Page 158 of 796
01-14
Name SizeNumbers of
fastenerTightening
torque (Nm)Note (total
tightening
torque)
Idler pulley/tensioner pulley 1 45±4.5Nm -
Glow plug M5 4 20±2Nm -
Vacuum pumpM8×25 3 10±1Nm -
Timing gear case coverM6×40 7 10±1Nm -
M6×45 1 10±1Nm -
M6×50 3 10±1Nm -
Cylinder head coverM6×35 21 10±1Nm -
Oil dipstick gauge coverM6×16 1 10±1Nm -
Oil filter cap 1 25±2.5Nm -
Fuel railM8×25 2 25±2.5Nm -
Injector clamp boltM6×44 2 9±1.0Nm
130˚±10˚ -
High pressure pipe
(between high pressure
pump and fuel rail
assembly)M17 1 30±3Nm -
High pressure pipe
(between fuel rail assembly
and injector)M17 4 30±3Nm -
Crankshaft position sensorM5×14 1 8±0.4Nm -
Main wiringM6×16 5 10±1Nm -
Intake ductM8×25 3 25±2.5Nm -
Power steering pumpM8×100 3 25±2.5Nm -
Cylinder head front coverM6×10 5 10±1Nm -
Ladder frameM8×16 5 30±3Nm -
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02-70000-00
Cylinder head coverM6×352110±1Nm-
Oil gauge tubeM6×16110±1Nm-
Oil filter cap 125±2.5Nm-
Fuel railM8×25225±2.5Nm-
Injector clamp boltM6×4429±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 sensorM5×1418±0.4Nm-
Main wiringM6×16510±1Nm-
Intake ductM8×25325±2.5Nm-
Power steering pumpM8×100325±2.5Nm-
Cylinder head front coverM6×10510±1Nm-
Ladder frame M8x16 530±3Nm-
Component SizeBolt
QuantitySpecified torque
(Nm)Remark
(Total torque)
Glow plug M5 420±2Nm-
Vacuum pumpM8×25310±1Nm-
Timing gear case coverM6×40710±1Nm-
M6×45110±1Nm-
M6×50310±1Nm-
Page 189 of 796
02-30
1) Chain Drive
(1) Overview
The drive chain is single chain drive system with simple design and variable performance, and it utilizes
the hydraulic tensioner to reduce the wave impact generated by the chain. This chain is light weight and
has high durability through single bush chain. Shoulder bolts are used for better NHV.
7. CHAIN AND GEAR DRIVE SYSTEM
D20DTR 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.
Page 190 of 796
02-310000-00
(2) Layout
Chain upper bush
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
Oil pump sprocket
Teeth: 33 EA
Chain lower bush
Chain type: single bush
Chains: 60 EA
Mechanical type tensioner
Operated by internal spring
Clamping rail
Installed between exhaust
Camshaft sprocket and
crankshaft sprocket
Exhaust camshaft
sprocket
Teeth: 42 EA
The brass links on timing chain are aligned with the timing marks on crankshaft sprocket and
camshaft sprocket by eight turns of crankshaft.
Page 191 of 796
02-32
2) Timing Chain and Gear
(1) Timing chain
Simple layout: optimized timing, enhanced
NVH
Single stage layout: minimized chain load
The brass link on crankshaft is at symmetric
position of that on camshaft. -
-
-
Chain upper bush
- Single bush type (112 EA)
Chain lower bush
- Single bush type (60 EA)
(2) Tensioner
Tensioner adjusts the chain tension to keep it tight during engine running. This reduces the wear in
guide rail and spoke.
Operating principle
- Use the spring tension in tensioner and hydraulic pressure
Tensioner type
- Compensation and impact absorbing
Static and dynamic force
- Spring + Hydraulic pressure 1.
2.
3.
Plunger
HousingSpring
Check valve
Hydraulic tensioner assembly ▶
Page 193 of 796
02-34
Screw plug
Oil sealTiming gear case cover
Timing gear case cover (TGCC)
(5) Timing gear case cover
Page 194 of 796
02-350000-00
Features
Major function: Protecting the chain drive system, minor function: Shielding the chain noise.
Install crankshaft front seal and screw plug on the timing gear case cover. ▶
-
-
Do not touch the inner lip of crankshaft front seal.
Be careful not to damage the screw thread when removing the lock pin to release the chain
tensioner.
Be careful not to damage the O-ring when installing the screw plug. -
-
-
A671 997 01 46
Crankshaft front seal
Location of chain tensioner
screw plug
Page 225 of 796

03-18
3. CAUTIONS FOR DI ENGINE
1) Cautions for DI Engine
This chapter describes the cautions for DI engine equipped vehicle. This includes the water separation
from engine, warning lights, symptoms when engine malfunctioning, causes and actions.
DI Engine 1.
Comparatively conventional diesel engines, DI engine controls the fuel injection and timing electrically,
delivers high power and reduces less emission.
System Safety Mode 2.
When a severe failure has been occurred in a vehicle, the system safety mode is activated to protect
the system. It reduces the driving force, restricts the engine speed (rpm) and stops engine operation.
Refer to "Diagnosis" section in this manual.
Engine CHECK Warning Lamp 3.
The Engine CHECK warning lamp on the instrument cluster comes on when the fuel or
major electronic systems of the engine are not working properly. As a result, the
engine’s power output may decrease or the engine may stall.
Water Separator Warning Lamp
4.
When the water level inside water separator in fuel filter exceeds a certain level (approx.
45 cc), this warning light comes on and buzzer sounds.
Also, the driving force of the vehicle decreases (torque reduction). If these conditions
occur, immediately drain the water from fuel filter.