause similar conditions before replacing the turbocharger (1). Symptoms - Engine Mechanical

  2. Clean all mating surfaces.
  3. Inspect all threaded holes for damage.
  4. Inspect the compressor and turbine blades for bent or broken conditions, and foreign material. PCV fluids and combustion product buildup are common and not a sign of failure. Replace the turbocharger if damage is found.
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