Compressor Air Intake Turbocharger Cleaning and Inspection

Completely inspect the turbocharger and all other engine components that may cause similar conditions before replacing the turbocharger. Use the following information to diagnose problems. The turbocharger is serviced as a complete unit.

1. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   Oil residue on the turbocharger compressor wheel is normal with a closed PCV system.

   Clean the turbocharger mating surfaces (1, 2).

2. Courtesy of GENERAL MOTORS COMPANY

   Inspect for damage to the compressor wheel, compared to a normal compressor wheel.

3. Courtesy of GENERAL MOTORS COMPANY

   Inspect for damage to the compressor wheel, by a soft object.

4. Courtesy of GENERAL MOTORS COMPANY

   Inspect for damage to the compressor wheel, by a hard object.

5. Courtesy of GENERAL MOTORS COMPANY

   Inspect compressor blades for heavy rubbing.

6. Ensure that the following conditions do not exist on the compressor wheel blades:
   • Cracks
   • Bends
   • Erosion of the blades
   • Broken blades
7. Check the housing for signs of rubbing.
8. Clean the turbocharger inlet duct.
9. Clean the turbocharger inlet duct mating surfaces.
10. Inspect the turbocharger inlet duct for cracks.
11. Inspect the turbocharger inlet duct mating surfaces for damage.