TURBOCHARGER – INSPECTION AND ANALYSIS TURBINE (EXHAUST) HOUSING

CONDITION:
Broken bolts in turbine housing
CAUSE:
Excessive torque on bolts or incorrect tensile strength bolts used.

RECOMMENDATION:
REUSE AFTER THE BROKEN BOLTS ARE PROPERLY REMOVED FROM THE HOUSING:
If the threads are dam­ aged, repair with thread inserts and replace all of the bolts with new bolts.

CONDITION:
Turbine housing contact from turbine blades accom­panied by wear on turbine wheel O.D.
CAUSE:
Blade/housing contact due to worn or failed shaft bearing.

RECOMMENDATION:
REUSE:
If scoring is light, it may be possible to stone smooth. If not, replace the housing.

CONDITION:
Turbine housing cracked
CAUSE:
High exhaust temperature, material defect or me­chanical damage.

RECOMMENDATION:
REUSE:
If crack does not extend to outside of housing. Determine if high exhaust back pressure or air intake restriction has occurred prior to the replacement of a new turbocharger assem­bly. If two cracks are intersect­ ing, do not reuse.

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