D1146/D1146TI/DE08TIS
MAINTENANCE MANUAL
130
Printed in Jan. 2001 PS-MMA0415-E1A
(2) Intake system
z Check the inside of the intake system for foreign matters.
z Assemble each joint on the intake duct and air cleaner securely to prevent
air leaks.
(3) Exhaust system
z Check the inside of the exhaust system for foreign matters.
z Be sure to use heat resisting steel bolts and nuts. Do not interchange them
with ordinary steel bolts and nuts when performing reassembly operation.
Apply anti-seizure coating to the bolts and nuts.
z Assemble each joint on the exhaust pipes securely to prevent gas leaks.
4.4.7. Diagnostics and troubleshooting
Complaints Possible causes Corrections
1) Air cleaner element clogged Replace or clean
2) Restrictions in air duct Check and correct
3) Leakage at intake manifold Check and correct
4) Turbocharger seized up and not rotating
Disassemble/repair
or replace
5) Turbine blades and compressor blades coming in
contact with each other or damaged
Disassemble/repair
or replace
1. Excessive black smoke
6) Exhaust piping deformed or clogged Check and correct
1) Oil leak into turbine and compressor
Disassemble/repair
or replace
2. Excessive white smoke
2) Worn or damaged seal ring due to excessive wear
of bearing
Disassemble/repair
or replace
1) Gas leak at each part of exhaust system Check and correct
2) Air cleaner element restricted Replace or clean
3) Turbocharger fouled or damaged
Disassemble/repair
or replace
3. Low engine output
4) Leakage at discharge port on compressor side Check and correct
1) Rotor assembly coming in contact
Disassemble/repair
or replace
2) Unbalanced rotation of rotor
Disassemble/repair
or replace
3) Seized up
Disassemble/repair
or replace
4. Unusual sound or
vibration
4) Each joint loosened Check and correct
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