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Great Wall engine 4G64S4M. Manual - part 2

11-2

Specifications

4G64 S4 MPI

Type

In-line OHV, SOHC

Number of Cylinders

Combustion Chamber

Single Pitch Roof

Total Displacement

2,351

Cylinder Bore

86.5

Stroke

100.0

Compression Ratio

9.5

Intake valve

before top dead center

Valve Timing

Off

after bottom dead center

Exhaust valve

before bottom dead center

Off

after top dead center

Lubrication system

Compression supply, full flow filtering

Type of oil pump

Gear type

Cooling system

Water cooling forced circulation

Type of water pump

Centrifugal impeller

ENGINE

SPECIFICATION

General

Items

11-3

ENGINE

SPECIFICATION

Specifications

Maintenance Standard

Unit

Items

Standard Value

Limit Value

Convex value of tensioner arm

Press-in value of tensioner arm (98~196N)

Height of cam

Air intake

37.39

36.89

Camshaft

Air exhaust

36.83

36.33

Shaft diameter

45.0

Planeness of Bottom Surface

0.03

0.2

Cylinder Head

Surface lapping limit*Total lapping of cylinder block and head

* 0.2

Total height

119.9

120.1

Length of cylinder head bol

97.4

99.4

Edge thickness

Intake

1.0

0.5

Exhaust

1.2

0.7

Diameter of valve stem

6.0

Valve

Intake

0.02

0.05

0.10

Exhaust

0.03

0.07

0.15

Inclination

45.5

Height

Intake

112.30

111.80

Exhaust

114.11

113.61

Free Height

51.0

50.0

Valve Spring

Working pre-tightening force/Working depth Kg/mm

27.2/44.2

Verticality

Contact width

0.9

1.3

Minor diameter

6.0

Valve Guide

Major diameter

11.0

Indentation depth

14.0

Convex value of valve stem

49.3

49.8

Oil Pump

Lateral clearance

Driving gear

0.08

0.14

Driven gear

0.06

0.12

Piston

Piston clearance

0.02

0.04

Lateral clearance

Ring No.1

0.02

0.06

0.1

Ring No.2

0.02

0.06

0.1

Piston Ring

Ring No.1

0.25

0.35

0.8

End clearance

Ring No.2

0.40

0.55

0.8

Oil control ring

0.10

0.40

1.0

Major diameter

22.0

Piston Pin

Indentation force Kg.

755

1750

Indentation temperature

Room temperature

Crankshaft

Internal clearance of crankshaft pin

0.02

0.05

0.1

Connecting Rod

Lateral clearance on big end

0.10

0.25

0.4

Generator

Toothed-belt

Radial clearance between valve

stem and valve guide

11-4

Items

Standard Value

Limit Value

Axial clearance

0.05

0.18

0.25

Crankshaft

Main shaft diameter

Connecting rod shaft diameter

Radial clearance of main shaft

0.02

0.04

0.1

Planeness of top surface

0.05

0.1

* 0.2

Cylinder Block

Total Height

290

0.1

Minor diameter of cylinder hole

86.50

86.53

Cylinder Block

Cylindricity of cylinder hole

0.01

Generator

Resistance of rotor coil

0.05 O.S.

11.05

11.07

0.25 O.S.

11.25

11.27

0.50 O.S.

11.50

11.52

Cylinder Head

0.30 O.S.

34.435

34.455

0.60 O.S.

34.735

34.755

0.30 O.S.

31.935

31.955

0.60 O.S.

32.235

32.255

Top surface lapping limit*Total lapping

of cylinder block and head

Secondary processing dimension of the

enlarging of mounting hole of valve guides

(intake valve and exhaust valve)

Secondary processing dimension of the

enlarging of round hole of intake valve seat

Secondary processing dimension of the en-

larging of round hole of exhaust valve seat

Remarks:

O.S.: Diameter increased

ENGINE

SPECIFICATION

11-5

ENGINE

SPECIFICATION

Tightening Torque

Fastening Location

Torque (Kg.M)

Generator and Ignition System

Fastening bolt of AC generator

2.4

Stay bolt

2.4

Pivot nut

2.3

Crankshaft pulley bolt

2.5

Spark plug

2.5

Ignition coil bolt

1.1

Timing toothed-belt

Lower front cover of timing toothed-belt

1.1

Tensioning pulley bolt

4.9

Tensioning wheel arm bolt

2.2

Automatic tensioning wheel bolt

2.4

Central pulley bolt

3.6

Tensioning wheel bracket

4.9

Rear cover of timing toothed-belt

1.1

Timing belt indicator

0.9

Toothed-belt wheel of oil pump

5.5

Crankshaft toothed-belt wheel bolt

12.0

Tensioner

1.9

Toothed-belt wheel of balancing shaft

4.6

Camshaft toothed-belt wheel bolt

9.0

Toothed-belt wheel of balancing shaft

4.6

Fuel System

Throttle

1.9

Fuel distributing pipe assembly

1.2

Intake manifold

Eye bolt of engine

1.9

Cooling water temperature sensor plug of engine

3.0

Water outlet port coupling bolt

2.0

Intake manifold bolt

2.0

Water temperature sensor

3.0

Exhaust manifold

Exhaust manifold cover bolt

1.4

Water inlet port coupling bolt

2.4

Exhaust manifold nut (M8)

3.0

Exhaust manifold nut (M10)

5.0

Cooling water bypass pipe connector bolt

2.4

Cooling water pipe assembly bolt

1.3

Thermostat shell bolt

2.4

Water pump bolt

1.4

Rocker Arm and Camshaft

Rocker cover bolt

0.4

Rocker arm and camshaft assembly bolt

3.2

Thrust cover screw

1.9

Cylinder head and valve

Cylinder head bolt

2.0

90 90

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