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2) Cylinder Head
(1) Cylinder head mating surface check
Specified value
Total height "A"131.9 to 132.1 mm
Minimum height after machining131.9mm
FlatnessLongitudinal direction0.1 / 150
Transverse direction0.15
Parallel deviation of cylinder headbelow 0.1 mm
Peak-to valley of surfaceRmax7
Rz6.3
valve recess "a"Intake valve
0.6 to 1.0 mm
Exhaust valve
Measure the cylinder head height "A". 1.
If the height is less than the limit, the cylinder
head must be replaced. -
Insert the valves into the valve guides and
measure the recesses. 2.
If the measured value is out of the specified
range, machine the valve seat as much as
necessary until the specified value is
achieved. -
0.6 to 1.0 mm
(2) Cylinder head pressure Leak test
with compressed air to 2 bar.
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5. 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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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)
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with EPS (electric power steering)with HPS (hydraulic 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 -
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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:
Oil: 5W30
Drive type: Driven by exhaust
Camshaft solt
Brake booster
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Front mounting assembly
Location: Front side of transfer axle housing and front side of
sub frame
Right mounting assembly
Location: Engine block side and body side member
Rear mounting assembly
Location: Rear side of transfer axle housing and
front side of sub frame
3. ENGINE MOUNTINGS
D20DTF engine mounting is 4-point mounting type and supports the engine and transaxle.
Front and rear mountings are rubber type and support the torque reaction. Left and right mountings
support the power train rods and torque reaction. Additionally, right mounting is hydraulic type and
supports the engine vibration.
Components
Left mounting assembly
Location: Upper side of transfer axle housing and
body side member
LocationFront mounting
Location
BRKT-Right
MTG-4WD
LocationFront mounting
BRKT-Right
MTG-2WD
Front MTG MTFront MTG AT
LocationRight MTG-4WDRight MTG-2WD
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Intake manifold
4. INTAKE/EXHAUST SYSTEM
1) Intake Manifold
Intake manifold is installed on the cylinder head with 8 bolts. The variable swirl valve is introduced to
improve the EGR gas mixture and turbulence in combustion chamber and to decrease the exhaust gas.
2) Exhaust Manifold
Exhaust manifold is installed on the cylinder head with 10 stud bolts and nuts. EGR port is integrated in
cylinder head.Components
Exhaust manifold
Components
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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