Chery Fora (Elara A520). Manual — part 50

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

3

Expansion Tank

Cap

（kpa）

Pressure Relief Valve

（Release Pressure to

Outside

）

88±14.5

Vacuum Valve

（Lead Air

into Tank

）

-10~~~~-2

Thermostat

Working

Temperature

（ ）

Start Working

Temperature

87

Full Working

Temperature

104

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

4

TECHNOLOGY DATA INSTRUCTION

Item Standard

Value

Camshaft

Cam Height

Intake cam

37.15

Exhaust cam

37.05

Camshaft Diameter

Intake cam

Exhaust cam

Axial clearance of Camshaft

Intake cam

0.15--0.20

Exhaust cam

0.15--0.20

Cylinder

Head

Plane Degree of Lower Surface

0.04

Whole Height

140±0.41

Surface Grind Limit* Total Grinding Quantity of

Cylinder Block and Head

Valve

Fringe Thickness on Top of Valve

Intake Valve

0.3±0.15

Exhaust Valve

0.3±0.15

Valve Stem Diameter

Intake Valve

5.98±0.008

Exhaust Valve

5.96±0.008

Seal Bandwidth

Intake Valve

Exhaust Valve

Gap Between Valve Stem And Guide

Intake Valve

0.02

Exhaust Valve

0.04

Tilt Angle

Intake Valve

65°

Exhaust Valve

68°

Height

Intake Valve

107.998

Exhaust Valve

106.318

Valve

Spring

Free Height

47.7

Working Tension in Advance/ Working Height Kg /mm

620N/32mm

Vertical Degree

Valve

Guide

Valve Guide Length

38±0.25

Inside Diameter

5.4±0.1

24

040

.

0

053

.

0

−
−

24

040

.

0

053

.

0

−
−

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

5

Outer Diameter

Pressure Height

16±0.3

Protruding Part of Valve Stem

47.5

Piston Piston

Skirt

Diameter

83.46±0.009

Piston

Ring

Side Clearance

1

st

Ring

0.04--0.08

2

nd

Ring

0.01--0.025

End Play

1

st

Ring

0.2--0.4

2

nd

Ring

0.4--0.6

Height

1

st

Ring

2

nd

Ring

Oil Ring

Ring

Groove

Height/ Depth

1

st

Ring

2

nd

Ring

Oil Ring

2.5

Piston Pin

Diameter

Length 60

Diameter of Piston Pin Hole

Crankshaft

Axial Clearance

0.076--0.265

Radical Clearance

-0.0375

Crankshaft Mainshaft Diameter

Coaxial Degree

0.05

Cylindricity 0.008

Roundness

0.005

Connecting Rod Journal Diameter

Cylindricity

Roundness

Cylinder

Whole Height

218±0.05

Cylinder Hole Roundness / Straightness Accuracy

0.008 / 0.01

Upper Surface Planeness

0.04

Connectin

g Rod

Radial Clearance of Connecting Rod Bearing

0.016--0.051

Axial Clearance of Big End

0.15--0.4

11

051

.

0

040

.

0

+
+

2

.

1

05

.

0

03

.

0

+
+

5

.

1

04

.

0

02

.

0

+
+

5

.

2

03

.

0

01

.

0

+
+

21

0

005

.

0

−

21

008

.

0

002

.

0

2

.

1

01

.

0

03

.

0

−
−

5

.

1

005

.

0

030

.

0

−
−

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

6

SECTION 2 SPECIAL TOOLS

Camshaft Timing Tool

Crankshaft Timing Tool

Flywheel Tool

Guide Sleeve of Crankshaft Oil

Seal

Guide Sleeve of Camshaft Oil

Seal

Hydraulic Hoist