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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.
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Vacuum pump drive
Intake/exhaust CamshaftsCamshaft sprocketFinger follower & HLA
Components
Cylinder head
Camshaft position sensorHP pump drive gear
Cylinder head gasket
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Chain upper bush
Chain type: single bush
Chains: 112 EA
Hydraulic tensioner
Contains tensioner housing
plug, spring and check valve,
and operated by hydraulic
pressure
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 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.
Oil pump sprocket
Teeth: 30 EA
Tensioner rail
Installed between exhaust
Camshaft sprocket and
crankshaft sprocket
Crankshaft sprocket
Teeth: 21 EA
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Intake/exhaust Camshaft assembly
Components
Intake Camshaft
HP pump drive gearExhaust
Camshaft
Connected to
vacuum pump
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Timing gear cover case (TGCC)
TGCCOil seal
Screw plug
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Mass Balance Unit (MBU)
Fuel HP pump
HP pump gear
Crankshaft MBU
drive gear
MBU
HP pump
drive gear
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Oil pan assembly
8. OIL PAN
The oil pan in D20DTF engine improves the noise and vibration. Especially, the oil drainage is very easier
than before. And, A/C compressor bracket and the oil dipstick tube are mounted on the oil pan.
Components
Oil drain plug
Dust cover
A/C compressor bracket
Oil dipstick tube hole
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9. MASS BALANCE SHAFT UNIT (MBU)
The balance shaft in MBU (Mass Balance shaft Unit) improves the NVH performance by decreasing
the unbalanced force.
Components
MBU drive gear
Mass balance shaft unit
Mass balance shaft unit