Compressor Wheel
Inspect compressor wheel (7), for cracked, bent or
damaged blades.
Replace with new if any damage found.
HX25/25W/27W Service Repair Manual Turbocharger Service and Overhaul
5:9
Compressor Housing
Inspect internal profile of compressor housing (8), for
scoring damage due to possible contact with
compressor wheel. Check retaining ring, compressor
housing (91) groove is free from deposits.
Return to Component Cleaning if deposits remain.
Replace with new if profile damage is visible.
Ensure position of compressor housing retaining ring
groove has not been compromised by wear.
Check bearing housing location pin is not bent or
loose. Replace if damaged.
Turbine Housing
M8 x 1.25 (13 mm)
Check bearing housing location pin is not bent or
loose. Replace if damaged.
Inspect the turbine housing (5) profile for damage
caused by possible contact with the rotor. Inspect the
outer and internal walls for cracks or flaking caused by
overheating.
Check turbine housing inlet flange flatness is within
0.1 mm (0.004 in). Check flange threaded holes with an
M8 x 1.25 thread gauge.
Replace with new if any of the above features are non
compliant.
Caution
Do not attempt to straighten blades.
Caution
Good groove and abutment face condition are critical
to the integrity of compressor housing to bearing
housing joint.
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