SsangYong Korando III (2010 year). Manual - part 339

06-4

2. INSPECTION

1) Cautions During Driving

The following lists cautions to take during test drive and on the turbocharger vehicle, which must be 

considered during the operation.

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 turbocharger rotates in 

poor oil supply condition, it could cause damage of bearing seizure within few seconds.

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 turbocharger after the replacement.

When the engine is stopped abruptly after driving at high speed, the turbocharger 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 turbocharger. 

Therefore, the engine should be stopped possibly in the idle condition.

1.

2.

3.

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.

06-5

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2) Inspection of Turbocharger

On-board Inspection

1.

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

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Inspection of turbine

2.

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 turbocharger.

Oil Leakage: Followings are the reasons for oil leakage condition

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Problems in engine: In case where the oil is smeared on inner wall section of the exhaust gas 

opening.

Problems in turbocharger: In case where the oil is smeared on only at the exhaust gas

outlet section.

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*

When problem occurs with the turbocharger, it could cause engine power decline, 

excessive discharge of exhaust gas, outbreak of abnormal noise and excessive 

consumption of oil.

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 turbocharger 

problem.

Oil Drain Pipe Defect

In case where oil flow from the turbocharger sensor housing to the crank case is not smooth would 

become the reason for leakage as oil builds up within the center housing. Also, oil thickens (sludge) 

at high temperature and becomes the indirect reason of wheel hub section. In such case, clogging 

and damage of the oil drain pipe and the pressure of blow-by gas within the crank case must be 

inspected.

Damages due to Foreign Materials

When the foreign materials get into the system, it could induce inner damage as rotating balance of 

the turbocharger gets out of alignment.

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06-6

3) Inspection of Turbine

Thoroughly check the followings.

Interference: In case where is trace of interference or smallest damage on the compressor wheel 

means, most of times, that abrasion has occurred on the journal bearing. Must inspect after the 

overhaul.

Oil Leakage: The reason for oil leakage at the compressor section is the air cleaner, clogged by 

substances such as dust, causes the compressor inlet negative pressure.

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Rotating in high speed at no-load for extended period of time can cause oil leakage to the

compressor section as oil pressure within the center housing gets higher than pressure within the 

compressor housing.

Overuse of engine break (especially in low gear) in down hill makes significantly low exhaust gas 

energy compared to the time where great amount of air is required during idling conditions of the 

engine. Therefore, amount of air in the compressor inlet increases but the turbocharge pressure 

is not high, which makes negative pressure at the compressor section causing the oilleakage 

within the center housing.

a.

b.

No problem will occur with the turbocharger if above conditions are found in early stage but oil 

leaked over long period of time will solidify at each section causing to breakout secondary 

defects.

Damages by foreign materials: In case where the compressor wheel is damaged by foreign materials 

requires having an overhaul. At this time, it's necessary to check whether the foreign materials have 

contaminated intake/exhaust manifold or inside of engine.

Must absolutely not operate the turbocharger with the compressor outlet and inlet opened 

as it could damage the turbocharger or be hazardous during inspection.

06-7

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4) Possible Causes of Defect

The following tries to understand the defects that can occur with vehicle installed with the turbocharger 

and to manage the reasons of such defects.

In case where oil pan/oil pipe has been contaminated, oil filter is defected and where adhesive of 

gaskets has been contaminated into the oil line.

1.