2.16  Engine  Mechanical  Systems
JL4G15-D

2.16.1  4G15-D  Engine  Mechanical  System
Overview

Compared with 4G18-D, 4G15-D engine mechanical system
has  the  same  content  in  Specification,  Description  and
Operation, the System Working Principle, Component Locator,
Schematic, Removal and Installation. For specific information,
please  refer  to

2.3

 

Fuel  System  JL4G18-D

.  This  chapter

described  contents  are  different  from  4G18-D.  For  relevant
information. Refer to the following content.

Engine

Engine Mechanical Systems JL4G15-D

2-823

2.16.1 Specifications
2.16.1.1 Fastener Tightening Specifications

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Spark Plug Bolts

M14 × 1.25

20-30

14.8-22.2

Cylinder Head Cover (Short Bolts)

M6

7-11

5.2-8.2

Cylinder Head Cover (Long Bolts,
Nuts, Special Bolts)

M6

9-13

6.7-9.6

Knock Sensor Bolt

M8 × 30

14.4-21.6

10.7-16

Cylinder Head Bolts

M10 × 1.25

First Pass 46-52

First Pass 34-38.5

Second Pass 76-84

Second Pass 56-62.2

VVT Actuator Mounting Bolt

M12 × 1.25

59-81

43.7-60

Intake Manifold Mounting Bolt

M8

24-36

17.8-26.7

Crankcase Mounting Bolt

M8

14.4-21.6

10.7-16

Exhaust Pipe Mounting Bolt

M8

20-30

14.8-22.2

Main Bearing Cap Retaining Bolt

M10 × 1.25

First Pass 42-46

First Pass 31-34

Second Pass 54-66

Second Pass 40-48.9

Flywheel Mounting Bolt

M10 × 1.25

83-93

61.4-68.8

Water Pump Short Mounting Bolt

M6 × 25

8-10

6-7.4

Water Pump Long Mounting Bolt

M6 × 35

9-13

6.7-9.6

Fuel Rail Retaining Bolts

M6 × 20

7.2-10.8

5.3-8

Connecting Rod Cap Retaining Bolt

M8 × 1

First Pass 19-21

First Pass 14-15.5

Second Pass 50-52

Second Pass 37-38.5

Camshaft Bearing Cap Retaining
Bolts

M8 M6

21.6-24.5
12.2-13.8

16-18.2

9-10.2

Oil Pan Retaining Bolts

M6

7.2-10.8

5.3-8

Oil Filter Mounting Bolt

M6

7.2-10.8

5.3-8

Engine Oil Pressure Alarm Bolts

R1 / 8

10.5-19.5

7.8-14.4

Oil Filter Pipe Joints Bolts

M28 × 1.5

16-24

11.8-17.8

Oil Filter Pipe Fittings Bolts

UNF3 / 4 "-16

33-37

24.4-27.4

Crankshaft Pulley Mounting Bolt

M12 × 1.25

129.7-146.3

96-108.3

Generator Through Screw

M10 × 1.25 × 72

43.2-64.8

32-48

Generator Retaining Bolt

M8 × 30

20-30

14.8-22.2

Clutch Assembly Mounting Bolt

M8

21.6-32.4

16-24

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Engine Mechanical Systems JL4G15-D

Engine

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Water Pump Outlet Components
Bolt

M10

25 and Above

18.5 and Above

Oil Pump Mounting Bolt

M6

7.2-10.8

5.3-8

Timing Chain Cover Bolt

M8

14.4-21.6

10.7-16

Timing Chain Cover Bolt

M6

8.8-13.2

6.5-9.8

Engine Right Mounting Bolts

M10 × 55

37.6-56.4

27.8-41.7

Drive Belt Tensioner Bolt

M12

55.2-82.8

40.8-61.3

Drive Belt Tensioner Nut

M8

23.2-34.8

17.2-25.8

Exhaust Camshaft Timing Sprocket
Mounting Bolt

M10

43.2-64.8

32-48

Oil Pan Oil Discharge Bolt

M12

25-35

18.5-25.9

Manufacturing Hole Plug

M20

39-49

28.8-36.1

Cylinder Head Oil Drain Plug

M14 × 1.25

24-36

17.7-26.6

Engine Hook Bolt

M10 × 1.25

27-49

19.9-36.1

Heater Outlet Pipe Components
Bolt

M6

7-11

5.2-8.1

Timing Chain Rail Mounting Bolt

M6

7-11

5.2-8.1

Timing Chain Tensioner Rail Mount
Bolt

M8

15-21

11.1-15.5

Timing Chain Tensioner Mounting
Bolt

M6

7-11

5.2-8.1

PCV Valve

NPT 3 / 8

20-30

14.8-22.1

Engine Coolant Inlet Connector
Components Retaining Bolt

M6

9-13

6.6-9.6

Oil Stick Tube Assembly Mounting
Bolt

M6

9-13

6.6-9.6

Ignition Coil Components

M6

7-11

5.2-8.1

Throttle Body Components
Retaining Bolt

M6

15-25

11.1-18.4

Stiffener To Install Intake Manifold
Retaining Bolt

M8

24-36

17.7-26.6

Upper (Lower) Heat Shield
Components Retaining Bolt

M8

14-22

10.3-16.2

Exhaust Manifold Bracket Retaining
Bolts

M10 × 1.25

28-42

20.7-31.0

Engine

Engine Mechanical Systems JL4G15-D

2-825

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Power Steering Pump Mounting
Bolt

M10

36-54

26.6-39.8

Compressor Retaining Bolt

M8

20-30

14.8-22.1

VVT Solenoid Valve Components
Retaining Bolt

M6

7-11

5.2-8.1

2.16.1.2 Mechanical System Specifications

Items

Specifications

Bore (mm/in)

77.8/3.07

Stroke (mm/in)

78.8/3.10

Displacement (L)

1.498

Compression Ratio

10.3:1

Power (km/rpm)

78/6,000

Torque (Nm/rpm)

135/4,800

Idle Speed (rpm)

750 ± 50 (Air-Conditioning A/C ON, 1,000 ± 50)

Ignition Sequence

1-3-4-2 (Cylinder No.1,4 and Cylinder No.2,3 group ignition)

Fuel

Octane Number 93 and Above Unleaded Motor Gasoline

Engine Coolant Capacity (L/pt)

6.0/10.56

Engine Oil Capacity (L/pt)

4.0/7.04

Engine Coolant Specifications / Grades

Comply With SH0521 (Freezing Point 

≤-40°C (-40 ºF)

Lubricant Specification / Grades

SAE10W-30 or 15W-40, API quality grade SJ and above, (winter
cold regions use SAE5W-30)

Spark Plug Type

K6RTC

Spark Plug Gap (mm/in)

0.9 ± 0.1/0.04 ± 0.003

Dry Mass (kg/lb)

Without Starter, With Oil, Coolant, Wiring Harness, and Clutch
110 ± 2/242.51 ± 4.41

Overall Size (LxWxH) mm/in

631 × 600 × 620/24.84 × 23.62 × 24.41

Camshaft

Journal Diameter (mm/in)

23/0.91

Camshaft Axial Clearance (mm/in)

0.05-0.12/0.0020- (-0.0047)

Intake Valve Clearance (mm/in)

0.23 ± 0.03/0.0091 ± 0.0011

Exhaust Valve Clearance (mm/in)

0.32 ± 0.03/0.0126 ± 0.0011

Intake VVT Adjustment Range

± 25 °

2-826

Engine Mechanical Systems JL4G15-D

Engine