Page 113 of 1082
02-6
품명 규격 볼트
수량규정토오크(Nm) 비고
(총 토오크)
Oil gauge tubeM6×16110 ± 1Nm-
Oil filter cap 125 ± 2.5Nm-
Fuel railM8×35225 ± 2.5Nm-
Injector clamp boltM6×6029 ± 1.0Nm
130˚ + 10˚-
High pressure pipe
(between HP pump and
fuel rail)M17 130 ± 3Nm
-
High pressure pipe
(between fuel rail and
injector)M17 430 ± 3Nm
-
Crank position sensor
M5×1418 ± 0.4Nm
-
Main wiringM6×16510 ± 1Nm-
Intake duct M8x25 325 ± 2.5Nm-
Power steering pumpM8×100325 ± 2.5Nm-
Mass balance shaft
(MBU)M8×45630 ± 3Nm-
Cylinder head front cove
rM6×10510 ± 1Nm-
품명 규격볼트
수량규정토오크(Nm)비고
(총 토오크)
Timing gear case coverM6×40710 ± 1Nm-
M6×45110 ± 1Nm-
M6×50310 ± 1Nm-
Cylinder head coverM6×352110 ± 1Nm-
Component Size
QuantityTightening torque
(Nm)Remark
(Total torque)
Idle pulley/Tensioner
pulley145 ± 4.5Nm
-
Glow plug M5 420 ± 2Nm-
Vacuum pumpM8×25310 ± 1Nm-
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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 121 of 1082

02-14
4. GUIDELINES ON ENGINE SERVICE
To prevent personal injuries and vehicle damages that can be caused by mistakes during engine and
unit inspection/repair and to secure optimum engine performance and safety after service works, basic
cautions and service work guidelines that can be easily forgotten during engine service works are
described in.
Cautions before service works
For safe and correct works, you must observe the working procedures and instructions in this
manual. And, use the designated tools as follow:
Engine stand / Heavy duty engine jack
To prevent the engine from starting abruptly, do not allow anybody to get in the vehicle while
servicing in engine compartment.
Before work on engine and each electrical equipment, be sure to disconnect battery negative (-)
terminal.
Before service works, be sure to prepare the works by cleaning and aligning work areas.
Do not allow the foreign material get into the fuel injection system.
When removing the engine, use only the safety hook on engine and engine hanger. Do not support
the bottom of oil pan with a jack.
Engine and accessories ▶
-
-
-
-
-
-
▶
Completely drain the engine oil, coolant and fuel from engine before removal.
Before disassembling/assembling the engine components, carefully read the working procedures in
this manual.
Make sure to keep the specified tightening torques during installation.
Clean and properly lubricate the parts before reassembly.
Carefully check that there are not any interference while servicing. -
-
-
-
- Engine has a lot of precise portions so tightening torque should be correct during disassembly/assembly
and removal/installation and service work should be done in clean ways during disassembly/assembly.
Maintaining working area clean and cautious service administration is essential element of service works
while working on the engine and each section of the vehicle. So the mechanics should well aware of it.
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02-150000-00
Electrical equipment ▶
Electric devices should be handled more carefully.
Currently, the engine has a lot of electric devices. there could be poor engine performance, incomplete
combustion and other abnormal symptoms due to short circuit or poor contact.
Before work on engine and each electrical equipment, be sure to disconnect battery negative (-)
terminal.
When replacing the electric device, use only genuine part and check the conditions of connections
and grounds. Loosened connection or ground make cause a fire and personal injury. -
-Fuel and lubrication system ▶
Do not allow the fluid and engine oil to make contact with the body paintwork and hoses.
If work on the fluid system such as fuel and oil, working area should be well ventilated and smoking
should be prohibited.
Gasket or seal on the fuel/lubrication system should be replaced with new ones and bolts and nuts
should be tightened as specified.
After removal/installation works, be sure to check whether there is leak on the connecting section. -
-
-
-
If fine dust or foreign material enters into DI engine's fuel system, there can be serious damages in HP
pump and injectors. Thus, be sure to plug the inlets of removed fuel line components with cap and
protect removed parts not to be contaminated with dirt. (Refer to cleanness in this manual while working
on DI engine fuel system)
Page 123 of 1082
02-16
with EPS (electric power steering)
1. BELT SYSTEM
The belt system is a single belt drive system which uses single belt and has components on the oil filter
housing as FEAD (Front End Accessories Drive) type.
Components ▶
HPS EPS
1 Crankshaft pulley (DDU)
2 Auto tensioner
3 Tensioner pulley
4 Vacuum pulley
5 A/C compressor pulley
6 Alternator pulley
7 Water pump pulley
8 NO. 1 idler pulley
9 NO. 2 idler pulley
10 Power steering pump -
with HPS (hydraulic power steering)
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 127 of 1082
02-20
5. CYLINDER HEAD COVER AND OIL SEPARATOR
The cylinder head cover is made by high strength plastic to reduce the weight. The multi twist type oil
separator improves the oil consumption.
Components ▶
Oil separator
PCV valve
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02-230000-00
Chain upper bush
Chain type: single bush
Chains: 112 EA
Tensioner rail
Installed between exhaust
Camshaft sprocket and
crankshaft sprocket
Hydraulic tensioner
Contains tensioner housing
plug, spring and check valve,
and operated by hydraulic
pressure
Crankshaft sprocket
Teeth: 21 EA
Exhaust Camshaft sprocket
Teeth: 42 EA
Clamping rail
Installed between exhaust
Camshaft sprocket and
crankshaft sprocket
7. CHAIN AND GEAR DRIVE SYSTEM
D20DTF engine uses single stage chain drive system. Timing chain drives the exhaust side and gear drive
the intake side. Timing chain is single bush type. Upper chain drives HP pump connected to intake
Camshaft by driving exhaust cam shift sprocke, and lower chain drives oil pump to lubricate the engine.
And, MBU (Mass Balance shaft Unit) drive gear drives MBU.
Components ▶
Chain lower bush
Chain type: single bush
Chains: 60 EAOil pump sprocket
Teeth: 20 EA
Mechanical type tensioner
Operated by internal spring
The timing links (gold color) on the timing chain are aligned with the timing marks on the
crankshaft sprocket and the camshaft sprocket whenever the crankshaft rotates 8 turns.