Section 10 - Air Intake System Turbocharger - Cleaning and Inspection for Reuse (10-01) M11 Page 10-5 Turbocharger - Cleaning and Inspec- tion for Reuse (10-01) Cleaning Remove all carbon deposits and gasket material from surfaces (1), (2) and (3). Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Caution: Tape or plug all openings to prevent solvent or steam from damaging the oil cavities in the turbocharger. Use solvent or steam to clean the exterior of the turbo- charger. Dry with compressed air. Inspection Visually inspect the housings for damage.
Visually inspect the turbine wheel and compressor im- peller (1) for fretting, cracked or broken vanes. Turn the impeller in the direction shown with arrow (2), to inspect the turbine shaft for freedom of rotation. The shaft must rotate freely. Replace damaged parts. Measure the turbocharger shaft axial movement with the dial depth gauge, Part No. ST-537. Push the rotor assembly away from the gauge. Set the gauge on zero. Push the rotor assembly toward the gauge and record the data. Turbocharger Shaft Axial Movement mm in 0.038 MIN 0.0015 0.089 MAX 0.0035 Push the compressor impeller by hand toward the com- pressor housing.
Install a wire feeler gauge, at the minimum clearance point, between the impeller and the housing to measure the clearance. Record this clearance.