01 ENGINE
26
Turbocharger Diagnosis
Black Smoke
Dirty air fi lter system
Suction and pressure line distorted or leaking
Excessive fl ow resistance in exhaust system/leakage
upstream of turbine
Fuel system/injection feed system defective or incorrectly
adjusted
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Boost pressure control swing valve/poppet valve does not
close
Turbocharger bearing damage
Foreign body damage on compressor or turbine
Engine air collector cracked/missing or loose gaskets
Turbine housing/fl ap damaged
Insuffi cient oil supply of turbocharger
Lack of Power/Boost Pressure Low
Dirty air fi lter system
Suction and pressure line distorted or leaking
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Fuel system/injection feed system defective or incorrectly
adjusted
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Boost pressure control swing valve/poppet valve does not
close
Pipe assy. to swing valve/poppet valve defective
Turbocharger bearing damage
Foreign body damage on compressor or turbine
Engine air collector cracked/missing or loose gaskets
Turbine housing/fl ap damaged
Insuffi cient oil supply of turbocharger
Boost Pressure Too High
Fuel system/injection feed system defective or incorrectly
adjusted
Boost pressure control swing valve/poppet valve does not
open
Pipe assy. to swing valve/poppet valve defective
Compressor/Turbine Wheel Failure
Turbocharger bearing damage
Foreign body damage on compressor or turbine
Turbine housing/fl ap damaged
Insuffi cient oil supply of turbocharger
High Oil Consumption
Dirty air fi lter system
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Oil feed and drain lines clogged, leaking or distorted
Crankcase ventilation clogged and distorted
Coke and sludge in turbocharger center housing
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Piston ring sealing defective
Turbocharger bearing damage
Blue Smoke
Dirty air fi lter system
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Oil feed and drain lines clogged, leaking or distorted
Crankcase ventilation clogged and distorted
Coke and sludge in turbocharger center housing
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Piston ring sealing defective
Turbocharger bearing damage
Black and Blue Smoke
Dirty air fi lter system
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Turbocharger bearing damage
Oil Leakage at Turbine
Oil feed and drain lines clogged, leaking or distorted
Crankcase ventilation clogged and distorted
Coke and sludge in turbocharger center housing
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Piston ring sealing defective
Turbocharger bearing damage
Turbocharger noise
Suction and pressure line distorted or leaking
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Dirty compressor or charge air cooler
Turbocharger bearing damage
Foreign body damage on compressor or turbine
Exhaust gas leakage between turbine outlet and exhaust
pipe
Engine air collector cracked/missing or loose gaskets
Turbine housing/fl ap damaged
Insuffi cient oil supply of turbocharger
Oil Leakage at Compressor
Dirty air fi lter system
Excessive fl ow resistance in exhaust system/ leakage
upstream of turbine
Oil feed and drain lines clogged, leaking or distorted
Crankcase ventilation clogged and distorted
Coke and sludge in turbocharger center housing
Valve guide, piston rings, engine or cylinder liners worn/
increased blow by
Dirty compressor or charge air cooler
Piston ring sealing defective
Turbocharger bearing damage