Chapter III Malfunction Diagnosis and Troubleshooting
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
99
Caution:
(1) It is not allowed to stop the diesel engine immediately or add coolant abruptly when the diesel engine
is overheating. Reduce the throttle and let the engine run with no load; stop the engine for further
inspection when the temperature of coolant in the cooling system is low.
(2) Do not remove the water filler cap while the diesel engine is still hot to prevent scalding. Take care
when adding coolant.
(3) If the reason for overheat can not be found and eliminated, contact the service station or the repair
factory, otherwise, it may cause damage to other parts.
10. Malfunction of the Diesel Engine Turbocharging System
Phenomenon and Cause of Malfunction
Troubleshooting
Insufficient
power
(1) Foreign materials in the oil depositing
at the sealing area of the
turbine side
(2) Excessive engine oil temperature,
insufficient oil supply, burning damage of
the floating bearing
(3) Blockage and deformation of the
turbocharger oil return hose, leading to oil
leakage
from
the
turbo
and
the
compressor shaft end
(4) Damage and malfunction of the
turbocharger sealing ring
(5) Turbo shaft rotor out of balance
(6) Friction and damage of the turbo
blades and the compressor blades
(7) Blockage of the air cleaner (too dirty)
(8) Too much dirt in the air intake/exhaust
pipes or leakage at the joint part
(9) Bad performance or damage of the
turbocharger
(1) Replace
the
engine
oil,
it
is
recommended to use API CI-4 or better oil
from Mobil Oil Corporation, overhaul the
turbocharger.
(2) Check the oil supply system; overhaul
the turbocharger.
(3) Repair or replace the fuel return hose.
(4) Replace the turbocharger sealing ring.
(5) Replace the turbocharger assembly.
(6) Replace the turbocharger assembly.
(7) Maintain the air cleaner; replace the
filter core.
(8) Wash, overhaul or replace the air
intake and exhaust pipe components.
(9) Overhaul or replace the turbocharger.
High fuel
consumption
(1) Too much dirt in the air intake/exhaust
pipes or leakage at the joint part
(2) Bad performance of the turbocharger
(3) Wear of the piston ring
(1) Overhaul the air intake and exhaust
pipes or replace the damaged parts.
(2) Wash,
adjust
or
replace
the
turbocharger.
(3) Check or replace the piston ring.
