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TURBOS — DIAGNOSTIC MATRIX
TYPES OF FAILURE
Turbos are often a symptom of another problem. If you don't address the cause of turbo failure, you may have to replace the turbo again.
PROBLEM INDICATOR
POSSIBLE CAUSE Leaking or damaged oil feed and drain line Restricted crankcase breathers Sludge or coke in the center housing Wastegate swing valve does not close Wastegate swing valve does not open
Wastegate valve defective
Foreign object damage to turbine or compressor
Exhaust gas leakage present between exhaust pipe and turbine outlet Engine air box cracked or missing
Turbine housing damaged Improper oil supply to turbo
Clogged catalytic
Defective piston ring seal Bearing damage of turbo
Increased blow by
Charge or compression air cooler dirty
Dirty air filter
Fuel management system defective or improperly adjusted
Worn engine components such as piston rings, valve guide, engine or cylinder liners worn
Turbine housing leakage
Turbo suction hose obstructed or pressure line leaking
Restricted flow in the exhaust system
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