TURBOCHARGER - Inspection
EM-29flowchartInspection
Condition 1: Low engine power
Probable Cause
Corrective Action
Air leak at the connection of compressor housing and suction hose/inlet tube, or inlet tube and intake manifold
Correct the connection.
Exhaust gas leak at the connection of turbine housing and exhaust manifold, connecting tube or exhaust outlet
Correct the connection or replace gasket.
By-pass valve is stuck open.
Stuck or worn journal or bearing
Broken shaft
Sludge on back of tubine wheel
Broken turbine wheel
Replace turbocharger assembly.
Cause
Air leak at the connection of compressor housing and suction hose/inlet tube, or inlet tube and intake manifold
Fix
Correct the connection.
Cause
Exhaust gas leak at the connection of turbine housing and exhaust manifold, connecting tube or exhaust outlet
Fix
Correct the connection or replace gasket.
Cause
By-pass valve is stuck open.
Cause
Stuck or worn journal or bearing
Cause
Broken shaft
Cause
Sludge on back of tubine wheel
Cause
Broken turbine wheel
Fix
Replace turbocharger assembly.
Condition 2: Excessively high engine power
Probable Cause
Corrective Action
Disconnected or cracked rubber hose of by-pass valve controller
Correct or replace rubber hose.
By-pass valve is stuck closed.
Controller diaphragm is broken.
Replace turbocharger assembly.
Cause
Disconnected or cracked rubber hose of by-pass valve controller
Fix
Correct or replace rubber hose.
Cause
By-pass valve is stuck closed.
Cause
Controller diaphragm is broken.
Fix
Replace turbocharger assembly.