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01-90000-00
4. CAUTION WHEN SERVICING THE ENGINE
1) Cleaness
Engine has a lot of precisely machined (grinding, polishing, lapping) surfaces. Thus, there should be
great cautions for cleaness when servicing the engine components. Apply the engine oil on the sliding
surfaces when assemblying the components. Every component should be disassembled and
reassembled in accordance with the correct sequences. Before servicing the engine, the negative
cable should be diconnected from the battery. Otherwise, some electric or electronic components
could be damaged.
2) Servicing
Before service work, be sure to disconnect battery negative (-) terminal to prevent damages by bad
wire and short.
To prevent the foreign material from getting into engine cylinder, cover the inlet of air cleaner if the
air cleaner has been removed.
(1) Lifting up the vehicle
Always keep the safety precautions.
To prevent the vehicle from rolling down, put the chocks under the tires (when using a 4-post lift).
Make sure to support the correct lifting points (when using a 2-post lift) -
-
-
(2) Exhaust system
Wear the safety glove when removing the exhaust pipe.
Make sure that the exhaust pipe is cooled before removing it. -
-
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01-10
(3) Cautions before service
Prolonged exposure to the engine oil make cause a skin cancer or an irritation.
Used engine cotains the hazardous material that may cause the skin cancer. Do not allow the used
engine to make contact with your skin.
Make sure to wear the protection gloves and goggle when handling the engine oil. If contact
happens, rinse affected areas immediately with plenty of water. Do not wash it with gasoline or
solvent. If irritation persists, consult a doctor.
Improperly disposed engine oil can pollute the environment. Dispose used engine oil in accordance
with local environmental regulations. -
-
-
(5) Tightening the fastener
If fine dust or foreign material enters into DI engine's fuel system, there can be serious damages
between HP pump and injectors. So, be sure to cover removed fuel system 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)
When working on the fuel line between priming pump and injector (including return line), always
plug the openings with caps to prevent foreign materials or dust from entering to the openings and
connections.
The HP fuel supply pipe (HP pump to fuel rail) and HP fuel pipe (Fuel rail to injector) should be
replaced with new ones when removed. 1.
2.
3. Scalding hot coolant and steam could be blown out under pressure, which could cause serious injury.
Never remove the coolant reservoir cap when the engine and radiator are hot.
(4) Lubrication system
3) Fuel and Oil System
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. -
-Clean the mating surfaces before tightening.
Place the marks with paint to tighten by angle if the angle wrench is not available. 1.
2.
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01-150000-00
7. CODING AND INITIALIZATION
1) Engine Variant Coding
Unit Selection Description
PTC auxiliary heater NO For PTC auxiliary heaterequipped vehicle,
select"YES".
YES
Glow plug Relay (K-line) Select "AQGS".
AQGS (CAN)
Transmission MT 5-speed Select the appropriate system.
MT 6-speed
AT 5-speed (DC 5AT)
AT 6-speed (DSI 6AT)
AT 7-speed (DC 7AT)
Pressure sensor
forA/C refrigerantNOSelect “Refrigerant pressure sensor”.
Refrigerant Pressure Sensor
Immobilizer NO Select "YES" if the vehicle has
immobilizer.
YES
Vehicle speed input
typeCAN Select "CAN" if the vehicle has ABS or
ESP
WIRE
Cooling fan Relay Select "PWM".
PWM
Auto cruise NO Select "YES" if the vehicle hascruise
control.
YES
Engine level control NO Select "NO".
YES
G-sensor NOABS: Select “NO”.
4WD ABS or ESP: Select “YES”.
YES
SMART key NO Select "NO".
YES
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01-170000-00
Unit Selection Description
Sedan/Limousine Sedan (RV) Select "Sedan (RV)".
Limousine
Vehicle code
(Platform)Rodius Select "Rodius".
Rexton
Korando C
Kyron
Korando Sport
Vehicle code (Engine) D32DTSelect “D20DTR”.
D27DT
D27DTP
D20DTR
ECU coding status ECU not codedSelect “ECU coded”.
ECU coded
Signal not valid
Not defind
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02-30000-00
Cylinder block Piston protrusion 0.475 to 0.745mm -
Piston ring TOP ring end gap 0.20 to 0.40 mm -
2nd ring end gap 0.35 to 0.50 mm -
3rd ring end gap 0.2 to 0.40 mm -
Offset 0.3mm -
Head gasket Piston protrusion 0.475 to 0.540 1.2t -
0.541 to 0.649 1.3t -
0.650 to 0.745 1.4t -
Valve Clearance between
valve and pistonIntake 1.12 mm -
Exhaust 1.09 mm -
Valve recess Intake 0.6 to 1.0 mm -
Exhaust 0.6 to 1.0 mm -
1. ENGINE ASSEMBLY
Unit Description Specification Remark
Cylinder head Height 131.9 to 132.1 mm -
Flatness below 0.1 mm -
Valve protrusion Intake valve 0.6 to 1.0 mm -
Exhaust valve 0.6 to 1.0 mm -
Flatness on manifold
sideIntake manifold 0.08 mm -
Exhaust manifold 0.08 mm -
Connecting rod End play 0.5 to 0.31 mm -
Camshaft
Axial end playIntake 0.1 to 0.35 mm -
Exhaust 0.1 to 0.35 mm -
Camshaft position
sensorDistance between Camshaft position
sensor and sprocket0.20 to 1.80 mm -
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02-4
2. MAJOR CHANGES
Rear Engine Mounting Insulator (for 4WD)
Design changed for reducing abnormal noise during driving
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02-8
4. CHECK AND INSPECTION
1) Cylinder
(1) Compression pressure test
Specified value ▶
Compression ratio16.5 : 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.
Measurement ▶
Warm the engine up to normal operating temperature (80°C).
Disconnect the fuel rail pressure sensor connector to cut off the fuel injection.
Remove the air cleaner duct and glow plugs. -
-
-
Place the diagram sheet to compression
pressure tester and install it into the plug
hole. 1. 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. -
-
-
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02-90000-00
(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%
Crank the engine for approx. 10 seconds by
using the start motor. 2.
Record the test result and measure the
compression pressure of other cylinders with
same manner. 3.
If the measured value is out of specified
value, perform the cylinder pressure leakage
test. 4.