8. TURBOCHARGER 8.5.2 Inspection procedure (1) Compressor housing (7) Inspect the compressor housing for any contact trace with the compressor impeller, surface defect, dent or crack at joint surface, and replace it if defective. (2) Turbine housing (11) Inspect any trace of contact with the turbine wheel, exfoliation due to degradation by oxida- tion of the cast surface, thermal deformation or crack. Replace with a new one of defective. (3) Compressor impeller (18) Inspect any contact trace, chipping, corrosion or deformation. Replace with a new one if defective. (4) Turbine shaft (1) 1) Inspect any contact trace, chipping, thermal discoloration or deformation at the turbine wheel.
Check the shaft portion for bend, the journal portion for thermal discoloration or abnormal wear, and the seal ring groove for surface defect or wear. Replace with a new one if defective. 2) Measure the turbine shaft journal outside diameter (A) and seal ring groove width (E). Replace with a new turbine shaft if beyond the wear limit. Wear limit of journal outside diameter (A) RHB51......7.98 mm RHB31......6.25 mm Wear limit of ring groove width (E) RHB51......1.29 mm RHB31......1.07 mm 3) Measure the turbine shaft run-out, and replace with a new turbine shaft if it exceeds 0.011 mm.
(5) Heat insulating plate (20) Inspect the heat insulating plate for any contact trace, thermal deformation or corrosion. Replace with a new one if defective. 82E-5 – 98E-5 SERIES 8-13