Loss of power, excess smoke, high fuel consumption, overheating, high exhaust temperatures and oil leakages from the turbocharger are all symptoms that could indicate turbocharger malfunction. However, these faults are often wrongly attributed to the turbocharger because defects in other components can produce the same symptoms. The turbocharger performance can only be impaired by mechanical damage or blockage caused by dirt. This checklist provides a comprehensive list of the most common symptoms related to turbocharger failure. BEFORE replacing a turbocharger, verify the problem by consulting the chart below. If, after taking the appropriate action, problems still persist, please contact SCM Turbo for advice on 01484 345 345 Turbocharger Failure diagnosis Dirty Air Cleaner Clean or replace element according to manufacturer’s recommendations Restricted compressor intake duct Remove restriction or replace damaged parts as required Restricted air duct from compressor to intake manifold Replace seals, gaskets or tighten fasteners as required Restricted intake manifold Refer to engine manufacturer’s manual and remove restriction Air leak in feed from air cleaner to compressor Replace seals, gaskets or tighten fasteners as required Air leak in feed from compressor to intake manifold Replace seals, gaskets or tighten fasteners as required Air leak between intake manifold and engine Refer to engine manufacturer’s manual and replace gaskets or tighten fasteners as required Foreign object in exhaust manifold (from engine) Refer to engine manufacturer’s manual and remove obstruction Restricted exhaust system Remove restriction or replace damaged parts as required Exhaust manifold cracked, gaskets blown or missing Refer to engine manufacturer’s manual and replace gaskets or damaged parts as required Gas leak at turbine inlet/exhaust manifold joint Replace gasket or tighten fasteners as required Gas leak in ducting after turbine outlet Refer to engine manufacturer’s manual and repair leak Restricted turbocharger oil drain line Remove restriction or replace damaged parts as required Restricted engine crankcase breather Refer to engine manufacturer’s manual, clear restriction Turbocharger bearing housing sludged or coked Change engine oil and oil filter, overhaul or replace turbocharger as required Fuel injection pump or fuel injectors incorrectly set Refer to engine manufacturer’s manual and replace or adjust faulty components as required Engine valve timing incorrect Refer to engine manufacturer’s manual for correct settings and adjust as required Worn engine piston rings or liners Refer to engine manufacturer’s manual and repair as required Burnt valves and/or pistons Refer to engine manufacturer’s manual and repair as required Excessive dirt build-up on impeller and/or diffuser vanes Clean in accordance with the appropriate SCM repair manual Turbocharger damaged Find and correct cause of failure, repair or replace turbocharger as necessary – contact SCM Failed diaphragm Replace using correct Actuator Service Kit – contact SCM Siezed valve Free valve/replace complete turbine housing sub-assembly – contact SCM Leaking hose Replace hose and clips Wastegate mechanism set incorrectly Contact SCM Engine running hot Poor transient response Smoke Engine lacks power Black exhaust smoke Blue exhaust smoke High oil consumption Turbocharger noisy Cyclic sound from the turbocharger Oil leak from compressor seal Oil leak from turbine seal
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Loss of power, excess smoke, high fuel consumption, overheating,high exhaust temperatures and oil leakages from the turbochargerare all symptoms that could indicate turbocharger malfunction.However, these faults are often wrongly attributed to theturbocharger because defects in other components can produce thesame symptoms. The turbocharger performance can only beimpaired by mechanical damage or blockage caused by dirt.
This checklist provides a comprehensive list of the most commonsymptoms related to turbocharger failure. BEFORE replacing aturbocharger, verify the problem by consulting the chart below. If, after taking the appropriate action, problems still persist, please contact SCM Turbo for advice on 01484 345 345
Turbocharger Failure diagnosis
Dirty Air CleanerClean or replace element according to manufacturer’s recommendations
Restricted compressor intake ductRemove restriction or replace damaged parts as required
Restricted air duct from compressor to intake manifoldReplace seals, gaskets or tighten fasteners as required
Restricted intake manifoldRefer to engine manufacturer’s manual and remove restriction
Air leak in feed from air cleaner to compressorReplace seals, gaskets or tighten fasteners as required
Air leak in feed from compressor to intake manifoldReplace seals, gaskets or tighten fasteners as required
Air leak between intake manifold and engineRefer to engine manufacturer’s manual and replace gaskets or tighten fasteners as required
Foreign object in exhaust manifold (from engine)Refer to engine manufacturer’s manual and remove obstruction
Restricted exhaust systemRemove restriction or replace damaged parts as required
Exhaust manifold cracked, gaskets blown or missingRefer to engine manufacturer’s manual and replace gaskets or damaged parts as required
Gas leak at turbine inlet/exhaust manifold jointReplace gasket or tighten fasteners as required
Gas leak in ducting after turbine outletRefer to engine manufacturer’s manual and repair leak
Restricted turbocharger oil drain lineRemove restriction or replace damaged parts as required
Restricted engine crankcase breatherRefer to engine manufacturer’s manual, clear restriction
Turbocharger bearing housing sludged or cokedChange engine oil and oil filter, overhaul or replace turbocharger as required
Fuel injection pump or fuel injectors incorrectly setRefer to engine manufacturer’s manual and replace or adjust faulty components as required
Engine valve timing incorrectRefer to engine manufacturer’s manual for correct settings and adjust as required
Worn engine piston rings or linersRefer to engine manufacturer’s manual and repair as required
Burnt valves and/or pistonsRefer to engine manufacturer’s manual and repair as required
Excessive dirt build-up on impeller and/or diffuser vanesClean in accordance with the appropriate SCM repair manual
Turbocharger damagedFind and correct cause of failure, repair or replace turbocharger as necessary – contact SCM
Failed diaphragmReplace using correct Actuator Service Kit – contact SCM
Siezed valveFree valve/replace complete turbine housing sub-assembly – contact SCM
Leaking hoseReplace hose and clips
Wastegate mechanism set incorrectlyContact SCM
Engi
ne ru
nnin
g ho
t
Poor
tra
nsie
nt re
spon
se
Smok
e
Engi
ne la
cks
pow
er
Blac
k ex
haus
t sm
oke
Blue
exh
aust
sm
oke
High
oil
cons
umpt
ion
Turb
ocha
rger
noi
sy
Cycl
ic s
ound
from
the
turb
ocha
rger
Oil l
eak
from
com
pres
sor s
eal
Oil l
eak
from
turb
ine
seal
Related Documents
