SSANGYONG 2004 Rexton 2.7XDi, Workshop Manual

Page: 177 / 1991

DI04-10
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
EXHAUST SYSTEM
DI ENG SM - 2004.4
Diagnosis and Maintenance for Turbo Charger System
Cautions During Driving
The following lists cautions to take during test drive and
on the turbo charger vehicle, which must be considered
during the operation;
1. It’s important not to drastically increase the engine
rpm starting the engine. It could make rotation at
excessive speed even before the journal bearing is
lubricated and when the turbo charger rotates in poor
oil supply condition, it could cause damage of bearing
seizure within few seconds.
2. If the engine is running radically after replacing the
engine oil or oil filter brings poor oil supply condition.
To avoid this, it’s necessary to start off after idling
the engine for about 1 minute allowing oil to circulate
to the turbo charger after the replacement.
3. When the engine is stopped abruptly after driving at
high speed, the turbo charger continues to rotate in
condition where the oil pressure is at ‘0’. In such
condition, an oil film between the journal bearing and
the housing shaft journal section gets broken and
this causes abrasion of the journal bearing due to the
rapid contact. The repeat of such condition significantly
reduces life of the turbo charger. Therefore, the engine
should be stopped possibly in the idle condition.
Notice
After string for long period of time during winter
season or in the low temperature condition where
the fluidity of engine oil declines, the engine,
before being started, should be cranked to
circulate oil and must drive after checking the oil
pressure is in normal condition by idling the
engine for few minutes.
Inspection of Turbo Charger
When problem occurs with the turbo charger, it could cause
engine power decline, excessive discharge of exhaust gas,
outbreak of abnormal noise and excessive consumption
of oil.
1. Inspection when installed
- Check the bolts and nuts foe looseness or missing
- Check the intake and exhaust manifold for
looseness or damage
- Check the oil supply pipe and drain pipe for
damages
- Check the housing for crack and deterioration
2. Inspection of turbine in turbo charger
Remove the exhaust pipe at the opening of the turbine
and check, with a lamp, the existence of interference
of housing and wheel, oil leakage and contamination
(at blade edge) of foreign materials.
- Interference: In case where the oil leak sign exists,
even the small traces of interferences on the
turbine wheel mean, most of times, that abrasion
has occurred on the journal bearing. Must inspect
after overhauling the turbo charger.
- Oil Leakage: Followings are the reasons for oil
leakage condition;
• Problems in engine: In case where the oil is
smeared on inner wall section of the exhaust
gas opening.
• Problems in turbo charger: In case where the
oil is smeared on only at the exhaust gas
outlet section.
Notice
Idling for long period of time can cause oil
leakage to the turbine side due to low pressure of
exhaust gas and the rotation speed of turbine
wheel. Please note this is not a turbo charger
problem.