Page 100 of 1082
01-4
2. MAJOR COMPONENTS
Front View ▶
Vacuum pump
Oil filter assembly
Camshaft position sensor
Power steering pump pulley
Water pump pulley
Alternator pulley
Idler pulley No. 1
A/C compressor pulley
Auto tensioner
Idler pulley No. 2
Isolation damper
Rear View ▶
E-EGR valve
Fuel temperature sensor
Fuel HP pump assemblyE-VGT actuator
Coolant temperature sensor
IMV valve
Magnetic triggering
Crankshaft position sensor
Page 101 of 1082
01-50000-00
Right side View ▶
Wide band oxygen sensor
Pre-CDPF pressure port
Rear exhaust gas temperature
sensor
CDPF assembly
E-VGT turbocharger Post-CDPF pressure port
Oil drain plug
Left side View ▶
Thermostat assembly
Knock sensor 1 connector
Variable swirl valve assemblyOil cooler assembly
E-EGR valve
Knock sensor 2 connector
E-EGR solenoid valve
EGR cooler
Electronic throttle body
T-MAP sensor
Oil level switch
Front exhaust gas temperature
sensor
Page 111 of 1082
02-4
2. TIGHTENING TORQUE
Component Size
QuantityTightening torque
(Nm)Remark
(Total torque)
Main bearing capM12×821055 ± 5Nm,
180˚Not re-usable
Connecting rod capM9×52840 ± 5Nm,
90˚ ± 10˚50~80Nm
Crankshaft rear cover
M6×20610 ± 1Nm-
Oil pumpM8×35325 ± 2.5Nm-
FlywheelM10×22845 ± 5Nm,
90˚ ± 10˚Not re-usable
Isolation damper center
boltM18×501200 ± 20Nm,
180˚ ± 20˚660~720Nm
Not re-usable
Oil panM6×201810 ± 1Nm-
M6×35210 ± 1Nm-
M6×85210 ± 1Nm-
M6×120210 ± 1Nm-
M8×40225 ± 2.5Nm-
HP pump main nutM14×1.5-8-11650 ± 5Nm-
HP pump mounting bolt
M8×553
25 ± 2.5Nm-
Cylinder headM13×1501285Nm
270° ± 10°-
Camshaft capM6×301610 ± 1Nm-
M8×60425 ± 2.5Nm-
Exhaust stud bolt 1015 ± 1.5Nm-
Exhaust sprocket boltM11×40130 ± 3Nm-
Chain tensioner screw
plugM38×1.5125 ± 2.5Nm
-
Coolant temperature
sensor120 ± 2.0Nm-
Belt auto tensionerM8×30(LOW)125 ± 2.5Nm-
M10×75(Upper)155 ± 5.5Nm-
Coolant pumpM6×50710 ± 1.0Nm-
Page 118 of 1082

02-110000-00
3. CHECK AND INSPECTION
1) Cylinder
(1) Compression pressure test
Specified value ▶
Compression ratio
16.5 : 1
Test conditionat normal operating temperature (80˚C)
Compression pressureStandard32 bar
Minimum18 bar
Differential limit between cylindersMaximum 3 bar
The compression pressure test is to check the conditions of internal components (piston, piston ring,
intake and exhaust vale, cylinder head gasket). This test provides current engine operating status.
Before cranking the engine, make sure that the test wiring, tools and persons are keeping away from
moving components of engine (e.g., belt and cooling fan).
Park the vehicle on the level ground and apply the parking brake.
Do not allow anybody to be in front of the vehicle. -
-
-
(2) Cylinder pressure leakage test
If the measured value of the compression pressure test is not within the specifications, perform the
cylinder pressure leakage test.Specified value ▶
Perform this test in the sequence of firing order.
Do not test the cylinder pressure leakage with wet type test procedure. (do not
inject the engine oil into the combustion chamber) -
-
Test condition: normal engine operating
temperature (80˚C)Specified value
Whole engine below 25%
at valve and cylinder head gasket below 10%
at piston ring below 20%
Page 124 of 1082
02-170000-00
EGR cooler bypass valve
Exhaust gas goes to combustion
chamber without through EGR
cooler in engine cooled, and the
valve is closed by vacuum
pressure.
2. VACUUM PUMP
Vacuum pump generates the vacuum pressure and supplies it to EGR cooler bypass solenoid. This
pump is single vane type and displacement is 210 cc/rev. The lubrication oil is supplied through the hole
in hollow shaft.
Components ▶
Vacuum pump
Pump capacity: 210 cc/rev
Speed: 375 to 3,000 rpm
Lubrication temperature:
-40 to 155°C
Oil: 5W30
Drive type: Driven by exhaust
Camshaft sprocketBrake booster
Page 157 of 1082

03-22
(2) Di engine and its expected problems and remedies can be caused by
water in fuel
System supplement against paraffin separation ▶
In case of Diesel fuel, paraffin, one of the elements, can be separated from fuel during winter and then
can stick on the fuel filter blocking fuel flow and causing difficult starting finally. Oil companies supply
summer fuel and winter fuel by differentiating mixing ratio of kerosene and other elements by region and
season. However, above phenomenon can be happened if stations have poor facilities or sell improper
fuel for the season. In case of DI engine, purity of fuel is very important factor to keep internal
preciseness of HP pump and injector.
Accordingly, more dense mesh than conventional fuel filter is used. To prevent fuel filter internal clogging
due to paraffin separation, SYMC is using fuel line that high pressure and temperature fuel injected by
injector returns through fuel filter to have an effect of built-in heater (see fuel system).
System supplement and remedy against water in fuel ▶
As mentioned above, some gas stations supply fuel with excessive than specified water. In the
conventional IDI engine, excessive water in the fuel only causes dropping engine power or engine
hunting. However, fuel system in the DI engine consists of precise components so water in the fuel can
cause malfunctions of HP pump due to poor lubrication of pump caused by poor coating film during high
speed pumping and bacterization (under long period parking). To prevent problems can be caused by
excessive water in fuel, water separator is installed inside of fuel filter. When fuel is passing filter, water
that has relatively bigger specific gravity is accumulated on the bottom of the filter.
Water drain from water separator ▶
If water in the separator on the fuel filter exceeds a certain level, it will be supplied to HP pump with fuel,
so the engine ECU turns on warning lamp on the meter cluster and buzzer if water level is higher than a
certain level.
Due to engine layout, a customer cannot easily drain water from fuel filter directly, so if a customer
checks in to change engine oil, be sure to perform water drain from fuel filter.
Water separator
Page 168 of 1082
04-50000-00
3) Troubleshooting Sequence
The basic checks for intake system are as follows:
Basic Checks for Intake System ▶
Make sure to replace or clean the air cleaner
element periodically. Otherwise, engine will be
derated or work abnormally because of low
intake air volume.
Unlike the fuel system, which is a closed
circuit, the intake system is an open circuit
system. Therefore any malfunction may occur
due to dust and dirt.
Most of the connections consist of hoses so
the system cannot withstand high temperature
and pressure. Also it can be deformed or
loosened easily because it is a clamp
mounting system. Thus, when checking the
engine, basic inspections, such as tightened
status check and visual inspection for hose,
etc., should be carried out in advance.
Other Checks for Intake System ▶
If the intake system is free of any faults, check
for EGR and PCV oil separator.
Page 181 of 1082

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.