Page 197 of 1336
0000-00
1. SPECIFICATION
Unit Description Specification Remark
Cylinder head Height 131.9 to 132.1mm
Flatness below 0.1mm
Flatness on
manifold sideIntake manifold 0.1/150mm
Exhaust manifold 0.15mm
Mass balance
shaft (MBU)Backlash 0.05 to 0.15mm
Connecting rod End play 0.05 to 0.31mm
Camshaft Axial end play Intake 0.1 to 0.35mm
Exhaust 0.1 to 0.35mm
Camshaft position
sensorDistance between Camshaft position
sensor and sprocket0.20 to 1.80mm
Valve Clearance
between valve
and pistonIntake Approx. 0.7mm
Exhaust Approx. 0.8mm
Valve recess Intake 0.6 to 1.0mm
Exhaust 0.6 to 1.0mm
Cylinder block Piston protrusion 0.475 to 0.745mm
Piston ring TOP ring end gap 0.20 to 0.35mm
2nd ring end gap 0.35 to 0.50mm
3rd ring end gap 0.2 to 0.40mm
Offset 0.3mm
Head gasket Piston protrusion 0.475~0.540 1.2t
0.541~0.649 1.3t
0.650~0.745 1.4t
Page 201 of 1336
0000-00
Knock sensor2-
Cam position sensor
1 10~14Nm -
T-MAP pressure sensor
1-
Exhaust manifold M8 10
-
Turbocharger M8 3
-
T/C support bracket bolt
1
-
T/C support bracket bolt
M8 1
-
T/C oil supply pipeM6(block side) 1
-
M6(turbo side) 1
-
T/C oil return pipe
(turbo side)2-
(block side)2-
EGR valve
3-
EGR pipe bolt
(Intake side)
2-
EGR pipe bolt
(EGR cooler side)
2-
Oil pressure sensor M24 1 Max. 50Nm -
Component Size
QuantityTightening torque
(Nm)Remark
(Total torque)
Hot water inlet pipe
2-
Alternator
1Lower
1Upper
A/C compressor
4-
A/C bracket
4-
Intake manifold
2-
6-
Oil filter module
6-
1-
2-
Page 202 of 1336
Oil gauge tube1-
Oil filter cap 1
-
Fuel rail
2-
Injector clamp bolt
2-
High pressure pipe
(between HP pump and
fuel rail)M17 1
-
High pressure pipe
(between fuel rail and
injector)M17 4
-
Crank position sensor
1-
Main wiring
5-
Intake duct M8x25 3
-
Power steering pump
3-
Mass balance shaft
(MBU)
6-
Cylinder head front cove
r5-
Timing gear case cover
7-
1-
3-
Cylinder head cover
21-
Component Size
QuantityTightening torque
(Nm)Remark
(Total torque)
Idle pulley/Tensioner
pulley1
-
Glow plug M5 4
-
Vacuum pump
3-
Page 207 of 1336

0000-00
4. CHECK AND INSPECTION
1) Cylinder
(1) Compression pressure test
Specified value
Compression ratio
16.5 : 1
Test condition
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 Specified value
Whole engine below 25%
at valve and cylinder head gasket below 10%
at piston ring below 20%
Page 209 of 1336
0000-00
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.
Page 215 of 1336
0000-00
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
Page 217 of 1336
0000-00
6. CYLINDER HEAD
Cylinder head contains cam position sensor, vacuum pump, intake manifold, exhaust manifold and valve
assembly. Vacuum pump and the high pressure (HP) pump are driven by Camshaft and valves are
install in vertical direction. This enables the compact layout in cylinder head assembly.
Page 218 of 1336
Vacuum pump drive
Intake/exhaust CamshaftsCamshaft sprocketFinger follower & HLA
Components
Cylinder head
Camshaft position sensorHP pump drive gear
Cylinder head gasket