Page 438 of 1336
1116-01
Name Size Quantity Tightening torque
Intake manifold lower bracket bolt M8 X 1.25 X 16 4
Exhaust manifold nut - 7
Heat protector bolt M6 X 1.0 X 25 7
Oil jet bolt - 4
Oil pump bolt M8 X 1.25 X35 3
Oil filter assembly assembly bolt M8 X 1.25 X30 3
Oil filter assembly assembly bolt M8 X 1.25 X65 1
Water pump bolt M6 X 1.0 X22 1
Belt tensioner upper bolt M8 X 1.25 X30 1
Belt tensioner lower bolt M10 X 1.5 X55 1
Water pump pulley bolt M6 X 1.0 X12 4
Thermostat bolt M6 X 1.0 X22 3
Coolant outlet port bolt M6 X 1.0 X22 3
Coolant pipe mounting bolt M6 X 1.0 X14 3
Bypass hose clamp M24 2
EPS idler pulley - 1
Engine mountinf stud bolt - 2
Engine front mounting bolt M10 X 45 3
Engine front mounting bolt M10 X 77 1
Engine front hanger bracket M8 X 1.25 X 20 2
Engine rear hanger bracket M8 X 1.25 X 20 4
A/C compressor bolt - 4
Alternator bolt M10 4
Start motor bolt M10 4 Max. 48Nm
Power steering braket bolt M8 X 1.25 X 50
Page 442 of 1336
1337-04
With HPS (Hydraulic Power Steering) With ESP (Electric Power Steering)
Length of belt : 1913mm Length of belt : 1740mm
1. Crankshaft pulley
2. Air conditioner compressor
3. Water pump
4. Alternator
5. Tension pulley
6. Power steering pump pulley
7. Idler pulley
1) Drive Belt
Overview
There are two types of belt system; EPS (Electric Power Steering) and HPS (Hydraulic Power Steering).
In the vehicle with ESP, instead of power steering pulley, the idle pulley is installed on the engine.
The belt system is a single belt drive system which uses single V-belt with 6 grooves. This design
provides the long life span and minimizes the belt slip and noise.
Components
With idle pulley instead of power
steering pump pulley With power steering pump pulley
Page 443 of 1336
2) Hydraulic Tensioner Assembly
The hydraulic tensioner maintains the belt tension to minimize the slip and vibration and provides long
life span of the belt. Hydraulic tensioner consists of hydraulic tension spring, hydraulic damper, lever arm
and tension pulley.
To transfer the tension to the belt from the hydraulic tensioner in small working space in G20DF engine,
the belt system uses the longer lever arm.Overview
Location and Components
Hydraulic tensioner assembly
Components
No Name
1 Tensioner pulley cap
2 Tensioner pulley mounting bolt
3 Tensioner pulley
4 Lever arm
5 Hydraulic tensioner bolt
6 Hydraulic tensioner
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1337-04
3) Crankshaft Pulley (CRS)
The strut type tensioner automatically adjusts the belt tension to provide the reliability and durability for
the system. And, the belt tension is decreased to minimize the friction loss and improve the belt
operating noise.Overview
Location
Crankshaft pulley (CRS)
Timing mark
Page 522 of 1336
Water pump
The water pump is driven by the engine drive belt and supplies
the coolant to each area of the engine.
Coolant reservoir
Thermostat
When the engine coolant
starts to open (fully open at
flow to the radiator to maintain
the engine temperature.
1. OVERVIEW
The coolant system is to keep the engine temperature stable.
2. COMPONENTS
Page 530 of 1336

1452-01
Troubleshooting
Item Cause Action
Overcharged batteryDefective alternator voltage regulator Replace
Defective voltage detection wiring Repair or replace
Discharged batteryLoose alternator drive belt
just the belt tension or
replace
Poor connection of related circuit or open
circuitRetighten the loose
connection or repair
open circuit
Defective alternator voltage regulator Replace
Terminated battery Replace
Defective ground Repair
Charge warning lamp does
not come on when turning on
ignition switch with engine
stoppedDefective alternator voltage regulator Replace
Open circuit in charge warning lamp, fuse
or wiringReplace or repair the
charge warning lamp or
fuse
Defective ignition switch Replace
Defective ground of alternator circuit Repair
Charge warning lamp does
not go off after starting
engineDefective alternator voltage regulator Replace
Corroded or worn battery cable Repair or replace
Loose alternator drive belt
Adjust the belt tension or
replace the belt
Defective wiring harness Repair or replace
Page 598 of 1336
ItemDescription
D20DTF D20DTF (Low CO2)
Applied engine D20DTF
Battery capacity 12V 90Ah
Alternator capacity Delphi 120A Delphi 140A
AlternatorChanged the diameter of belt pulley (Front view) )
Changed the regulator and control logic (Rear view)
EBSNoneMonitoring the battery conditions (voltage,
current, temperature and SOC)
2. COMPARISON
Page 631 of 1336
8410-00
2. CHECKING CABLES AND WIRES
Check for loose connection or rust.
Check terminals and wires for corrosion due to electrolyte leakage.
Check terminals and wires for open circuit.
Check the wire insulation and coat for damage, cracks or deterioration.
Check if the conductive parts of the terminals do not contact with vehicle body or other metal parts.
Check that the grounding part has continuity with mounting bolts and vehicle body.
Check that wires are properly routed.
Make sure that wires are securely fixed to avoid contact with sharp body parts and high-temperature
parts, such as the exhaust manifold and exhaust pipes.
The rotating parts, such as fan pulley and fan belt, perturbative parts and wiring should be secured
tightly at regular intervals.
Secure the wiring between the fixed parts, such as the vehicle body, and vibrating parts, such as the
engine, after slackening it slightly to prevent it from being damaged. -
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